An optical computing device includes an optical computing section including a first transmissive optical modulation element having cells each having an independently set phase modulation amount. The first transmissive optical modulation element emits a signal light, in a signal direction, generated when transmitted light beams phase-modulated by the cells interfere with each other and a noise light, in a noise direction, transmitted through the first transmissive optical modulation element without being phase-modulated by the cells. The optical computing device includes an optical sensor that detects the signal light outputted from the optical computing section and generates an electrical signal indicating a result of the detection. The first transmissive optical modulation element is configured such that an impact that the noise light has on the electrical signal is smaller than the impact in a state where the signal direction aligns with the noise direction.
A digital phase shifter includes a plurality of digital phase shift circuit groups in which a plurality of digital phase shift circuits are connected in cascade, and one or more bend type connection portions that connect two of the digital phase shift circuit groups to each other, in which a connection portion includes a coil that is connected in series between a signal line of a first digital phase shift circuit and a signal line of a second digital phase shift circuit, of two of the digital phase shift circuits, a pair of capacitors that are connected in parallel on both sides of the coil, and a pair of electronic switches that are each provided on one end side of the pair of capacitors and that switch whether or not to ground the one end side of the pair of capacitors.
A terminal that inputs and outputs optical signals of optical fibers in an optical cable includes a housing, an input port that introduces the optical signals into an inside of the housing, wavelength demultiplexers that receive and demultiplex the introduced optical signals into a wavelength band and wavelength bands other than the wavelength band, a distribution port that distributes optical signals demultiplexed into the wavelength band to an external terminal, and an output port that extracts optical signals demultiplexed into the wavelength bands to an outside of the housing. A total number of the wavelength demultiplexers is equal to a total number of the optical fibers. Each of the wavelength demultiplexers is connected to a corresponding optical fiber of the optical fibers.
A multi-core fiber includes a cladding, cores extending in an extending direction inside the cladding, a marker inside the cladding, and an end surface inclined in an inclined direction that is not orthogonal to the extending direction. The cores at the end surface are line-symmetrically arranged with respect to a virtual axis orthogonal to the inclination direction. The virtual axis virtually divides the end surface into a first area and a second area. The cores include a first core disposed farthest from the virtual axis in the first area and a second core disposed farthest from the virtual axis in the second area. A center of the marker at the end surface is disposed in an area between a straight line, passing through the first core, parallel to the virtual axis and a straight line, passing through the second core, parallel to the virtual axis.
G02B 6/04 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
A cable bundle includes a cable that is wound. The cable bundle includes unit bundles stacked in a stacking direction perpendicular to a first direction that is a circumferential direction of the cable bundle. Each of the unit bundles includes a first loop and a second loop that are stacked in the stacking direction, and the first loop and the second loop are connected via a respective one of connecting parts such that a figure-8 shaped loop including the first loop and the second loop is formed in a state in which each of the unit bundles is opened. The connecting parts of adjacent ones of the unit bundles in the stacking direction are disposed at different positions in the first direction.
An optical connection assembly (into which a plurality of optical connectors are inserted) includes: a plurality of adapter modules that include a plurality of holding portions, include an insertion hole into which the optical connector is insertable and in which the inserted optical connector is holdable (the plurality of holding portions are disposed in parallel in a first direction intersecting an insertion direction in which the optical connector is inserted); and a shaft member that extends in a second direction intersecting the first direction and the insertion direction and supports the plurality of adapter modules. The plurality of adapter modules are relatively movable along the shaft member in the second direction. A distance over which the plurality of adapter modules are relatively movable is equal to or greater than a dimension of the insertion hole in the second direction.
A wireless communication system includes a wireless communication device and a plurality of wireless devices. The wireless communication device includes a phased array antenna having a beam forming function, and a control unit that controls a direction of a beam of the phased array antenna and performs control of providing a service according to the direction of the beam of the phased array antenna. For example, the wireless communication device is installed on a platform, the wireless device is installed on a train that enters the platform, and the wireless communication device provides a service of causing a monitor provided on the train that enters a track of the platform to display an image of the track of the platform where the train enters.
H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
H01Q 3/34 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means
H04W 4/44 - Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
An object of the present invention is to provide a ferrule and an optical connection structure capable of stabilizing optical connection quality when performing positioning without using pins. A ferrule (50) according to the present invention has a fiber hole (51) into which an optical fiber (F) is to be inserted, a light-emitting surface from which light that has passed through the optical fiber (F) is to be emitted, and a longitudinal reference surface (50a) that determines a position of the ferrule (50) in a longitudinal direction with respect to a receptacle (30). The longitudinal reference surface (50a) is positioned between a center line (O) passing through a center position of the ferrule (50) in the longitudinal direction and the light-emitting surface.
An alignment device (200) includes imaging units (105A) and (105B) configured to capture side surface images of a pair of optical fibers (10A) and (10B) for one turn in a circumferential direction at a plurality of focus positions, a feature amount calculation unit (112) configured to calculate, for each of the focus positions, a feature amount obtained by digitizing features of the side surface images for one turn of each of the optical fibers (10A) and (10B), a degree of asymmetry calculation unit (113) configured to calculate, for each of the focus positions, a degree of asymmetry between the feature amounts for one turn of the respective optical fibers (10A) and (10B), a focus position selection unit (114) configured to select a specific focus position among the focus positions having a predetermined degree of asymmetry or more, and a rotation alignment unit configured to perform alignment of the pair of optical fibers (10A) and (10B) in the circumferential direction based on the side surface images for one turn of the respective optical fibers (10A) and (10B) at the selected focus position.
A multi-core fiber having a first end surface and a second end surface includes a cladding and cores inside the cladding. The cores extend in a first extending direction at the first end surface and extend in a second extending direction at the second end surface. The first end surface is inclined in an inclination direction that is not orthogonal to the first extending direction. The second end surface is inclined in an inclination direction that is not orthogonal to the second extending direction. In a state of contact where the first end surface is in contact with the second end surface such that an angle made by the first extending direction and the second extending direction is minimized, each of the cores at the first end surface at least partially overlaps one of the cores at the second end surface.
G02B 6/04 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
11.
OPTICAL COMMUNICATION NETWORK AND METHOD FOR MANUFACTURING SAME
An optical communication network includes three or more nodes and a domain in which each of transmission paths, that connects two of the three or more nodes within the domain, is constituted by a multi-core fiber or a multi-core fiber connected body in which positions of markers on both end surfaces of the multi-core fiber connected body are swapped.
A control device includes a processor that identifies a position of a marker in an end surface of a multi-core fiber and controls an alignment mechanism to align the multi-core fiber such that the position of the marker satisfies a predetermined condition.
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
13.
ROUND AND SMALL DIAMETER OPTICAL CABLES WITH A RIBBON-LIKE OPTICAL FIBER STRUCTURE
Ann optical fiber cable including an optical fiber ribbon in a pipe, wherein the ribbon includes at least two optical fibers arranged side by side, and wherein at least two of the optical fibers are bonded intermittently along a length of the fibers.
An optical communication network includes: nodes; and a domain in which all of transmission paths that connect the nodes within the domain are constituted by multi-core fiber connected bodies, each of which includes one or more multi-core fibers and one or more pairs of Fan-In/Fan-Out (FI/FO) devices respectively connected to ends of a corresponding one of the one or more multi-core fibers. Each pair of the one or more pairs of FI/FO devices connected to ends of the corresponding one of the one or more multi-core fibers has a reversely symmetrical coupling structure. Each of the one or more pairs of FI/FO devices includes ports identifiable from each other and coupled with respective cores of the one or more multi-core fibers.
An optical connector includes a ferrule including a connection end surface having a fiber hole through which an optical fiber is inserted, a holding member that holds the ferrule, a spring push, and a biasing member that biases the ferrule, one end of the biasing member contacting the holding member and the other end of the biasing member contacting the spring push. The holding member includes an engaging portion. The spring push includes an engaged portion that engages the engaging portion.
An optical fiber element wire includes a bare wire part including a core and a cladding and extending in an axial direction of the bare wire part, a primary layer covering the bare wire part, and a secondary layer covering the primary layer. The optical fiber element wire is configured such that, when a point load is applied to the optical fiber element wire with a spherical pin having a diameter of 3 mm, a void occurs in the primary layer before peeling occurs between the bare wire part and the primary layer and before cracking occurs within the primary layer.
An optical fiber element wire includes: a bare wire part including a core and a cladding and extending in an axial direction of the bare wire part; a primary layer covering the bare wire part; and a secondary layer covering the primary layer. A Young's modulus of the primary layer is within a predetermined range that removes a void within the primary layer in response to the optical fiber element wire being heated at either 45° C. or 60° C. for 3 minutes or more.
An optical fiber cable includes: a core including an optical fiber; a wrapping tube wrapping the core; a jacket housing the core and the wrapping tube; a tension-resisting member of a Fiber Reinforced Plastic (FRP) embedded in the jacket; and a wire member that is flexible, includes fibers, and is embedded in the jacket. In a transverse cross-sectional view, the wire member is disposed inside a virtual circle that has a center at a center axis of the core and that passes through a center of the tension-resisting member. A circumferential dimension of the wire member is greater than a radial dimension of the wire member.
An optical fiber cable includes: a core including optical fibers; a reinforcing wrap that surrounds the core; and a sheath that accommodates the core and the reinforcing wrap. The reinforcing wrap includes an overlapping portion. A first end portion of the reinforcing wrap overlaps a second end portion of the reinforcing wrap at a portion of the reinforcing wrap in a circumferential direction of the optical fiber cable in a cross-sectional view.
An optical fiber cable includes: a core including an optical fiber; a first protective layer covering the core; and a second protective layer covering the first protective layer. An outer circumferential surface of the first protective layer has: one or more integrated regions fixed to or in pressure contact with the second protective layer; and one or more non-integrated regions neither fixed to nor in pressure contact with the second protective layer.
A method of producing a structure that includes: a delivery fiber; a small glass tube that covers a section including one end face of the delivery fiber; and a glass block that is joined to the one end face of the delivery fiber and that is joined to one end face of the small glass tube, the method includes: forming, at a portion other than the one end face of the small glass tube, a tapering section that includes, as part of a surface thereof, a sloping surface sloping at an angle of more than 0° and less than 90° to an optical axis of the delivery fiber; and inserting the delivery fiber into a small hole in the small glass tube.
A method of producing a structure that includes: a delivery fiber; a bridge fiber that is joined to one end face of the delivery fiber and that is larger in diameter than the delivery fiber; and a glass block that is joined to one end face of the bridge fiber, the method includes: forming, at a portion other than the one end face of the bridge fiber, a tapering section that includes, as part of a surface thereof, a sloping surface sloping at an angle of more than 0° and less than 90° to an optical axis of the bridge fiber; and fusion-splicing the delivery fiber and the tapering section of the bridge fiber using an optical fiber fusion splicer.
An optical fiber cable includes a core including an optical fiber, a restricting member longitudinally attached to and covering the core, a sheath covering the restricting member, and a ripcord disposed between the sheath and the core and between a first part of the restricting member and a second part of the restricting member.
An optical connector cleaning tool that cleans a connection end surface of an optical connector includes a cleaning shaft that includes a pressing surface that presses a cleaning element having a belt shape against the connection end surface and holds the cleaning element turned back at the pressing surface, a supply part that supplies the cleaning element to the pressing surface via a supply path, and a collection part that collects the cleaning element from the pressing surface via a collection path. The cleaning shaft further includes a first main surface and a second main surface opposite to the first main surface. The supply path and the collection path are along the first and second surfaces. The optical connector cleaning tool further includes a path reversing part that reverses the supply path and the collection path between the first main surface and the second main surface.
An optical connection unit connected to a photonic integrated circuit, includes: optical fibers having different mode field diameters; a ferrule that holds the optical fibers; a ferrule-side microlens array that transmits optical signals from distal end surfaces of the optical fibers held by the ferrule toward the photonic integrated circuit; and light adjustment units in the ferrule-side microlens array that respectively correspond to the optical fibers. The light adjustment units vary in shape depending on the mode field diameters such that the optical signals transmitted through the light adjustment units become parallel light.
An optical fiber cable includes: a multi-core optical fiber including a cladding and cores in the cladding; and a piece of arrangement information associated with the multi-core optical fiber and with a core arrangement of the cores in a cross-section of the multi-core optical fiber.
An optical fiber preform includes: a clad rod having a hole extending along a longitudinal direction of the optical fiber preform and a clad glass body that constitutes at least a part of a clad in an optical fiber, where the hole is open at both ends of the clad rod; and a glass rod including a predetermined glass body that constitutes a predetermined portion different from the clad in the optical fiber, where the glass rod is disposed in the hole. The hole has a diameter that increases from a first side of the optical fiber preform in the longitudinal direction toward a second side of the optical fiber preform in the longitudinal direction.
A fiber bundle connector includes a plurality of optical fibers and a ferrule that has a connection end surface and a fiber hole that extends to the connection end surface and into which the plurality of optical fibers are inserted. On at least the connection end surface, a plurality of optical fibers inserted into the fiber hole are most densely disposed such that adjacent optical fibers are in contact with each other, and all the optical fibers located at an outermost periphery among the plurality of optical fibers disposed most densely are pressed on an inner wall of the fiber hole to cause the inner wall to elastically and plastically deform.
A multi-fiber optical connector includes: a ferrule that includes a connection end provided with a connection end surface, a base end located on a side opposite to the connection end, and a plurality of fiber holes through which a plurality of optical fibers are insertable toward the connection end surface; a first member that is disposed to face the base end of the ferrule in a longitudinal direction in which the fiber holes extend; a biasing member that is disposed between the first member and the ferrule in the longitudinal direction, and biases the ferrule toward the connection end; and a spring push that presses the first member toward the connection end via rotational movement.
An optical fiber includes a core, a helical section in which the core has a helical shape, and a first end part that is included in either a first non-helical section in which the core has a linear shape or a first gently helical section in which a total number of helices of the core per unit length is smaller than that in the helical section.
An optical computing device includes an image sensor including one or more light receiving cells, one or more optical modulation elements each including cells that each have a phase-modulation amount, an optical splitter element that splits signal light into monitoring signal light entering the image sensor and computing signal light entering the one or more optical modulation elements, and a controller that independently sets the phase-modulation amount of each of the cells in accordance with an intensity of the monitoring signal light detected by a corresponding one of the light receiving cells of the image sensor.
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
A multicore optical ferrule includes a main body including a connection end surface configured to connect to a connection target and insertion holes into which optical fibers are respectively inserted. Each of the insertion holes extends from the connection end surface toward an inside of the main body. Each of the insertion holes has a first inner diameter portion open to the connection end surface and a second inner diameter portion having a diameter larger than a diameter of the first inner diameter portion. An inner wall of the first inner diameter portion of each of the insertion holes includes micro holes.
An antenna module includes a first substrate, a second substrate, and a heat dissipation structure. An RFIC (first IC) is provided on a facing surface (first mounting surface) of the first substrate facing the heat dissipation structure. The RFIC is thermally in contact with the heat dissipation structure and processes a high frequency signal. A BBIC (second IC) is provided to be thermally in contact with the heat dissipation structure and to process a baseband signal on a facing surface (second mounting surface) of the second substrate facing the heat dissipation structure. A connecting portion which electrically connects adjacent end portions of the first substrate and the second substrate, is provided. An angle θ between the facing surfaces is a right angle or an acute angle.
An antenna module includes a first substrate that includes a first antenna element and a feeding line to a second antenna element and configured to handle a high-frequency signal in a millimeter wave band, a second substrate arranged to overlap a portion of the first substrate in plan view and configured to handle a baseband signal having a frequency band lower than that of the high-frequency signal, and a metal housing that includes a first accommodation space configured to accommodate a RFIC, a second accommodation space configured to accommodate a BBIC, and a shielding wall provided between the first accommodation space and the second accommodation space, the shielding wall is arranged to overlap the feeding line in plan view, and at least one of the shielding wall and the first substrate includes a non-interference portion configured to reduce interference between the shielding wall and the feeding line.
H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure
H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
An optical switch that switches an optical path of signal light obtained by modulating carrier light by a control signal and a data signal, includes an optical modulation element that reflects or refracts the signal light and includes cells each having an independently set phase modulation amount with which the signal light is emitted in a direction corresponding to a ratio of a period of the control signal to a period of the carrier light.
A spatial light modulator includes unit cells each comprising two or more adjacent microcells, wherein the microcells each have a cell size that is either less than 1 μm or equal to or smaller than a wavelength of signal light and a black matrix that surrounds the unit cells.
An optical computing device includes a spatial light modulator that carries out binary modulation of carrier light for each cell and generates first signal light representing a first wave number space image and an optical modulation element group including two or more optical modulation elements that sequentially act on the first signal light.
G06E 1/04 - Devices for processing exclusively digital data operating upon the order or content of the data handled for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
38.
ESTIMATION METHOD, MEASUREMENT METHOD, AND INFORMATION PROCESSING DEVICE
An estimation method includes estimating, using a relational equation, a measurement variation in a group delay from one or both of a loss in a target optical fiber and a power of a target light source. The group delay occurs when light generated by the target light source is inputted into the target optical fiber.
A polarization maintaining fiber includes a core, paired stress applying parts disposed on both sides of the core, and a clad encompassing the core and the paired stress applying parts. When the polarization maintaining fiber has a fiber length of 2 m and a bend radius of 140 mm, the polarization maintaining fiber has a cut-off wavelength equal to or greater than 1.41 μm and less than 1.55 μm, and when the polarization maintaining fiber has a bend radius of 5 mm and twists at a rate of one rotation per 31.4 mm of fiber length, the polarization maintaining fiber has a bending loss equal to or less than 7 dB at a wavelength of 1.55 μm.
A polarization maintaining fiber includes a core, paired stress applying parts disposed on both sides of the core, and a clad encompassing the core and the paired stress applying parts. When the polarization maintaining fiber has a fiber length of 2 m and a bend radius of 140 mm, the polarization maintaining fiber has a cut-off wavelength equal to or greater than 1.20 μm and less than 1.31 μm. When the polarization maintaining fiber has a bend radius of 5 mm and twists at a rate of one rotation per 31.4 mm of fiber length, the polarization maintaining fiber has a bending loss equal to or less than 6.6 dB at a wavelength of 1.31 μm.
A pressure sensitive sensor unit includes: a first pressure sensitive sensor with a first output that changes according to a magnitude of an applied load; a second pressure sensitive sensor with a second output that changes according to the magnitude of the applied load; a plate member arranged so as to include the first and second pressure sensitive sensors in a plan view; a first load transmitting member interposed between the first pressure sensitive sensor and the plate member; and a second load transmitting member interposed between the second pressure sensitive sensor and the plate member. The first load transmitting member transmits a load belonging to a first load range to the first pressure sensitive sensor. The second load transmitting member transmits a load belonging to a second load range to the second pressure sensitive sensor. The second load range is larger than the first load range.
G01L 1/22 - Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluidsMeasuring force or stress, in general by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
An optical switch that switches an optical path of signal light obtained by modulating carrier light by a control signal and a data signal includes a mirror and a half mirror, an optical modulation element that reflects or refracts the signal light reflected by the mirror and the half mirror and includes cells each having an independently set phase modulation amount, a light detector that detects, at once, intensities of beams of the signal light passing through the half mirror and reflected by the mirror and the half mirror different times, and a controller that decodes the control signal from the detected intensities and sets the independently set phase modulation amount of each of the cells such that the signal light is emitted in a direction corresponding to the control signal.
An optical fiber assembly includes: bundled optical fiber units, each of which is configured by stacking optical fiber ribbons. A stacked state of the optical fiber ribbons in an optical fiber unit of the bundled optical fiber units is collapsed such that a ribbon surface of at least one of the optical fiber ribbons configuring the optical fiber unit is bent, in a cross section of the optical fiber assembly orthogonal to a longitudinal direction of the optical fiber assembly at least at a first position in the longitudinal direction. The bundled optical fiber units include inner layer fiber units located on an inner side in a radial direction of the optical fiber assembly, and outer layer fiber units located on an outer side in the radial direction of the optical fiber assembly relative to the inner layer fiber units, in a cross section of the optical fiber assembly.
An optical fiber assembly includes: bundled optical fiber units, each of which is configured by stacking optical fiber ribbons. A stacked state of the optical fiber ribbons in an optical fiber unit of the bundled optical fiber units is collapsed such that a ribbon surface of at least one of the optical fiber ribbons configuring the optical fiber unit is bent, in a cross section of the optical fiber assembly orthogonal to a longitudinal direction of the optical fiber assembly at least at a first position in the longitudinal direction. The bundled optical fiber units include one or more first fiber units located on a neutral line of bending of the optical fiber assembly and a second fiber unit located farthest from the neutral line, in a cross section of the optical fiber assembly orthogonal to the longitudinal direction.
An optical combiner includes input optical fibers and a bridge fiber. The input optical fibers each includes a core, a first cladding surrounding the core and having a refractive index lower than a refractive index of the core, a second cladding surrounding the first cladding and having a refractive index lower than the refractive index of the first cladding, and a third cladding surrounding the second cladding and having a refractive index lower than the refractive index of the second cladding. The bridge fiber has an incident surface optically coupled to the core of each of the input optical fibers and an emitting surface that emits light obtained by multiplexing the light incident from each of the input optical fibers.
An optical fiber cable including an optical fiber ribbon in a pipe, wherein the ribbon includes at least two optical fibers arranged side by side, and wherein at least two of the optical fibers are bonded intermittently along a length of the fibers.
To reduce return loss in a transmission line that transmits a high-frequency wave between a pair of main surfaces of a substrate, as compared with the input/output structure included in the filter device disclosed in Patent Literature 1. The transmission line (1) includes: a substrate (10); a coplanar line (20) including a signal line pattern (21) provided on a main surface (11) and a first coplanar pattern (coplanar patterns 22 and 23) provided on the main surface (11); and a two-conductor line (30) including a first through via (31) electrically connected with the signal line pattern (21) and a ground conductor (through vias 32 and 33).
An optical connector includes a ferrule that has a connection end face and a fiber hole; an embedded fiber that has an insertion portion inserted into the fiber hole, and an extension portion extending from the fiber hole; a connection fiber that is fusion-spliced to the extension portion; a temporary fixing member into which the extension portion is inserted; a heat-shrinkable sleeve that is shrunk by heating, accommodates a connection point of the two fibers, and is fixed to an end portion of the temporary fixing member; a plug frame that has a frame body portion and a regulating portion regulating relative movement of the ferrule with respect to the frame body portion; a tubular stop ring that has a biasing surface, and is locked to the plug frame; and a biasing member that is disposed between the ferrule and the biasing surface and biases the ferrule.
An optical connection structure includes a first ferrule, a second ferrule, and a split sleeve that has an insertion hole into which at least part of the first ferule and at least part of the second ferule are inserted, in which the split sleeve has a first end in which the first ferrule is inserted and a second end in which the second ferrule is inserted, and when assuming that a dimension of a first taper surface is x1, a distance between a first connection end surface and the first end is y1, a dimension of the second taper surface is x2, and a distance between a second connection end surface and the second end is y2, the following expressions a, b, and c are established.
An optical connection structure includes a first ferrule, a second ferrule, and a split sleeve that has an insertion hole into which at least part of the first ferule and at least part of the second ferule are inserted, in which the split sleeve has a first end in which the first ferrule is inserted and a second end in which the second ferrule is inserted, and when assuming that a dimension of a first taper surface is x1, a distance between a first connection end surface and the first end is y1, a dimension of the second taper surface is x2, and a distance between a second connection end surface and the second end is y2, the following expressions a, b, and c are established.
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A cable accommodating body includes one or more cable bundles made of a wound cable and not having any winding core and one or more first containers accommodating the one or more cable bundles and having a first outlet and a second outlet through each of which the wound cable is pulled out from an inside of the one or more first containers.
B65D 25/10 - Devices to locate articles in containers
B65D 85/04 - Containers, packaging elements or packages, specially adapted for particular articles or materials for annular articles for coils of wire, rope or hose
B65H 49/02 - Methods or apparatus in which packages do not rotate
51.
OPTICAL CABLE STRUCTURE AND OPTICAL CABLE STRUCTURE PRODUCTION METHOD
An optical cable structure includes connector-equipped optical fibers, derived from an end portion of a sheath of an optical cable, that are accommodated in a tubular member. Each of the connector-equipped optical fibers includes a derivation optical fiber from the end portion of the sheath and an optical connector disposed at a distal portion of the derivation optical fiber. Lengths of at least some of the derivation optical fibers are different from each other. Each of the derivation optical fibers includes a proximal-side optical fiber on an end portion side of the sheath, a distal-side optical fiber on an optical connector side, and a connecting portion connecting the proximal-side optical fiber to the distal-side optical fiber. The connecting portions are disposed in the tubular member when the connector-equipped optical fibers are accommodated in the tubular member.
An optical phase modulator includes a block constituting a magnetic free layer and having a first face, a second face opposite to the first face, an entrance face different from the first face or the second face and through which light enters, and an exit face different from the first face or the second face and through which light exits. The optical phase modulator includes a first electrode disposed to the first face, either directly or not directly on the first face.
G02F 1/225 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour by interference in an optical waveguide structure
A method includes inputting, via a first position adjustment optical structure, adjustment signal light into a second position adjustment optical structure. A first light diffraction element of an optical computing device includes a first computing optical structure constituted by microcells, and the first position adjustment optical structure. A second light diffraction element of the optical computing device includes a second computing optical structure constituted by microcells, and the second position adjustment optical structure. The method includes adjusting, based on the adjustment signal light outputted from the second position adjustment optical structure, a position of the second light diffraction element with respect to the first light diffraction element.
A digital phase shift circuit includes: a basic phase shift circuit including a signal line, a pair of inner lines provided on both sides of the signal line, a pair of outer lines provided outside of the inner lines, a first grounding conductor connected to one ends of the pair of inner lines and the pair of outer lines, a second grounding conductor connected to the other ends of the pair of outer lines, and a pair of electronic switches provided between the other ends of the pair of inner lines and the second grounding conductor; and an output circuit configured to decrease an output load of the basic phase shift circuit in comparison with an input load thereof.
An optical fiber ribbon includes optical fibers disposed in a disposition direction perpendicular to a longitudinal direction of the optical fiber ribbon and connection parts each disposed between and connecting two or more of the optical fibers adjacent in the disposition direction. The connection parts are disposed intermittently in the longitudinal direction and the disposition direction. The optical fiber ribbon has a first high-density region and a low-density region adjacent in the longitudinal direction. Two or more of the connection parts, having different positions from each other in the longitudinal direction and the disposition direction, are disposed in the first high-density region. A number density of the connection parts in the low-density region is lower than a number density of the connection parts in the first high-density region.
A light diffraction element unit includes a light diffraction element including a substrate having a first main surface and a second main surface and a light diffraction structure composed of microcells and disposed on the first main surface, a first light-transmissive coating layer that covers the first main surface, and a second light-transmissive coating layer that covers the second main surface. A shape of a main surface of the first light-transmissive coating layer and a shape of a main surfaces of the second light-transmissive coating layer are complementary to each other. The main surface of the first light-transmissive coating layer is disposed opposite one side of the substrate. The main surface of the second light-transmissive coating layer is disposed opposite another side of the substrate.
A ferrule holding structure includes a ferrule into which an optical fiber is inserted from a rear end of the ferrule to a connection surface at a front end of the ferrule and that holds the optical fiber, a biasing member that biases the ferrule in a forward direction from the rear end toward the connection surface, a housing that accommodates the biasing member and at least a part of the ferrule, and a support member that engages with the housing and that supports a rear end side of the biasing member. The support member includes a guide portion that guides the support member into the housing in an intersecting direction and a pressing face that presses the biasing member in the forward direction along with a movement of the support member in the intersecting direction to a position where the support member engages with the housing.
A digital phase shifter includes a bend-type connection portion configured to connect a first digital phase shift circuit located at an end of a first digital phase shift circuit group and a second digital phase shift circuit located at an end of a second digital phase shift circuit group and include a third digital phase shift circuit. A capacitor is connected in parallel to at least one of a first connection line of a first connection portion, a first connection line of a second connection portion, a region in a vicinity of a connection position between two digital phase shift circuits constituting a first digital phase circuit group, and a region in a vicinity of a connection position between two adjacent digital phase shift circuits constituting a second digital phase circuit group.
A ferrule holding structure includes an optical fiber, a ferrule into which the optical fiber is inserted from a rear end of the ferrule to a connection surface at a front end of the ferrule and that holds the optical fiber, a biasing member biasing the ferrule in a forward direction from the rear end toward the connection surface, a housing accommodating the biasing member and at least a part of the ferrule, a support member engaged with the housing and supporting a rear end side of the biasing member, and a rotation mechanism, structured with a part of the support member and a part of the housing, that rotatably attaches the support member to the housing. The support member includes a pressing surface that presses the biasing member in the forward direction along with a rotation of the support member with respect to the housing.
A fiber assembly includes multi-core fibers each having a first end and a second end. The first end and the second end are distinguishable from each other. The multi-core fibers are bundled such that: the first end of one of the multi-core fibers is closer to a first end of the fiber assembly than to a second end of the fiber assembly, and the second end of another of the multi-core fibers is closer to the first end of the fiber assembly than to the second end of the fiber assembly.
In an array antenna device, a third power supply line includes an extension portion, a first branch line overlapping a first slot and a second branch line overlapping a second slot in a plan view, the first branch line and the second branch line branching from an extension portion. The length of the first branch line up to the first slot is equal to the length of the second branch line up to the second slot. In a plan view, a direction in which a tip end portion of the first branch line enters the first slot is opposite to a direction in which the extension portion extends in the first direction. In a plan view, a direction in which a tip end portion of the second branch line enters the second slot is opposite to a direction in which the extension portion extends in the first direction.
A digital phase shifter (100) includes a bend-type connection unit (e.g., a connection unit (20-1)) connecting a first digital phase shift circuit (e.g., a digital phase shift circuit (10-10)) located at an end portion of a first digital phase shift circuit group and a second digital phase shift circuit (e.g., a digital phase shift circuit (10-11)) located at an end portion of a second digital phase shift circuit group, and a capacitor (50) is connected in parallel to at least one of a first connection line of the connection unit (20), a position in the vicinity of a connection position between signal lines of two adjacent digital phase shift circuits (10) constituting the first digital phase shift circuit group, and a position in the vicinity of a connection position between signal lines of two adjacent digital phase shift circuits (10) constituting the second digital phase shift circuit group.
A digital phase shifter includes a first row, a second row arranged to extend in parallel to the first row, and a connection unit electrically connecting one ends of the first and second rows. Each of the first and second rows is configured by connecting a plurality of digital phase shift circuits in cascade, and each digital phase shift circuit includes an outer line and the like. For the digital phase shift circuits adjacent to each other in each of the first and second rows, outer lines adjacent to each other are separated, a first ground conductor and a second ground conductor adjacent to each other are separated, and positional relationships of the outer line to a signal line are reversed. A plurality of the outer lines included in the first row are not adjacent to a plurality of the outer lines included in the second row.
A digital phase shift circuit including a first ground conductor connected to one end of each of the two inner lines and the two outer lines, a second ground conductor connected to the other end of each of the two outer lines, and two electronic switches, one thereof being provided between the other end of one of the two inner lines and the second ground conductor, the other thereof being provided between the other end of the other of the two inner lines and the second ground conductor, the first ground conductor being configured of a plurality of conductive layers; and an output circuit including an output signal line connected to the signal line and configured to increase output impedance as compared with that of an input matching load connected to an input stage of the digital phase shift circuit.
A phased array antenna module includes an analog circuit portion that adjusts at least one of an intensity and a phase of a signal transmitted or received by each of a plurality of antenna elements, a digital control portion that controls the analog circuit portion, a strobe mechanism portion that is provided between the analog circuit portion and the digital control portion, latches a control signal output from the digital control portion when a strobe latch signal is input, and outputs the control signal to the analog circuit portion, a state determination portion that determines whether or not the control signal is in a fixed state, and a timing adjustment portion that outputs the strobe latch signal to the strobe mechanism portion when a ready signal is output from the state determination portion.
H01Q 3/34 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means
A superconducting wire includes: a superconductor laminate including a metal substrate and an oxide superconducting layer; and a stabilizing portion that covers the superconductor laminate and that has a thermal expansion coefficient larger than a thermal expansion coefficient of the metal substrate. The superconductor laminate has: a first main surface on which the oxide superconducting layer is disposed, and a second main surface on which the metal substrate is disposed. The stabilizing portion includes: a first portion facing the first main surface; and a second portion facing the second main surface. A thickness of the second portion is larger than a thickness of the first portion.
An optical connection structure includes a substrate, an optical integrated circuit, including a reception/emission portion that receives and emits an optical signal, that is electrically connected to the substrate, a microlens array including a first lens disposed at a position corresponding to the reception/emission portion, a ferrule including a fiber hole into which an optical fiber is inserted and a second lens into which an optical signal from the optical fiber is input, and a receptacle that holds the ferrule. The optical integrated circuit and the receptacle are fixed to the microlens array. The second lens faces the first lens when the receptacle holds the ferrule.
A temperature measuring device includes a heat pipe having a container in which a working fluid is enclosed, a temperature sensor that detects a temperature of the heat pipe, and a wire portion connected to the temperature sensor, in which the heat pipe receives heat from a plurality of heat sources.
An optical computing device includes an optical modulation element group including optical modulation elements. The optical modulation element group executes first optical computing with respect to a first signal light traveling along an optical path and second optical computing with respect to a second signal light traveling along the optical path in a direction opposite to a traveling direction of the first signal light.
An optical cable includes optical fiber units each including a bundle of optical fibers. The optical fiber units are twisted together in an S-Z configuration in which a twisting direction of the optical fiber units is reversed at a reversal part and an adjacent reversal part adjacent to the reversal part. A twisting angle, by which the optical fiber units are twisted in a circumferential direction between the reversal part and the adjacent reversal part, is 540 degrees or greater.
An optical fiber ribbon includes five or more optical fibers disposed in a disposition direction perpendicular to a longitudinal direction of the optical fiber ribbon and connection parts disposed intermittently in the longitudinal and disposition directions. Each of the connection parts is disposed between and connects adjacent ones of the optical fibers. The optical fiber ribbon has a first high-density region and a first low-density region disposed at different positions in the longitudinal direction and a second high-density region and a second low-density region disposed at different positions in the longitudinal direction. At least two of the connection parts having different positions from each other in the longitudinal and disposition directions are disposed in the first high-density region. At least another two of the connection parts having different positions from each other in the longitudinal and disposition directions are disposed in the second high-density region.
A light diffraction element includes microcells disposed along a plane and each of which includes subcells. Each of the subcells has a refractive index with respect to at least one of in-plane directions of the plane. The refractive index is one of n predetermined refractive indexes, where n is an integer of not less than 2.
G02F 1/29 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the position or the direction of light beams, i.e. deflection
B82Y 20/00 - Nanooptics, e.g. quantum optics or photonic crystals
A storage unit includes a wound body made of wound linear material and a storage body that stores the wound body. The wound body includes a first spiral part in which the wound linear material is spirally wound in a first winding direction such that a distance between the wound linear material of the first spiral part and a center of the wound body gradually decreases, a first inversion part, disposed inside the first spiral part, that inverts a winding direction of the wound linear material from the first winding direction to a second winding direction opposite to the first winding direction, and a second spiral part, disposed outside the first inversion part, in which the wound linear material is spirally wound in the second winding direction such that a distance between the wound linear material of the second spiral part and the center gradually increases.
A digital phase shifter of the present invention is a digital phase shifter in which digital phase shift circuits are cascade-connected, each of the digital phase shift circuits including a signal line, a pair of inner lines provided on both sides of the signal line, a pair of outer lines provided on outer sides of the inner lines, a first ground conductor connected to one ends of the inner lines and one ends of the outer lines, a second ground conductor connected to the other ends of the outer lines, and a pair of electronic switches provided between the other ends of the inner lines and the second ground conductors. The digital phase shift circuits include a multi-row structure constituted by a front row and a rear row, and an inter-row connection structure in which the outer line in the front row and the outer line in the rear row are connected, and the number of the digital phase shift circuits from an input end of an uppermost side digital phase shift circuit in the front row to an input end of an uppermost side digital phase shift circuit in the rear row is set such that a phase of a signal input to the front row uppermost side digital phase shift circuit and a phase of a signal input to the rear row uppermost side digital phase shift circuit are anti-phase with each other.
H01Q 3/38 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters the phase-shifters being digital
An optical fiber cable includes a core including optical fibers and a wrapping member that wraps the optical fibers, a sheath housing the core, and a rip cord disposed between the core and the sheath. A recessed portion is recessed inward in a radial direction of the core in the wrapping member. At least a portion of the rip cord is disposed inside the recessed portion.
An optical termination box includes a housing, a module case slidably attached in a front-rear direction with respect to the housing, a front adapter fixed to a front end of the module case, an adapter holder disposed on a rear end side of the module case, a rear adapter fixed to the adapter holder, and an optical fiber that connects the front adapter to the rear adapter. The adapter holder is fixed to a rear end portion of the housing such that the rear adapter is exposed rearward of the housing.
A ferrule includes: a ferrule main body having: a connection end surface, and fiber holes disposed in a first direction and through which optical fibers are inserted; and a protruding portion protruding from the ferrule main body in the first direction. The connection end surface faces forward in a longitudinal direction of the fiber holes. The protruding portion has a protruding-portion rear surface facing rearward in the longitudinal direction of the fiber holes. A distance in the longitudinal direction between the protruding-portion rear surface and the connection end surface is shorter than a distance in the longitudinal direction between the protruding-portion rear surface and a rear end of the ferrule main body.
A cold plate includes a main body in contact with a heat source. The main body has: an inflow hole through which a refrigerant flows in; an outflow hole through which the refrigerant flows out; and an internal space communicating with the inflow hole and the outflow hole and through which the refrigerant flows, and includes: a first heat exchange layer in the internal space; and a second heat exchange layer in the internal space. The first heat exchange layer and the second heat exchange layer are laminated in a thickness direction of the first heat exchange layer and of the second heat exchange layer.
F25B 41/48 - Arrangements for diverging or converging flows, e.g. branch lines or junctions for flow path resistance control on the downstream side of the diverging point, e.g. by an orifice
A digital phase shift circuit includes a signal line extending in a predetermined direction, two inner lines arranged to be separated from the signal line by a predetermined distance at both one side and the other side of the signal line, two outer lines provided at positions farther from the signal line than the inner lines at both the one side and the other side of the signal line, a first ground conductor electrically connected to one ends of the inner lines and the outer lines in the predetermined direction, and a second ground conductor electrically connected to the other ends of the outer lines in the predetermined direction. On both or one of the first ground conductor and the second ground conductor, a region between the outer line and the inner line is formed in a multilayer structure.
An optical computing device includes stacked light diffraction layers contained in a dried gel and each including microcells that have respective refractive indexes set individually and are disposed in a matrix form.
A power supply cable includes a heat pipe including a container and an insulating layer formed on an outer periphery of the container, and a plurality of power lines disposed radially outside the heat pipe and including conductive wires.
H01B 7/42 - Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
F28D 15/04 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes with tubes having a capillary structure
F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
A digital phase shifter includes a plurality of digital phase shift circuits connected in cascade and one or more bend-type connection units each configured to make a connection between two digital phase shift circuits of the plurality of digital phase shift circuits. Each of the digital phase shift circuits includes at least a signal line, a pair of inner lines provided at both sides of the signal line, a pair of outer lines provided outside of the inner lines, a first ground conductor connected to one ends of the inner lines and the outer lines, a second ground conductor connected to the other ends of the outer lines, and a pair of electronic switches provided between the other ends of the inner lines and the second ground conductor. Each of the digital phase shift circuits is a circuit set in a low-delay mode in which a return current flows through the inner line or a high-delay mode in which a return current flows through the outer line. The plurality of digital phase shift circuits connected in cascade are arranged in a spiral shape via the connection units.
An antenna substrate includes an antenna, a ground member arranged at an interval from the antenna in a thickness direction, and a feed line layer located between the antenna and the ground member in the thickness direction. An intermediate ground member electrically connected to the ground member and a feed line are arranged on the feed line layer. An excitation slit extending in a direction orthogonal to the thickness direction and a line slit extending in a direction orthogonal to both the direction in which the excitation slit extends and the thickness direction are formed in the intermediate ground member. The feed line is located inside of the line slit. The excitation slit extends to intersect the feed line as seen in the thickness direction.
A fiber laser includes: a gain fiber having a core doped with Yb; and a forward pumping light source group that generates forward pumping light that is inputted into the gain fiber and belongs to a 976-nm band. An absorption amount of the forward pumping light in a section of the gain fiber, calculated according to ∫P(λ)A(λ)dλ, is greater than or equal to 253 W and less than or equal to 1100 W where P(λ) [W] is a power spectrum of the forward pumping light, and A(λ) [%/m] is an absorption rate spectrum of the doped Yb. A length of the section is 1 m and includes an end face of the gain fiber on which the forward pumping light is incident.
H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
An optical fiber cutting device includes: a pair of grippers that grip an optical fiber having a glass portion exposed from the optical fiber; a gripping force applier disposed in one or both of the pair of grippers and that generates and changes a gripping force; a tension applier that applies tension to the optical fiber by separating the pair of grippers from each other in a longitudinal direction of the optical fiber; a tension measuring sensor that measures the tension; a controller that controls the gripping force; and a blade disposed between the pair of grippers in the longitudinal direction and that forms a scratch on the glass portion.
B26D 7/04 - Means for holding or positioning work with clamping means providing adjustable clamping pressure
B26D 1/08 - Cutting through work characterised by the nature or movement of the cutting memberApparatus or machines thereforCutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
B26F 3/00 - Severing by means other than cuttingApparatus therefor
G02B 6/25 - Preparing the ends of light guides for coupling, e.g. cutting
86.
Digital phase shift circuit and digital phase shifter
A digital phase shift circuit includes: a signal line that extends in a predetermined direction; a first inner line that is separated from a first side of the signal line; a second inner line that is separated from a second side of the signal line; an outer line that is provided at a position which is farther from the signal line than the first inner line or the second inner line on a first side or a second side; a first grounding conductor that is provided at each of first ends of the first inner line, the second inner line, and the outer line; a second grounding conductor that is provided at a second end of the outer line; a first electronic switch that is provided between a second end of the first inner line and the second grounding conductor; and a second electronic switch that is provided between a second end of the second inner line and the second grounding conductor.
A digital phase shift circuit includes: a signal line extending in a predetermined direction; two inner lines disposed on both one side and another side of the signal line and separated a predetermined distance from the signal line; two outer lines provided at positions which are farther from the signal line than the inner lines on both the one side and the other side; a first grounding conductor electrically connected to one end of each of the inner lines and the outer lines; and a second grounding conductor electrically connected to other ends of the outer lines, and the predetermined distance is set to be less than 10 μm.
H01Q 3/38 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters the phase-shifters being digital
A digital phase shifter in which a plurality of digital phase shift circuits are connected in cascade. One of the digital phase shift circuits includes at least a signal line, a pair of inner lines provided at both sides of the signal line, a pair of outer lines provided outside of the pair of inner lines, a first ground conductor connected to each first ends of the pair of inner lines and the pair of outer lines, a second ground conductor connected to each second ends of the pair of outer lines, and a pair of electronic switches provided between each of the second ends of the pair of inner lines and the second ground conductor. The pair of outer lines adjacent to each other are separated between the digital phase shift circuits adjacent to each other and the first ground conductor and the second ground conductor adjacent to each other are separated between the digital phase shift circuits adjacent to each other.
Output control method of radio communication module, manufacturing method of radio communication module and output control unit of radio communication module
An output control method for adjusting an output of a radio communication module includes a temperature adjustment step, a transmission step, a feedback control step, a measurement step, and an output control step. The temperature adjustment step sets a temperature of the radio communication module to a predetermined set temperature by a temperature adjusting mechanism. The transmission step has a first antenna transmit a radio signal by sending a transmission signal of a predetermined frequency to the radio communication module. The feedback control step controls an output of the transmission signal based on a comparative result between a power value obtained by detecting the transmission signal and a predetermined threshold value of power. The measurement step receives the radio signal by a second antenna, and measures an equivalent isotropic radiated power of the radio signal. The output control step adjusts an output of the transmission signal based on the equivalent isotropic radiated power measured in the measurement step.
A wireless module includes a first board having an antenna, the antenna transmitting and receiving a high frequency signal in a millimeter wave band, a second board handling a baseband signal with a lower frequency than the high frequency signal, and a housing including a cover and a case combined with each other and accommodating the first board and the second board, in which a passage portion that allows electromagnetic waves transmitted and received by the antenna to pass through is provided in the cover, and the first board is fixed to the cover while being in contact with the cover.
An optical fiber cable includes optical fibers, a wrapping tube that wraps around the optical fibers and contacts outermost ones of the optical fibers, and a sheath that covers the wrapping tube and has recesses on an inner circumferential surface of the sheath. The recesses are recessed toward a radially outer side of the optical fiber cable such that a space exists between the wrapping tube and the sheath in each of the recesses.
A wireless module includes: a first substrate including an antenna that transmits and receives high-frequency signals in a millimeter-wave band, a first high-temperature element that supplies high-frequency signals to the antenna being mounted on the first substrate; and a housing including a cover and a case combined with each other and housing the first substrate, the first substrate is in contact with the cover in an opposing direction in which the case and the cover oppose each other, the case includes a first heat dissipation part protruding toward the first high-temperature element, a first heat dissipation sheet is provided between the first heat dissipation part and the first high-temperature element in the opposing direction, and the cover and the first heat dissipation part compress the first heat dissipation sheet and the first substrate in the opposing direction.
A semiconductor package includes an RFIC chip, a mold resin that surrounds the RFIC chip in a planar view, a plurality of solder bumps, and a plurality of redistributors that connect the RFIC chip to the plurality of solder bumps, wherein a first bump group disposed in a position that overlaps with the RFIC chip in the planar view, and a second bump group disposed in a position that overlaps with the mold resin in the planar view are included in the plurality of solder bumps, in the second bump group, at least a high frequency bump connected to a high frequency terminal of the RFIC chip, and a GND bump connected to a GND terminal of the RFIC chip are included, and a minimum pitch in the second bump group is larger than a minimum pitch in the first bump group.
A manufacturing method for manufacturing an optical fiber ribbon, the manufacturing method includes intermittently forming, with a connecting device, connection parts between optical fibers measuring a load of the connecting device during the intermittent forming of the connection parts, and detecting an abnormality based on the load.
G02B 6/44 - Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
A digital phase shifter includes: a plurality of digital phase shift circuits connected in a cascade manner, wherein each of the plurality of digital phase shift circuits includes a signal line, two inner lines provided on two sides of the signal line, two outer lines provided on outer sides of the inner lines, a first grounding conductor connected to one end of each of the inner lines and the outer lines, a second grounding conductor connected to other ends of the outer lines, and two electronic switches provided between other ends of the inner lines and the second grounding conductor, and is set to a low-delay mode in which return currents flow in the inner lines or a high-delay mode in which return currents flow in the outer lines, and wherein the digital phase shifter includes: a phase shift quantity moderator that moderates unevenness of a phase shift quantity of an uneven digital phase shift circuit of the plurality of digital phase shift circuits, of which the phase shift quantity is uneven with respect to those of other digital phase shift circuits of the plurality of digital phase shift circuits.
An imaging device includes: an optical computing section that receives a first optical signal and generates a second optical signal including a feature amount extracted from the first optical signal; an image sensor that converts the second optical signal into a first electric signal including a piece of image information; and a computer that receives the first electric signal and generates second electric signals using machine learning models, each of the second electric signals corresponding to a respective one of the machine learning models, wherein: each of the second electric signals, generated from the first electric signal including the same piece of image information, includes different image information.
H04N 23/95 - Computational photography systems, e.g. light-field imaging systems
H04N 23/80 - Camera processing pipelinesComponents thereof
H04N 25/40 - Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled
An optical fiber ribbon includes: optical fibers disposed side by side in a predetermined direction; and connecting portions that connect two adjacent ones of the optical fibers. A peripheral resin portion is formed on a periphery of the optical fibers. An arithmetic mean roughness Ra of a surface of the peripheral resin portion is 0.41 μm or lower. A ten-point mean roughness Rz of a surface of the peripheral resin portion is 1.4 μm or lower.
An optical fiber manufacturing method includes supplying power to a drawing furnace to cause T/V to decrease to Ttarget/Vtarget along a quadratic function having a value of the Ttarget/Vtarget at an apex with lapse of time, where T is a tension applied to an optical fiber when an optical fiber preform is heated by the drawing furnace and the optical fiber is drawn, V is speed of withdrawing the optical fiber when the optical fiber is heated by the drawing furnace and the optical fiber is drawn, Ttarget is a target value of the tension, and Vtarget is a target value of the speed.
A connecting portion includes a first connection line configured to connect a signal line of a first digital phase shift circuit and a signal line of a second digital phase shift circuit, second connection lines configured to connect inner lines of the first digital phase shift circuit and inner lines of the second digital phase shift circuit, ground layers disposed above and below the first connection line and the second connection lines, and first via holes configured to connect at least the second connection lines and the ground layers.
INTERNATIONAL BUSINESS MACHINES CORPORATION (Japan)
Inventor
Uemichi, Yusuke
Sadhu, Bodhisatwa
Plouchart, Jean-Olivier
Abstract
A splitter-combiner includes a first quarter-wave line, a second quarter-wave line, an absorption resistance, a combining terminal, and a line bending circuit. The line bending circuit includes a line parallel region and a line bending region. The line parallel region has the first quarter-wave line and the second quarter-wave line. The first quarter-wave line and the second quarter-wave line are parallel to each other in the line parallel region. The line bending region has the first quarter-wave line and the second quarter-wave line. The first quarter-wave line and the second quarter-wave line are bent in the same direction as each other in the line bending region.
patents
