CN109451376A - A kind of backward remote gain unit and remote optical pumping amplifier - Google Patents
A kind of backward remote gain unit and remote optical pumping amplifier Download PDFInfo
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- CN109451376A CN109451376A CN201811385488.9A CN201811385488A CN109451376A CN 109451376 A CN109451376 A CN 109451376A CN 201811385488 A CN201811385488 A CN 201811385488A CN 109451376 A CN109451376 A CN 109451376A
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- division multiplexer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0016—Construction using wavelength multiplexing or demultiplexing
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Abstract
The embodiment of the present invention provides a kind of backward remote gain unit and remote optical pumping amplifier, wherein backward remote gain unit includes the first wavelength division multiplexer, the second wavelength division multiplexer, third wavelength division multiplexer, the 4th wavelength division multiplexer, the 5th wavelength division multiplexer and Er-doped fiber；Wherein, for receiving signal light, the first reflection end is connect the first transmission end with the second common end, one end connection of the first common end and Er-doped fiber；Second transmission end and the second reflection end are respectively used to receive bypass pump light；Third transmission end is connect with the 5th transmission end, and third reflection end is connect with the 4th common end, the other end connection of third common end and Er-doped fiber；4th transmission end is connect for receiving bypass pump light, the 4th reflection end with the 5th reflection end；5th common end is for receiving with road pump light and exporting amplified signal light.Backward remote gain unit and remote optical pumping amplifier provided in an embodiment of the present invention, realize two directional pump, can effectively extend unrepeatered transmission distance.
Description
Technical field
The present embodiments relate to technical field of photo communication more particularly to a kind of backward remote gain unit and distant pump to amplify
Device.
Background technique
With the construction of extra-high voltage alternating current-direct current power grid, the transmission range of substation and substation is increasingly longer.Due to extra-high
The area that straightening stream, alternating current circuit are passed through often has inconvenient traffic, and natural conditions are severe, and setting optic communication relay station is very difficult,
Construction investment is larger.Therefore, the optical fiber of several hundred kilometers or more is carried out using overlength span optical transport technology on extra high voltage line
Transmission has very important realistic meaning.
Distant pump amplifying technique can be applied in the non-relay optical transmission system of overlength span, for improving system power budget,
Extend transmission span.Remote optical pumping amplifier be similar to transmission link in passive line amplifier, can compare effectively improve it is non-relay
The transmission of system.
Currently, Remote optical pumping amplifier includes pumping and bypassing two kinds of pumping configurations of pumping with road, it is signal light with road pumping configuration
It is transmitted with pump light in same root fibre core；Bypass pumping configuration is that signal light and pump light are transmitted in two fibre cores.It is pumped with road
In the structure of Pu, Transmission system has certain limitation to pumping light intensity, and excessively high pump light can generate excited Brillouin and be excited to draw
The nonlinear effects such as graceful scattering, and after long distance transmission, with road pump light or pump light is bypassed to remote gain list
The power of member has been difficult to meet the requirement of pump power.Therefore conventional with road or the bypass extensible biography of remote gain unit
It is defeated apart from limited.
Summary of the invention
The embodiment of the present invention provides a kind of backward remote gain unit and remote optical pumping amplifier, to solve existing long-range increasing
Beneficial unit is extensible apart from limited problem.
In a first aspect, the embodiment of the present invention provides a kind of backward remote gain unit, including the first wavelength division multiplexer, second
Wavelength division multiplexer, third wavelength division multiplexer, the 4th wavelength division multiplexer, the 5th wavelength division multiplexer and Er-doped fiber；
Wherein, for the first transmission end of the first wavelength division multiplexer for receiving signal light, the first reflection end and the second wavelength-division are multiple
It is connected with the second common end of device, one end of the first common end and Er-doped fiber connects；
Second transmission end of the second wavelength division multiplexer and the second reflection end are respectively used to receive bypass pump light；
The third transmission end of third wavelength division multiplexer is connect with the 5th transmission end of the 5th wavelength division multiplexer, third reflection end
It is connect with the 4th common end of the 4th wavelength division multiplexer, the other end connection of third common end and Er-doped fiber；
4th transmission end of the 4th wavelength division multiplexer is for receiving bypass pump light, the 4th reflection end and the 5th wavelength-division multiplex
5th reflection end of device connects；
5th common end of the 5th wavelength division multiplexer is for receiving with road pump light and exporting amplified signal light.
Second aspect, the embodiment of the present invention provide a kind of backward remote optical pumping amplifier, including long-range increasing described in first aspect
Beneficial unit, and bypass pump unit and with road pump unit；Bypass pump unit is used to provide bypass for remote gain unit
Pump light is used to provide for remote gain unit with road pump light with road pump unit.
A kind of backward remote gain unit and remote optical pumping amplifier provided in an embodiment of the present invention, based on two-way bypass pumping
Light, by the first wavelength division multiplexer and the second wavelength division multiplexer to Er-doped fiber forward pumping, based on bypass pump light all the way and
It is anti-to Er-doped fiber by third wavelength division multiplexer, the 4th wavelength division multiplexer and the 5th wavelength division multiplexer all the way with road pump light
To pumping, two directional pump is realized, is able to extend the distance between remote gain unit and receiving end, while can further change
The optical signal to noise ratio of kind Remote optical pumping amplifier, to more effectively extend unrepeatered transmission distance.Further, since remote gain unit is by nothing
Source optical device and Er-doped fiber composition, stability is preferable, without power supply, there is no need to build relay station, later maintenance and
Monitoring, greatly reduces construction cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of backward remote gain unit provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of backward remote optical pumping amplifier provided in an embodiment of the present invention；
Fig. 3 be another embodiment of the present invention provides backward remote optical pumping amplifier structural schematic diagram；
Description of symbols:
The first wavelength division multiplexer of 11-；The second wavelength division multiplexer of 12-；13- third wavelength division multiplexer；
The 4th wavelength division multiplexer of 14-；The 5th wavelength division multiplexer of 15-；16- Er-doped fiber；
The first transmission end of 11a-；The first reflection end of 11b-；The first common end 11c-；
The second transmission end of 12a-；The second reflection end of 12b-；The second common end 12c-；
13a- third transmission end；13b- third reflection end；13c- third common end；
The 4th transmission end of 14a-；The 4th reflection end of 14b-；The 4th common end 14c-；
The 5th transmission end of 15a-；The 5th reflection end of 15b-；The 5th common end 15c-；
1- remote gain unit；2- bypasses pump unit；3- is with road pump unit；
21- first bypasses pump unit；22- second bypasses pump unit；23- third bypasses pump unit；
17- optoisolator.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
It, can based on the remote gain unit with road pumping configuration and bypass pumping configuration in current Remote optical pumping amplifier
The limited situation of extended transmission range, the embodiment of the invention provides a kind of backward remote gain units.Fig. 1 is the present invention
The structural schematic diagram for the backward remote gain unit that embodiment provides, as shown in Figure 1, backward remote gain unit includes first wave
Division multiplexer 11, the second wavelength division multiplexer 12, third wavelength division multiplexer 13, the 4th wavelength division multiplexer 14, the 5th wavelength division multiplexer
15 and Er-doped fiber 16；Wherein, the first transmission end 11a of the first wavelength division multiplexer 11 is for receiving signal light, the first reflection end
11b is connect with the second common end 12c of the second wavelength division multiplexer 12, and the first common end 11c is connect with one end of Er-doped fiber 16；
The the second transmission end 12a and the second reflection end 12b of second wavelength division multiplexer 12 are respectively used to receive bypass pump light；Third wavelength-division
The third transmission end 13a of multiplexer 13 is connect with the 5th transmission end 15a of the 5th wavelength division multiplexer 15, third reflection end 13b with
4th common end 14c connection of the 4th wavelength division multiplexer 14, third common end 13c are connect with the other end of Er-doped fiber 16；The
4th transmission end 14a of four wavelength division multiplexers 14 is for receiving bypass pump light, the 4th reflection end 14b and the 5th wavelength division multiplexer
15 the 5th reflection end 15b connection；5th common end 15c of the 5th wavelength division multiplexer 15 is for receiving with road pump light and exporting
Amplified signal light.
Specifically, backward remote gain unit includes five wavelength division multiplexers, for ease of description, above-mentioned five wavelength-divisions are answered
Use the first wavelength division multiplexer 11, the second wavelength division multiplexer 12, third wavelength division multiplexer 13, the 4th wavelength division multiplexer 14 respectively with device
It is indicated and distinguishes with the 5th wavelength division multiplexer 15.It should be noted that the wavelength division multiplexer in the embodiment of the present invention is
Three port wavelength division multiplexers, three ports are transmission end, reflection end and common end respectively.It should be noted that the present invention is implemented
In example, transmission end and reflection end are for indicating two input terminals of wavelength division multiplexer multiplex, the transmission end of same wavelength division multiplexer
It can be replaced mutually with reflection end, such as the 4th transmission end 14a of the 4th wavelength division multiplexer 14 bypasses pump light for receiving, the
Four reflection end 14b are connect with the 5th reflection end 15b of the 5th wavelength division multiplexer 15, can also be the of the 4th wavelength division multiplexer 14
Four reflection end 14b are for receiving bypass pump light, the 5th reflection end 15b of the 4th transmission end 14a and the 5th wavelength division multiplexer 15
Connection.In addition, backward remote gain unit further includes Er-doped fiber 16, Er-doped fiber 16 is one and is doped with a small amount of rare earth element
The optical fiber of erbium is the gain media of remote gain unit.
For the second wavelength division multiplexer 12, the second wavelength division multiplexer 12 includes the second transmission end 12a, the second reflection end 12b
With the second common end 12c.Wherein, the second transmission end 12a and the second reflection end 12b is used to receive bypass pump light, penetrates herein
The bypass pump light for entering the second transmission end 12a and the second reflection end 12b can be from same bypass pump unit, be also possible to
From different bypass pump units, the present invention is not especially limit this.Two-way bypass pump light injects the respectively
After two transmission end 12a and the second reflection end 12b, the multiplex in the second wavelength division multiplexer 12, and it is defeated by the second common end 12c
Out.Second common end 12c is connect with the first reflection end 11b of the first wavelength division multiplexer 11, i.e., after two-way bypass pumps photosynthetic wave
It is transmitted to the first reflection end 11b.
For the first wavelength division multiplexer 11, the first wavelength division multiplexer 11 includes the first transmission end 11a, the first reflection end 11b
With the first common end 11c.Wherein, the first transmission end 11a is for receiving signal light, and signal light refers to the industry of transmitting terminal transmission herein
Business signal light.First reflection end 11b is connect with the second common end 12c, for receiving after 12 multiplex of the second wavelength division multiplexer
Two-way bypass pump light.First common end 11c is connect with one end of Er-doped fiber 16, and the two-way after signal light and multiplex bypasses
Pump light multiplex in the first wavelength division multiplexer 11, and exported by the first common end 11c, positive pump is carried out to Er-doped fiber 16
Pu.
For the 5th wavelength division multiplexer 15, the 5th wavelength division multiplexer 15 includes the 5th transmission end 15a, the 5th reflection end 15b
With the 5th common end 15c.Wherein, the 5th transmission end 15a is for receiving amplified signal light, and amplified signal light passes through the
After five transmission end 15a enter the 5th wavelength division multiplexer 15, exported by the 5th common end 15c.In addition, the 5th common end 15c is also
For receiving with road pump light.After entering the 5th wavelength division multiplexer 15 by the 5th common end 15c with road pump light, the 5th
Partial wave in wavelength division multiplexer 15 is exported from the 5th reflection end 15b.5th reflection end 15b is connect with the 4th reflection end 14b, with road
Pump light enters the 4th wavelength division multiplexer 14 by the 4th reflection end 14b after the 5th reflection end 15b output.
For the 4th wavelength division multiplexer 14, the 4th wavelength division multiplexer 14 includes the 4th transmission end 14a, the 4th reflection end 14b
With the 4th common end 14c.Wherein, the 4th transmission end 14a injects the 4th transmission end 14a's for receiving bypass pump light herein
Same bypass pump unit can be come from the bypass pump light of the second transmission end 12a and the second reflection end 12b by bypassing pump light,
It is also possible to from different bypass pump units, the present invention is not especially limit this.4th reflection end 14b and
Five reflection end 15b connections, receive the 5th reflection end 15b output with road pump light.4th common end 14c and third reflection end
13b connection, by the bypass pump light of the 4th transmission end 14a input and by the 4th reflection end 14b input with road pump light
The multiplex in the 4th wavelength division multiplexer 14 is exported from the 4th common end 14c, and it is multiple to enter third wavelength-division by third reflection end 13b
With device 13.
For third wavelength division multiplexer 13, third wavelength division multiplexer 13 includes third transmission end 13a, third reflection end 13b
With third common end 13c.Wherein, third reflection end 13b is connect with the 4th common end 14c, defeated for receiving the 4th common end 14c
Bypass pump light after multiplex out and with road pump light.Third common end 13c is connect with the other end of Er-doped fiber 16, multiplex
It rear bypass pump light and is exported with road pump light by third common end 13c, backward pumping is carried out to Er-doped fiber 16.This
Outside, third common end 13c is also used to receive by the amplified signal light of Er-doped fiber 16, and amplified signal light is in third wave
It is exported after partial wave from third transmission end 13a in division multiplexer 13.Third transmission end 13a is connect with the 5th transmission end 15a, after amplification
Signal light by the 5th transmission end 15a enter the 5th wavelength division multiplexer 15, and from the 5th common end 15c export.
Remote gain unit provided in an embodiment of the present invention bypasses pump light based on two-way, passes through the first wavelength division multiplexer
11 and second wavelength division multiplexer 12 to 16 forward pumping of Er-doped fiber, based on bypassing pump light all the way and all the way with road pump light,
By third wavelength division multiplexer 13, the 4th wavelength division multiplexer 14 and the 5th wavelength division multiplexer 15 to 16 backward pumping of Er-doped fiber,
Two directional pump is realized, is able to extend the distance between remote gain unit and receiving end, while can further improve distant pump
The optical signal to noise ratio of system, to more effectively extend unrepeatered transmission distance.Further, since remote gain unit is by passive light device
Part and Er-doped fiber composition, stability is preferable, without power supply, there is no need to build relay station, later maintenance and monitoring, greatly
Construction cost is reduced greatly.
Based on the above embodiment, remote gain unit further includes optoisolator, optoisolator setting third transmission end with
Between 5th transmission end, the input terminal of optoisolator is connect with third transmission end, the output end of optoisolator and the 5th transmission end
Connection.
Specifically, optoisolator be nonreciprocity based on Faraday rotation realize only to allow a Unidirectional light to pass through passive
Optical device has the characteristics that high-isolation, filter with low insertion loss, can be improved light wave transmissions efficiency.In the third of third wavelength division multiplexer
Optoisolator is set between transmission end and the 5th transmission end of the 5th wavelength division multiplexer, so that third transmission end and the 5th transmission end
Between, the amplified signal light for only third transmission end being allowed to export is transmitted to the 5th transmission end, and reversed spontaneous radiation is isolated and makes an uproar
Sound.
Based on any of the above-described embodiment, the erbium ion concentration of Er-doped fiber is 2.5~3.0dB/m at 1530nm wavelength,
The numerical aperture of Er-doped fiber is 0.28~0.3, and the mode field diameter of Er-doped fiber is 4.2~4.6 μm at 1550nm wavelength, is mixed
The length of erbium optical fiber is 25~35m.
Herein, data aperture is used to characterize cone angle size when light enters Er-doped fiber, mode field diameter (Mode Field
Diameter, MFD) for being characterized in the distribution of the core region basic mode light of Er-doped fiber.
Based on any of the above-described embodiment, Fig. 2 is the structural schematic diagram of backward remote optical pumping amplifier provided in an embodiment of the present invention,
As shown in Fig. 2, backward remote optical pumping amplifier includes remote gain unit 1, and bypass pump unit 2 and with road pump unit 3；It is other
Road pump unit 2 is used to provide bypass pump light for remote gain unit 1, is used to be remote gain unit 1 with road pump unit 3
It provides with road pump light.
Specifically, remote gain unit 1 is the backward remote gain unit in any of the above-described embodiment, bypasses pump unit
2 for providing bypass pump light for remote gain unit 1, pumps for providing for remote gain unit 1 with road with road pump unit 3
Pu light.Further, the second transmission end 12a and the second reflection end 12b of second wavelength division multiplexer 12 are used in remote gain unit 1
Pump light is bypassed in receiving, for the 4th transmission end 14a of the 4th wavelength division multiplexer 14 for receiving bypass pump light, the 5th wavelength-division is multiple
With the 5th common end 15c of device 15 for receiving with road pump light.Therefore, accordingly, bypass pump unit 2 needs for second thoroughly
It penetrates end 12a, the second reflection end 12b and the 4th transmission end 14a and bypass pump light is provided, need with road pump unit 3 for the 5th public affairs
End 15c is provided with road pump light altogether.Herein, the bypass pump light that bypass pump unit 2 provides can come from same pumping source,
It can come from different pumping sources, such as include two pumping sources in bypass pump unit 2, one of pumping source is used to be the
Two transmission end 12a and the second reflection end 12b provide bypass pump light, another pumping source for the 4th transmission end 14a for providing
Pump light is bypassed, can also include three pumping sources, each pumping source corresponds to a port, and the embodiment of the present invention does not make this to have
Body limits.
Backward remote optical pumping amplifier provided in an embodiment of the present invention, including remote gain unit 1, bypass pump unit 2 and with
Road pump unit 3 is not changing existing transmission device and fibre circuit, by increasing a remote gain list in actual track
It is long away from span without electronic relay light amplification that large capacity can be realized in member 1.In remote gain unit 1, pump light is bypassed based on two-way,
By the first wavelength division multiplexer 11 and the second wavelength division multiplexer 12 to 16 forward pumping of Er-doped fiber, based on bypassing pump light all the way
All the way with road pump light, by third wavelength division multiplexer 13, the 4th wavelength division multiplexer 14 and the 5th wavelength division multiplexer 15 to mixing
16 backward pumping of erbium optical fiber, realizes two directional pump, is able to extend the distance between remote gain unit 1 and receiving end, simultaneously
The optical signal to noise ratio of Remote optical pumping amplifier can further be improved, to more effectively extend unrepeatered transmission distance.Further, since long-range
Gain unit 1 is made of Passive Optical Components and Er-doped fiber, and stability is preferable, and without power supply, there is no need to build relaying
It stands, later maintenance and monitoring, greatly reduces construction cost.
Based on any of the above-described embodiment, bypassing pump unit includes the first bypass pump unit, the second bypass pump unit
Pump unit is bypassed with third；First bypass pump unit is connect with the second transmission end, and the second bypass pump unit and second is instead
End connection is penetrated, third bypass pump unit is connect with the 4th transmission end.
Specifically, in bypass pump unit, the first bypass pump unit, the second bypass pump unit and third bypass pump
Pu unit is mutually independent three pumping sources.Wherein, the first bypass pump unit is connect by optical fiber with the second transmission end, is
Second transmission end provides bypass pump light.Second bypass pump unit is connect by optical fiber with the second reflection end, for the second reflection
End provides bypass pump light.Third bypass pump unit is connect by optical fiber with the 4th transmission end, provides side for the 4th transmission end
Road pump light.The pump light that first bypass pump unit, the second bypass pump unit and third bypass pump unit are sent can be with
It is the pump light of identical or different wavelength, the present invention is not especially limit this.
Based on any of the above-described embodiment, bypass pump unit and with road pump unit, connecing for signal light after amplification is set
Receiving end.
Herein, receiving end refers in optic path, the equipment for receiving service signal light.Signal light increases by long-range
After beneficial unit amplification, it is transmitted through the fiber to receiving end.It is arranged with road pump unit in receiving end, the road Bing Jiangsui pump light passes through
Above-mentioned optical fiber is transmitted to remote gain unit.That is, in the embodiment of the present invention, the 5th public termination of remote gain unit
Receive with road pump light, be to be issued from receiving end.
Based on any of the above-described embodiment, the length L of the optical cable between remote gain unit and receiving end is shown below:
In formula, PPUMPFor with the power of road pump light or bypass pump light, PPUMPUnit be mW；λ be with road pump light or
The wavelength of pump light is bypassed, the unit of λ is nm；α is loss factor of the optical cable at 1460nm wavelength, and the unit of α is dB/km.
When with road pump light power with bypass the power of pump light it is different, or with road pump light wavelength and bypass pumping
When the wavelength difference of light, above formula will be substituted into the power and wavelength of the power and wavelength of road pump light and bypass pump light respectively
In, obtain different cable length L, and therefrom choose the smallest cable length L as finally determining remote gain unit and
The distance between receiving end.
After determining the cable length between remote gain unit and receiving end, long-range increase can be determined according to cable length L
The installation site of beneficial unit.
Based on any of the above-described embodiment, the bypass pump light of the first bypass pump unit output and with the output of road pump unit
The wavelength with road pump light be 1460~1475nm, second bypass pump unit output bypass pump light and third bypass pump
The wavelength of the bypass pump light of Pu unit output is 1476~1490nm.
Based on any of the above-described embodiment, Fig. 3 be another embodiment of the present invention provides the structure of backward remote optical pumping amplifier show
It is intended to, as shown in figure 3, backward remote optical pumping amplifier includes remote gain unit 1, bypasses pump unit 2 and with road pump unit 3.
Wherein, bypass pump unit 2 includes that the first bypass pump unit 21, second bypasses pump unit 22 and third bypass
Pump unit 23.It is arranged with road pump unit 3 in receiving end.Remote gain unit 1 includes the first wavelength division multiplexer 11, the second wave
It division multiplexer 12, third wavelength division multiplexer 13, the 4th wavelength division multiplexer 14, the 5th wavelength division multiplexer 15, optoisolator 17 and mixes
Erbium optical fiber 16.
First transmission end 11a of the first wavelength division multiplexer 11 is for receiving signal light, the first reflection end 11b and the second wavelength-division
Second common end 12c connection of multiplexer 12, the first common end 11c are connect with one end of Er-doped fiber 16；Second wavelength-division multiplex
Second transmission end 12a of device 12 is connect with the first bypass pump unit 21, the bypass pump unit 22 of the second reflection end 12b and second
Connection；The third transmission end 13a of third wavelength division multiplexer 13 is the 5th saturating by optoisolator 17 and the 5th wavelength division multiplexer 15
End 15a connection is penetrated, third reflection end 13b is connect with the 4th common end 14c of the 4th wavelength division multiplexer 14, third common end 13c
It is connect with the other end of Er-doped fiber 16；The 4th transmission end 14a and third of 4th wavelength division multiplexer 14 bypass pump unit 23
Connection, the 4th reflection end 14b are connect with the 5th reflection end 15b of the 5th wavelength division multiplexer 15；The of 5th wavelength division multiplexer 15
Five common end 15c are connect with receiving end, are transmitted with what road pump unit 3 was sent with road pump light, and to receiving end for receiving
Amplified signal light.For the ease of distinguishing, the first bypass pump unit 21, second is hereafter bypassed into pump unit 22 and third
The pump light that bypass pump unit 23 issues is known as the first bypass pump light, the second bypass pump light and third bypass pump light.
In above-mentioned backward remote optical pumping amplifier, the flow direction of signal light is as follows: signal light passes through the first transmission end 11a entrance first
First wavelength division multiplexer 11 exports after 11 multiplex of the first wavelength division multiplexer from the first common end 11c.First common end 11c
It is connect with one end of Er-doped fiber 16, signal light after Er-doped fiber 16 and pump light collective effect by being amplified, and from er-doped
The other end of optical fiber 16 exports.The other end of Er-doped fiber 16 is connect with third common end 13c, and amplified signal light passes through the
Three common end 13c enter third wavelength division multiplexer 13, defeated from third transmission end 13a after 13 partial wave of third wavelength division multiplexer
Out.Third transmission end 13a is connect by optoisolator 17 with the 5th transmission end 15a, and amplified signal light passes through the 5th transmission
It holds 15a to enter the 5th wavelength division multiplexer 15, is exported after 15 multiplex of the 5th wavelength division multiplexer from the 5th common end 15c, transmission
To receiving end.
In above-mentioned backward remote optical pumping amplifier, the flow direction of pump light is as follows: the second transmission end 12a of the second wavelength division multiplexer 12
It is received by first that the first bypass pump unit 21 and the second bypass pump unit 22 are sent respectively with the second reflection end 12b
Road pump light and the second bypass pump light, the first bypass pump light and the second bypass pump light enter the second wavelength division multiplexer 12
Afterwards, it by 12 multiplex of the second wavelength division multiplexer, is exported from the second common end 12c.Second common end 12c and the first reflection end 11b
It connects, the first bypass pump light and the second bypass pump light after multiplex enter the first wavelength-division multiplex by the first reflection end 11b
Device 11 exports from the first common end 11c after 11 multiplex of the first wavelength division multiplexer, carries out positive pump into Er-doped fiber 16
Pu.The 5th common end 15c access of 5th wavelength division multiplexer 15 passes through the 5th common end 15c with road pump light with road pump light
Into after the 5th wavelength division multiplexer 15, exported after partial wave from the 5th reflection end 15b in the 5th wavelength division multiplexer 15.5th reflection
End 15b is connect with the 4th reflection end 14b, enters the 4th wavelength division multiplexer 14 by the 4th reflection end 14b with road pump light.This
Outside, the 4th transmission end 14a, which is received, bypasses pump light from the third that third bypass pump unit 23 is sent, and third bypasses pump light
Enter the 4th wavelength division multiplexer 14 by the 4th transmission end 14a.It is multiple in the 4th wavelength-division with road pump light and third bypass pump light
It is exported with multiplex in device 14, and by the 4th common end 14c.4th common end 14c is connect with third reflection end 13b, after multiplex
Third wavelength division multiplexer 13 entered by third reflection end 13b with road pump light and third bypass pump light, and in third wave
It is exported after multiplex from third common end 13c in division multiplexer 13, into Er-doped fiber 16, carries out backward pumping.Finally, positive pump
Pu and backward pumping collective effect realize the amplification to signal light in Er-doped fiber 16.
Backward remote optical pumping amplifier provided in an embodiment of the present invention, including remote gain unit 1, bypass pump unit 2 and with
Road pump unit 3 is not changing existing transmission device and fibre circuit, by increasing a remote gain list in actual track
It is long away from span without electronic relay light amplification that large capacity can be realized in member 1.In remote gain unit 1, pump light is bypassed based on two-way,
By the first wavelength division multiplexer 11 and the second wavelength division multiplexer 12 to 16 forward pumping of Er-doped fiber, based on bypassing pump light all the way
All the way with road pump light, by third wavelength division multiplexer 13, the 4th wavelength division multiplexer 14 and the 5th wavelength division multiplexer 15 to mixing
16 backward pumping of erbium optical fiber, realizes two directional pump, is able to extend the distance between remote gain unit 1 and receiving end, simultaneously
The optical signal to noise ratio of Remote optical pumping amplifier can further be improved, to more effectively extend unrepeatered transmission distance.Further, since long-range
Gain unit 1 is passive device, and stability is preferable, and without power supply, there is no need to build relay station, later maintenance and prison
Control, greatly reduces construction cost.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the embodiment of the present invention, rather than it is right
It is limited；Although the embodiment of the present invention is described in detail referring to foregoing embodiments, the ordinary skill of this field
Personnel are it is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, or to part
Or all technical features are equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution
The range of each embodiment technical solution of the embodiment of the present invention.
Claims (8)
1. a kind of backward remote gain unit, which is characterized in that including the first wavelength division multiplexer, the second wavelength division multiplexer, third
Wavelength division multiplexer, the 4th wavelength division multiplexer, the 5th wavelength division multiplexer and Er-doped fiber；
Wherein, the first transmission end of first wavelength division multiplexer is for receiving signal light, the first reflection end and second wave
Second common end of division multiplexer connects, and the first common end is connect with one end of the Er-doped fiber；
Second transmission end of second wavelength division multiplexer and the second reflection end are respectively used to receive bypass pump light；
The third transmission end of the third wavelength division multiplexer is connect with the 5th transmission end of the 5th wavelength division multiplexer, and third is anti-
It penetrates end to connect with the 4th common end of the 4th wavelength division multiplexer, the other end of third common end and the Er-doped fiber connects
It connects；
4th transmission end of the 4th wavelength division multiplexer is for receiving the bypass pump light, the 4th reflection end and the described 5th
5th reflection end of wavelength division multiplexer connects；
5th common end of the 5th wavelength division multiplexer is for receiving with road pump light and exporting the amplified signal light.
2. remote gain unit according to claim 1, which is characterized in that it further include optoisolator, the optoisolator
It is arranged between the third transmission end and the 5th transmission end, the input terminal of the optoisolator and the third transmission end
Connection, the output end of the optoisolator are connect with the 5th transmission end.
3. remote gain unit according to claim 1, which is characterized in that the erbium ion concentration of the Er-doped fiber exists
It is 2.5~3.0dB/m at 1530nm wavelength, the numerical aperture of the Er-doped fiber is 0.28~0.3, the mould of the Er-doped fiber
Field diameter is 4.2~4.6 μm at 1550nm wavelength, and the length of the Er-doped fiber is 25~35m.
4. a kind of backward remote optical pumping amplifier, which is characterized in that including remote gain as claimed any one in claims 1 to 3
Unit, and bypass pump unit and with road pump unit；The bypass pump unit is used to mention for the remote gain unit
It is described to be used to provide for the remote gain unit with road pump light with road pump unit for bypassing pump light.
5. remote optical pumping amplifier according to claim 4, which is characterized in that the bypass pump unit includes the first bypass pump
Pu unit, the second bypass pump unit and third bypass pump unit；
The first bypass pump unit is connect with the second transmission end, and the second bypass pump unit and the second reflection end connect
It connects, the third bypass pump unit is connect with the 4th transmission end.
6. remote optical pumping amplifier according to claim 4, which is characterized in that the bypass pump unit and described pumped with road
Unit is arranged in receiving end.
7. remote optical pumping amplifier according to claim 6, which is characterized in that the remote gain unit and the receiving end it
Between the length L of optical cable be shown below:
In formula, PPUMPFor it is described with road pump light or it is described bypass pump light power, PPUMPUnit be mW；λ is described with road
The wavelength of pump light or the bypass pump light, the unit of λ is nm；α is loss factor of the optical cable at 1460nm wavelength,
The unit of α is dB/km.
8. remote optical pumping amplifier according to claim 5, which is characterized in that the bypass of the first bypass pump unit output
Pump light and the wavelength with road pump light with the output of road pump unit are 1460~1475nm, the second bypass pumping
Unit output bypass pump light and the third bypass pump unit output bypass pump light wavelength be 1476~
1490nm。
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| CN201811385488.9A CN109451376B (en) | 2018-11-20 | 2018-11-20 | Backward remote gain unit and remote pump amplifier |
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| CN109451376B CN109451376B (en) | 2021-12-28 |
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Cited By (1)
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| CN112217562A (en) * | 2020-09-10 | 2021-01-12 | 武汉光迅科技股份有限公司 | Underwater monitoring optical transmission system |
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| CN109451376B (en) | 2021-12-28 |
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