An underwater equipment and a communication system are provided. The underwater equipment includes an optical fiber, a conventional pump laser configured to provide pump light to an optical amplification unit and a backup pump laser configured to, when output power of the conventional pump laser is less than a target output power, perform output power compensation, and to perform output power compensation when aging value of the underwater equipment is greater than a first threshold value or aging value of a connected line or optical device thereof is greater than a second threshold value. By providing the underwater equipment with backup pump laser, pump output power of the underwater equipment can be compensated by starting the backup pump laser when the conventional pump laser is aging, or compensation is performed when the submarine cable optical fiber and other optical device of the underwater fiber communication system are aging.
A heat dissipation device for an underwater equipment is provided. The heat dissipation device includes a heat dissipation shell coaxially arranged around outside of the underwater equipment and a water permeating component. The heat dissipation shell includes a cylindrical shell body. The water permeating component has a conical structure and is provided with multiple first water inlets, and is arranged at two ends of the heat dissipation shell and is connected with the shell body to form a heat dissipation chamber together with the shell body and the housing of the underwater equipment. Through the above structure, heat generated by the underwater equipment can be dissipated through the liquid in the heat dissipation chamber and the heat dissipation shell after the underwater equipment is buried, and thus the heat dissipation efficiency for the underwater equipment buried under the silt in the shallow water area can be improved.
The present application discloses a data secrecy method for a submarine cable system with a failure and a submarine cable system. The method includes: determining a first disaster tolerance set in response to that a failure occurs to a first branch; and replacing a target optical signal in a first optical signal with a virtual optical signal. The first branch is any branch in the submarine cable system. The first disaster tolerance set includes at least one wavelength used for optical signals for transfer from a first terminal station to the first branch. The first optical signal is an optical signal output from the first terminal station. The target optical signal includes optical signals corresponding to the respective wavelengths in the first disaster tolerance set. The virtual optical signal is an optical signal that does not carry data content.
H04J 14/02 - Wavelength-division multiplex systems
H02G 1/10 - Methods or apparatus specially adapted for installing, maintaining, repairing, or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle in or under water
Embodiments of the present application provide a submarine optical cable system for reducing the complexity of the submarine optical cable system. The submarine optical cable system comprises a first trunk station, a second trunk station, a branch station, first XC equipment, second OXC equipment, a trunk fiber set and a branch fiber. The trunk fiber set at least comprises a first trunk fiber and a second trunk fiber. The branch station is connected with the second trunk fiber arranged between the first OXC equipment and the second OXC equipment through the branch fiber. The first trunk station is configured for sending a first service through a first transmission channel in a first transmission channel set and sending a second service through a second transmission channel in a second transmission channel set. The first OXC equipment is configured for transferring the first transmission channel to the second trunk fiber. The branch station is configured for uploading or downloading the first service and the second service through the second trunk fiber. The second OXC equipment is configured for transferring the transferred first transmission channel to the first trunk fiber.
This application discloses a submarine cable fault determining method and apparatus for realizing detecting whether a fault occurs to a submarine cable, without depending on TTE. The submarine cable fault determining method includes: receiving, by a network management system, first detection information from a first device during a first preset time, and receiving second detection information from a second device during a second preset time, where the second detection information is used to indicate whether the second device receives a first heartbeat signal from the first device through a submarine cable, and the first detection information is used to indicate whether the first device receives a second heartbeat signal from the second device through the submarine cable; and determining, by the network management system based on the first detection information and the second detection information, whether a fault occurs to the submarine cable between the first device and the second device.
H04B 10/077 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
Disclosed is a submarine network device, comprising a fiber set, a pump laser set, an erbium doped fiber amplifier (EDFA) set, a primary fiber coupler (CPL) set and a secondary CPL set, wherein the primary CPL set comprises N primary CPLs, the secondary CPL set comprises N secondary CPLs, with N being an integer greater than or equal to 3. The fiber set is configured to connect the pump laser set, the primary CPL set, the secondary CPL set and the EDFA set. An input port of each primary CPL in the primary CPL set is at least connected with a pump laser. An output port of each secondary CPL in the secondary CPL set is at least connected with an EDFA. Output ports of each primary CPL in the primary CPL set are respectively connected with two different secondary CPLs that are spaced by a secondary CPL, and input ports of each secondary CPL in the secondary CPL set are respectively connected with two different primary CPLs that are spaced by a primary CPL.
H01S 3/30 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
Embodiments of the present disclosure provide an optical repeater and an optical fiber communications system. An implementation solution of the optical repeater includes: a first input end of the optical repeater, a first output end of the optical repeater, a first erbium doped fiber, a first coupler, a second coupler, and a first pump light processing component, where the first input end of the optical repeater is connected to an input end of the first erbium doped fiber, an output end of the first erbium doped fiber is connected to an input end of the first coupler, a first output end of the first coupler is connected to a first input end of the second coupler, and an output end of the second coupler is connected to the first output end of the optical repeater.
H04B 10/00 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
H04B 10/291 - Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
An optical add/drop multiplexer branching apparatus is provided in the embodiments of the present invention, where the optical add/drop multiplexer branching unit includes: a trunk input end, a branch input end, a trunk output end, a branch output end, an optical add/drop multiplexer, a first coupler, a first detection circuit, and a control circuit, where the optical add/drop multiplexer includes an optical switch. A detection circuit detects whether a fault occurs in a trunk, and in a case in which a fault occurs in the trunk, a working mode is switched from a first working mode to a second working mode, to implement automatic redundancy on the trunk and ensure normal communication on a branch.
H04J 14/02 - Wavelength-division multiplex systems
H04B 10/25 - Arrangements specific to fibre transmission
H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water
H04Q 11/00 - Selecting arrangements for multiplex systems
An optical add-drop multiplexer and a branching unit are provided, where implementation of the optical add-drop multiplexer includes: an optical processing component, a first combining device, a second combining device, and a second scrambler, where the optical processing component includes an input end, a first output end, a second output end, and a third output end; the first output end of the optical processing component is connected to a first input end of the second combining device, and the second output end of the optical processing component is connected an input end of the second scrambler; an output end of the second scrambler is connected to a second input end of the second combining device; and the third output end of the optical processing component is connected to a first input end of the first combining device.
Embodiments of the present invention provide a reconfigurable optical add-drop multiplexer apparatus, and relate to the field of communications, so as to solve the problem of inconvenient line failure detection. The ROADM apparatus includes: a first ROADM, a second ROADM, one splitting coupler, four optical amplifiers, and four couplers. The embodiments of the present invention are used in a communications line architecture.
H04J 14/02 - Wavelength-division multiplex systems
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
A communications device is disclosed and includes: a first acquiring unit for acquiring first specific wavelength light and second specific wavelength light from a first optical path; a first receiving unit for converting the first specific wavelength light coming from the first acquiring unit into a first electrical signal; a first control unit for sending a first modulating signal to a first loopback unit according to the first electrical signal coming from the first receiving unit; and the first loopback unit for modulating the second specific wavelength light coming from the first acquiring unit according to the first modulating signal, and looping the modulated second specific wavelength light back to a second optical path, where a transmission direction of an optical signal in the second optical path is opposite to a transmission direction of an optical signal in the first optical path. The present invention further discloses a communications method.
H04B 10/077 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
H04B 10/035 - Arrangements for fault recovery using loopbacks
H04B 10/291 - Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water
12.
Method, transport apparatus, and system for detecting submarine optical cable line
A method for detecting a submarine optical cable line includes: splitting a detection signal input to a first optical functional unit in an optical functional module of an optical cable line into a first detection signal and a second detection signal; directly coupling and looping back the first detection signal to an output end of a second optical functional unit in a direction opposite to the first optical functional unit to constitute a first loopback path, and outputting a first detection loopback signal; looping back the second detection signal passing through the first optical functional unit to the output end of the second optical functional unit to constitute a second loopback path, and outputting a second detection loopback signal; and detecting a status of the submarine optical cable line according to power of the first detection loopback signal and power of the second detection loopback signal.
H04B 10/00 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
H04B 10/077 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water
H04B 10/071 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
13.
Insulation pressure-resistance cylinder body of submarine cable equipment, submarine cable equipment, and manufacturing method
An insulation pressure-resistant cylinder body of submarine (undersea) cable equipment, submarine cable equipment, and a manufacturing method are provided. The insulation pressure-resistant cylinder body includes: an installation cylinder, an insulation layer, and a pressure-resistant cylinder, disposed sequentially from inside to outside, where a first groove is opened on an outer surface of the installation cylinder, and a second groove is opened on an inner surface of the pressure-resistant cylinder, the second groove is interlaced with the first groove, and the insulation layer is closely adhered to the outer surface of the installation cylinder and the inner surface of the pressure-resistant cylinder. Through the interlaced grooves on the outer surface of the installation cylinder and on the inner surface of the pressure-resistant cylinder, the insulation layer, the installation cylinder, and the pressure-resistant cylinder are closely and integrally combined, thereby improving stability of the cylinder body.
The present invention provides a sealed optoelectronic isolation connection device which comprises an insulation cylinder, an optical fiber sealing device, and a conduit sealing device; the insulation cylinder is configured to insulate the conduit sealing device and the optical fiber sealing device; the conduit sealing device is provided with a conduit hole, which is configured to accommodate a conduit of an optical cable and sealing the conduit; the optical fiber sealing device is provided with multiple optical fiber holes, which are configured to accommodate optical fibers of the optical cable and sealing the optical fibers; and the optical fiber sealing device and the conduit sealing device are inserted in sequence into the insulation cylinder and seal the insulation cylinder. The device enhances the reliability of the sealed optoelectronic isolation connection device.
The embodiments of the present invention relate to optical communication technologies, and provide a method, an apparatus, and a unit for detecting a fault of a submarine device. The apparatus includes: a pair of optical couplers that are respectively set on two optical cables for transmitting optical signals in opposite direction and are configured to receive or send optical detection signals through the optical cables, where: the two optical couplers are connected through an optical fiber that transmits an optical detection signal, and a photosensitive component is set on the optical fiber and is configured to adjust an optical parameter of the optical detection signal by perceiving change of an ambient environment state parameter when a fault occurs. The embodiments of the present invention bring benefits of detecting whether a target submarine device is faulty, and locating a cause for the fault of the submarine device accurately.
H04B 10/08 - Equipment for monitoring, testing or fault measuring
H04B 10/077 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
16.
Method for monitoring fiber line state, repeater, submarine cable system
The present invention relates to communications technologies, and discloses a method for monitoring the state of a fiber line, a repeater, and a submarine cable system. The repeater includes a first optical amplifier (OA), a second optical amplifier, a first gating unit, a second gating unit, a first coupler, a second coupler, a third coupler, and a fourth coupler. The first coupler, the fourth coupler, and the first gating unit form an in-to-in loopback path between the input end of the first OA and the input end of the second OA; and the second coupler, the third coupler, and the second gating unit form an out-to-out loopback path between the output end of the first OA and the output end of the second OA.
A method is provided for locating a fault in one or more optical amplifiers operating in saturation and located along an optical transmission path. The method begins by generating a coherent optical time domain reflectometry (COTDR) trace representing a backscattered and/or reflected optical power level along the transmission path and comparing the trace to a reference trace to generate a difference trace that represents a change in gain. The change in gain is assigned to at least one of the optical amplifiers based on the difference trace. The method comprises assigning the difference trace to faults in the optical amplifiers, equating the difference trace with a linear combination of difference trace vectors each arising from a fault in a different one of the optical amplifiers, and iterating to determine a coefficient value associated with each difference trace vector. Each nonzero coefficient value denotes a fault in an optical amplifier.
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