CN113300197B - Relay light amplification system with pumping unit as center for multi-core optical fiber communication system - Google Patents
Relay light amplification system with pumping unit as center for multi-core optical fiber communication system Download PDFInfo
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- 238000005086 pumping Methods 0.000 title claims abstract description 78
- 239000013307 optical fiber Substances 0.000 title claims abstract description 49
- 238000004891 communication Methods 0.000 title claims abstract description 23
- 230000003321 amplification Effects 0.000 title claims abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 62
- 238000005057 refrigeration Methods 0.000 claims abstract description 38
- 239000002131 composite material Substances 0.000 claims abstract description 3
- 239000000835 fiber Substances 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 7
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- 238000012806 monitoring device Methods 0.000 claims description 4
- KWMNWMQPPKKDII-UHFFFAOYSA-N erbium ytterbium Chemical compound [Er].[Yb] KWMNWMQPPKKDII-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 2
- 230000033228 biological regulation Effects 0.000 abstract description 6
- 239000003638 chemical reducing agent Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
- H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/0014—Monitoring arrangements not otherwise provided for
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0404—Air- or gas cooling, e.g. by dry nitrogen
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- H—ELECTRICITY
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- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0405—Conductive cooling, e.g. by heat sinks or thermo-electric elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0407—Liquid cooling, e.g. by water
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/0915—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light
- H01S3/0933—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of a semiconductor, e.g. light emitting diode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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Abstract
The invention discloses a structure of a relay light amplification system taking a pumping unit as a center in a multi-core optical fiber communication system, which comprises a spot expander, the pumping unit, a doped optical fiber unit, a spot reducer and a temperature control unit; the pumping unit is provided with an interface group in the east-west-south-4 directions and is respectively connected with the other 4 devices or units; the optical signal from the input of the multi-core optical fiber is changed into a space division multi-path signal of a plurality of single-core optical fibers by the spot-expanding device and is introduced into the pumping unit, so that the combination of the signal light and the pumping light is realized; the combined space division optical signals are amplified by the doped optical fiber unit and then return to the pumping unit, the amplified optical signals are separated and sent to the spot shrinking device, and the spot shrinking device combines the space division multiplex signals of a plurality of optical fibers into a composite signal of a multi-core optical fiber to be output; the pump laser is a high-power laser, and adopts a centralized pumping, centralized temperature control and external refrigeration mode; and the temperature control unit is connected with the pump, so that the centralized regulation and control of the temperature are realized, the pumping efficiency is improved, and the energy consumption and the cost are reduced.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to a relay light amplification system of a multi-core multi-mode high-speed optical fiber communication system.
Background
With the development of high-speed communication systems, the optical channel resources with wavelengths as basic units are almost exhausted, and so-called multidimensional communication (multi-core, multi-mode, angular momentum multiplexing, and the like) is the inevitable choice of the next high-speed large-capacity communication system. One of the important development directions is to use a multi-core structure in one optical fiber, and each core uses multi-mode multiplexing, and such an optical fiber that realizes multiple cores and multiple modes is called a multi-core multi-mode optical fiber. By using the multi-core multi-mode optical fiber, the transmission capacity of a single optical fiber is greatly increased, and an ultra-long high-capacity communication system with 1000 kilometers of P bit (1015 bits) enters an experimental stage at present, indicating that the multi-core multi-mode high-speed optical fiber communication system with ultra-large capacity (hereinafter referred to as a multi-core optical fiber communication system) enters a commercial stage. At present, 7-core multi-mode commercial optical fibers are provided, and 19-core optical fibers also enter a field test stage; however, in the design of 1000km system, one relay station is added every 80km, so that the 1000km system can be realized only by passing through about 12 relay stations.
At each relay station, optical amplification is the most basic function. When fibers are added to dozens of cores, each fiber requires the addition of a doped fiber amplifier, perhaps more than 10, and the layout, power consumption and temperature control of these amplifiers become a serious problem.
First is how to assemble these numerous amplifiers together. One idea is to make each amplifier as a single plate, which is the conventional design idea. The method has the disadvantages that the pumping sources are dispersed, each pumping laser is an independent butterfly-shaped packaged semiconductor laser, and the packaged laser has the advantages that the output power is not high and can only reach 500mW generally, the electro-optic conversion efficiency is lower than 30 percent, and the price is high; meanwhile, the refrigerator and the temperature measuring resistor are packaged together with the laser chip, the refrigeration efficiency is low, the refrigeration power needs 2W each, and each laser needs an independent regulation and control system, so that power supply management and temperature regulation and control are inconvenient. The problem is not significant when the number of lasers is small, but when the number of pump lasers is increased, for example, when the number of cores reaches more than 7, the number of pump lasers can reach more than 14, and when the number of cores reaches 19, the number of pump lasers can reach 38. Therefore, the pumping mode has low electro-optic conversion efficiency and refrigeration efficiency of pumping light, and causes great waste; and many lasers are inconvenient to manage and complex in system.
At present, high-power pump lasers with power of tens of watts or more than one hundred watts are supplied with commodities, and the electro-optical conversion efficiency of the high-power pump lasers reaches 50%, so that a plurality of doped optical fibers can be pumped by adopting a single pump laser or a small amount of pump lasers, and a special temperature measurement system and a special heat dissipation system are adopted, so that the refrigeration efficiency can be improved, and the complexity of temperature control can be reduced.
Disclosure of Invention
The invention aims to provide a novel structure of a relay light amplification system of a multi-core multi-mode high-speed optical fiber communication system, and aims to solve the technical problems that in the prior art, a plurality of small pump lasers are low in photoelectric conversion efficiency, low in refrigeration efficiency of the pump lasers and the like, energy consumption is high, and the temperature control and refrigeration circuits of the plurality of pump lasers are complicated.
In order to achieve the above object, the present invention provides a relay light amplification system of a multi-core multi-mode high-speed optical fiber communication system (for short, a multi-core optical fiber communication system) using a pumping unit as a center and adopting a high-power laser to pump in a centralized manner and an external refrigeration system, comprising:
the device comprises a light spot expanding device (short for a spot expanding device), a pumping unit, an erbium-doped optical fiber unit, a light spot shrinking device (short for a spot shrinking device) and a temperature control unit, wherein the pumping unit is provided with 4 direction interface groups: the input interface group is called as a west input interface group, an east output interface group, a north output interface group and a south input interface group; the optical signal input by a single external multi-core multi-mode fiber is changed into a space division multi-path signal output of a plurality of single-core fibers through the spot expander, and the space division signal is introduced into the pumping unit through the west-direction input interface group to realize the combination with the pumping light; then the space division optical signal combined with the pump light enters the doped optical fiber unit through the northbound output interface group to obtain optical amplification, and the amplified space division multipath optical signal returns to the pump unit through the northbound input interface group; the separation of the residual pump light and the amplified optical signals is realized in the pumping unit, then the residual pump light and the amplified optical signals are connected with the input end of the speckle reducer through the east output interface group, and finally the space division multiplex signals of a plurality of optical fibers are combined into a multi-core optical fiber composite signal through the speckle reducer to be output.
The pumping unit also comprises a watt-level high-power laser, a few (such as 2) pumping lasers are adopted to realize the pumping of a plurality of (more than 7) doped optical fibers, and a centralized temperature control and external refrigeration mode is adopted;
wherein, the doped fiber unit comprises one of erbium-doped fiber or ytterbium-erbium co-doped fiber as gain medium for light amplification.
Further, the pumping unit further comprises a front pumping unit; the front pump unit comprises a first group of optical isolators, a plurality of wavelength division multiplexers, a first high-power pump laser and an optical splitter, wherein each input end of the first group of optical isolators corresponds to one port of a west-direction input interface group of the pump unit, the output ends of the first group of optical isolators are connected with the first input end of the wavelength division multiplexer, and the output ends of the first group of optical isolators are connected with the opposite ports of a north-direction output interface group of the pump unit; the first high-power pump laser is connected with the input end of the optical splitter, and the output end (splitting end) of the optical splitter is respectively connected with the corresponding port of the second input end of the wavelength division multiplexer.
Further, the pumping unit further comprises a rear pumping unit; the rear pump unit comprises a plurality of wavelength division demultiplexers, a multi-input combiner, a second pump laser and a second group of optical isolators, wherein the input end of each wavelength division demultiplexer is connected with the input end of the northbound interface group of the pump unit, the first output port of each wavelength division demultiplexer is connected with the input end of the optical isolator, the second output port of each wavelength division demultiplexer is connected with the input end of the multi-input combiner, the combining end of each multi-input combiner is connected with the output end of the pump laser, and the output ends of the second group of optical isolators are connected with the corresponding ports of the northbound output interface group of the pump unit.
Furthermore, the pumping unit further comprises an external refrigerating system, the refrigerating system comprises a temperature measuring element and a refrigerating element, temperature information measured by the temperature measuring element is transmitted to the temperature control circuit through a southbound output interface group of the pumping unit, and refrigerating current of the refrigerating element is controlled by the temperature control circuit through a southbound input interface group. The refrigeration element is one of a semiconductor refrigerator, air cooling and water cooling, or the combination of the semiconductor refrigerator, the air cooling and the water cooling, so that the temperature of the pump laser is controlled in a centralized manner, and the refrigeration efficiency is improved.
Furthermore, the multiple ends of the combiner and the splitter are provided with adjustable attenuators for adjusting the gain of the doped fibers so as to realize the gain balance of different doped fibers.
Furthermore, a south output interface group of the pumping unit is connected with the temperature control unit, temperature information of the high-power laser in the pumping unit is transmitted to the temperature control unit, the temperature control unit adjusts the current of the pumping laser and transmits the current to an external refrigeration system of the laser through the south input interface group, and temperature centralized regulation and control of a relay light amplification system of the multi-core multi-mode high-speed optical fiber communication system are achieved.
Furthermore, the temperature control unit further comprises a main controller for monitoring the current and the temperature of the pumping laser, and the information output ends of the current and temperature monitoring devices are electrically connected with the southward output interface group of the pumping unit.
The invention has the beneficial effects that:
(1) The layout of the interfaces in four directions with the pumping unit as the center is adopted, the interfaces are clearly defined, and the standardization is convenient to realize;
(2) The high-power laser is used as a pumping source, so that the conversion efficiency is high, the energy is saved, and the heating is reduced;
(3) The refrigeration system is separated from the laser, and the internal refrigeration of the laser is changed into the external refrigeration, so that the cost is reduced, the refrigeration efficiency is improved, and the energy is saved and the consumption is reduced;
(4) The centralized temperature control system reduces the complexity of the regulation and control system, and enables the regulation and control to be convenient and easy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a relay optical amplification system of the multi-core optical fiber communication system of the present invention, which takes a pumping unit as a center and adopts a high-power laser to pump in a centralized manner.
FIG. 2 is a schematic diagram of the structure of the pumping unit of the present invention
FIG. 3 is a schematic view of the front pump unit of the present invention
FIG. 4 is a schematic view of the rear pump unit of the present invention
Reference numerals are as follows:
in FIG. 1:
1-inputting a multi-core multi-mode fiber; 2-a light spot expander; 3-a pumping unit; 4-doped fiber unit; 5-a light spot shrinking device; 6-output multi-core multimode fiber; 7-a temperature control unit; 31-west input interface group of pumping unit; 32-north direction output interface group of pumping unit; 33-north direction input interface group of pumping unit; 34-east output interface group of pumping unit; 35-south output interface group of pumping unit; 36-south input interface group of pumping unit;
in fig. 2:
37-a front pump unit; 38-rear pump unit; 39-external refrigeration system;
in FIG. 3:
371 — first set of optical isolators (same below); 372-a wavelength division multiplexer; 373-a first high power pump laser; 374-optical splitter; 3721-first input terminal of wavelength division multiplexer, 3722-output terminal of wavelength division multiplexer; 3723-a second input of the wavelength division multiplexer;
in fig. 4:
381-wavelength division demultiplexer; 382-a second high power pump laser; 383-a second set of optical isolators; 384-multi-way optical combiner;
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
the device comprises an input multi-core multi-mode fiber 1, a light spot expander 2, a pumping unit 3, an erbium-doped fiber unit 4, a light spot reducer 5 and an output multi-core multi-mode fiber 6; the pumping unit is provided with a west input interface group 31, a north output interface group 32, a north input interface group 33, a west output interface group 34, a south output interface group 35 and a south input interface group 36; the input end of the light spot expanding device 2 corresponds to the input multi-core multi-mode fiber 1, the output end of the light spot expanding device 2 corresponds to the west input interface group 31 of the pumping unit 3, the north output interface group 32 of the pumping unit 3 corresponds to the input end of each fiber of the doped fiber unit 4, the output end of the erbium-doped fiber unit 4 is connected with the corresponding port of the north input interface group 33 of the pumping unit 3, the east output interface group 34 of the pumping unit 3 corresponds to the input end of the light spot shrinking device 5, and the output end of the light spot shrinking device 5 corresponds to the input end of the output multi-core multi-mode fiber 6.
The device also comprises a temperature control unit 7, wherein the pumping unit 3 is connected with the temperature control unit through a southward output interface group and is used for transmitting temperature measurement information of the pumping laser; the output end of the temperature control unit is connected with the south input interface group of the pumping unit 3, and the temperature control circuit controls the pumping current and the refrigerating current of the pumping unit according to the control requirement
Wherein the pumping unit is further provided with a front pump unit 37; the front pump unit 37 comprises a first group of optical isolators 371, a plurality of wavelength division multiplexers 372, a first high-power pump laser 373 and an optical splitter 374, wherein each isolator input end of 371 in the first group of optical isolators corresponds to one port of the east-oriented interface group input end 31 of the pump unit 3, the output end of each isolator in the first group of optical isolators 371 is connected with a first input end 3721 of the wavelength division multiplexer, the output end 3722 of the wavelength division multiplexer is connected with the corresponding port of the north-oriented output end 32 of the pump unit 3, the second input end 3723 of the wavelength division multiplexer corresponds to the output end of the optical splitter 374, and the input end of the optical splitter 374 is connected with the output end of the first high-power pump laser 373; the pump laser 373 is placed in the refrigeration environment of the external refrigeration system 39.
Wherein the pumping unit further comprises a rear pumping unit 38; the rear pump unit comprises a plurality of wavelength division demultiplexers 381, a second high-power pump laser 382, a second group of optical isolators and a multi-path optical combiner 384; an input port 3811 of the wavelength division demultiplexer 381 is connected to a corresponding port of the northbound interface group input port 33 of the pump unit, a first output port 3812 of the wavelength division demultiplexer 381 is connected to an input port of an isolator corresponding to the second group of optical isolators 383, and a second output port 3813 of the wavelength division demultiplexer 381 is connected to a corresponding input port of the multi-path optical combiner 384; the output port of the multi-path optical combiner 384 is connected to the output end of the second high-power pump laser 382, and the output end of the nth isolator 383 in the second set of optical isolators is connected to the corresponding port of the east output interface set 34 of the pump unit 3. The second high power pump laser 382 is placed in the refrigeration environment of the external refrigeration system 39.
The pumping unit 3 is further provided with an external refrigeration system 39, the refrigeration system 39 comprises a temperature measuring element and a refrigeration element, temperature information measured by the temperature measuring element is transmitted to the temperature control unit 7 through a south-direction output interface group 35 of the pumping unit, and refrigeration current of the refrigeration element is controlled by the temperature control circuit through a south-direction input interface group 36. The refrigeration element is one of a semiconductor refrigerator, air cooling and water cooling, or the combination of the semiconductor refrigerator, the air cooling and the water cooling, so that the temperature of the pump laser is controlled in a centralized manner, and the refrigeration efficiency is improved.
The temperature control unit 7 further comprises a master controller, current monitoring devices are arranged on the pump lasers, and information output ends of the current monitoring devices are electrically connected with information input ends of the master controller.
[ example 2 ]
Referring to fig. 1 to 4, the same contents as those in embodiment 1 are different in that:
in the front pump unit 37 of the pump unit 3, an adjustable optical attenuator for adjusting the gain of the doped fiber is arranged between the optical splitter 374 and the second input end 3723 of the wavelength division multiplexer 372, so as to realize the balance of different fiber core amplification gains;
in the rear pump unit 38 of the pump unit 3, a tunable optical attenuator is disposed between the optical combiner 384 and the second output port 3813 of the wavelength division demultiplexer 381, so as to implement the balance of the reverse amplification gains of different fiber cores;
while the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A multi-core optical fiber communication system is characterized by comprising a light spot expanding device, a pumping unit, a doped optical fiber unit, a light spot shrinking device and a temperature control unit, wherein the pumping unit is provided with interface groups in four directions of east, west, south and north and is respectively connected with the light spot expanding device, the doped optical fiber unit, the light spot shrinking device and the temperature control unit; a high-power pump laser is adopted for centralized pumping to replace distributed pumping of a plurality of low-power lasers; the input optical signal from a single multi-core optical fiber is changed into a space division multi-path signal output of a plurality of single-core optical fibers through the light spot expander, and the space division signal is introduced into the pumping unit through the west-direction input interface group to realize the combination with the pumping light; then the space division multiplex optical signal of the pump light and signal light combination enters the doped optical fiber unit through the north output interface group to obtain optical amplification, and the amplified space division multiplex optical signal returns to the pump unit through the north input interface group; the method comprises the steps that separation of the rest part of pump light and amplified optical signals is achieved in a pumping unit, then the pumping unit is connected with an input end of a light spot shrinking device through an east-direction output interface group, finally space division multiplex signals of a plurality of optical fibers are combined into a composite signal of a multi-core optical fiber through the light spot shrinking device to be output, the pumping unit further comprises a watt-level high-power laser to achieve pumping of a plurality of doped optical fibers, a centralized temperature control and external refrigeration mode is adopted, a south-direction output interface group of the pumping unit is connected with a temperature control unit, temperature information of the watt-level high-power laser in the pumping unit is transmitted to a temperature control circuit, the temperature control circuit adjusts current and refrigeration current of the pumping laser and transmits the currents to the laser and an external refrigeration system through a south-direction input interface group to achieve temperature centralized adjustment and control of a relay light amplification system of the multi-core optical fiber communication system, and the pumping unit further comprises a front pumping unit; the front pump unit comprises a first group of optical isolators, a plurality of wavelength division multiplexers, a first pump laser and an optical splitter, wherein the input end of the first group of optical isolators corresponds to one port of a west-direction input interface group of the pump unit, the output end of the first optical isolator is connected with the first input end of the wavelength division multiplexer, and the output end of the first optical isolator is connected with the opposite port of a north-direction output interface group of the pump unit; the pump laser is connected with the input end of the optical splitter, and the output end of the optical splitter is respectively connected with the corresponding port of the second input end of the wavelength division multiplexer.
2. The multi-core optical fiber communication system as claimed in claim 1, wherein the optical amplifier system comprises a pump unit as a center,
it is characterized in that the preparation method is characterized in that,
the pumping unit further comprises a rear pumping unit; the rear pump unit comprises a plurality of wavelength division demultiplexers, a multi-input combiner, a second pump laser and a second group of optical isolators, wherein the input end of each wavelength division demultiplexer is connected with the north input interface group of the pump unit, the first output port of each wavelength division demultiplexer is connected with the input end of the optical isolator, the second output port of each wavelength division demultiplexer is connected with the input end of the multi-input combiner, the combining end of the multi-input combiner is connected with the output end of the second pump laser, and the output ends of the second group of optical isolators are connected with the corresponding ports of the west output interface group of the pump unit.
3. The multi-core fiber communication system as claimed in claim 1, wherein the pump unit comprises an external refrigeration system, the refrigeration system comprises a temperature measuring element and a refrigeration element,
the temperature information measured by the temperature measuring element is transmitted to the temperature control circuit through a south-direction output interface group of the pumping unit, and the refrigerating current of the refrigerating element is controlled by the temperature control circuit through a south-direction input interface group; the refrigerating element is one of a semiconductor refrigerator, air cooling refrigeration and water cooling refrigeration, or the combination of the semiconductor refrigerator, the air cooling refrigeration and the water cooling refrigeration.
4. The multi-core optical fiber communication system as claimed in claim 2, wherein the optical amplifier system structure comprises a pump unit as a center,
the device is characterized in that the multiple ends of the combiner and the optical splitter are provided with adjustable attenuators which can balance the gains of different doped optical fibers.
5. The multi-core optical fiber communication system as claimed in claim 1, wherein the optical amplifier system comprises a pump unit as a center,
it is characterized in that the preparation method is characterized in that,
the doped optical fiber serving as the optical amplification gain medium in the doped optical fiber unit is one of an erbium-doped optical fiber or an ytterbium-erbium co-doped optical fiber.
6. The multi-core fiber communication system as claimed in claim 1, wherein the pump unit-centered repeater optical amplification system structure,
the temperature control unit comprises a main controller for monitoring the current and the temperature of the pump laser, and the information output ends of the current and temperature monitoring devices are electrically connected with the south output interface group of the pump unit.
Priority Applications (1)
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| CN110233413A (en) * | 2019-07-04 | 2019-09-13 | 深圳市镭神智能系统有限公司 | A kind of multi-Wavelength Pulses optical fiber laser and laser radar system |
| CN112152058A (en) * | 2020-10-22 | 2020-12-29 | 中国电子科技集团公司第三十四研究所 | Multi-input multi-output optical fiber amplifier |
| CN112468257A (en) * | 2021-01-28 | 2021-03-09 | 南京帕卓丽电子科技有限公司 | Optical channel add-drop multiplexer (OCADM) of multi-core multi-mode optical fiber communication system |
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| US10069271B2 (en) * | 2014-06-02 | 2018-09-04 | Nlight, Inc. | Scalable high power fiber laser |
| WO2019039590A1 (en) * | 2017-08-25 | 2019-02-28 | 日本電信電話株式会社 | Optical amplification repeating system, and optical amplifier |
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| CN110233413A (en) * | 2019-07-04 | 2019-09-13 | 深圳市镭神智能系统有限公司 | A kind of multi-Wavelength Pulses optical fiber laser and laser radar system |
| CN112152058A (en) * | 2020-10-22 | 2020-12-29 | 中国电子科技集团公司第三十四研究所 | Multi-input multi-output optical fiber amplifier |
| CN112468257A (en) * | 2021-01-28 | 2021-03-09 | 南京帕卓丽电子科技有限公司 | Optical channel add-drop multiplexer (OCADM) of multi-core multi-mode optical fiber communication system |
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