CN109728854A - To remote gain unit and remote optical pumping amplifier before a kind of - Google Patents
To remote gain unit and remote optical pumping amplifier before a kind of Download PDFInfo
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- CN109728854A CN109728854A CN201811385456.9A CN201811385456A CN109728854A CN 109728854 A CN109728854 A CN 109728854A CN 201811385456 A CN201811385456 A CN 201811385456A CN 109728854 A CN109728854 A CN 109728854A
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Abstract
The embodiment of the present invention is provided to remote gain unit and remote optical pumping amplifier before one kind, and wherein forward direction remote gain unit includes the first wavelength division multiplexer, the second wavelength division multiplexer, third wavelength division multiplexer and Er-doped fiber；The common end of first wavelength division multiplexer and the second wavelength division multiplexer is connect with the both ends of Er-doped fiber respectively, and the reflection end of the second wavelength division multiplexer is connect with the common end of third wavelength division multiplexer；The transmission end of first wavelength division multiplexer is for receiving signal light and with road pump light, and the reflection end of the first wavelength division multiplexer is for receiving bypass pump light；The transmission end of second wavelength division multiplexer is for exporting amplified signal light；The transmission end and reflection end of third wavelength division multiplexer are respectively used to receive bypass pump light.Forward direction remote gain unit and remote optical pumping amplifier provided in an embodiment of the present invention, realize two directional pump, can effectively extend the transmission range of overlength span optical fiber telecommunications system, reduce track laying cost, stability is good, and the service life is long.
Description
Technical field
The present embodiments relate to amplify before technical field of photo communication, more particularly to one kind to remote gain unit and distant pump
Device.
Background technique
With the development of Fibre Optical Communication Technology, the distance that ultra-long span light transmission system needs to transmit is increasingly longer, easily
Several hundred kilometers.In such a case, it is possible to carry out extended fiber transmission span by using remote optical pumping amplifier, it is pre- to improve system power
It calculates.
Forward direction remote optical pumping amplifier refers to introduces one by gain media Er-doped fiber (Erbium in system transmission link
Doped Fiber, EDF) and relevant passive device composition remote gain unit (Remote Gain Unit, RGU), by RGU
It is placed on inside connector box, it will thus provide the pumping source for pumping amplification is placed on the transmitting terminal of Transmission system.Signal light is in er-doped light
Fine inside is amplified, to significantly improve the Output optical power of transmission fiber.And since RGU is inactive component, in the point
It is not required to power supply facilities and personnel's maintenance, suitable for passing through the maintenance such as desert, plateau, lake, straits and the inconvenient area of power supply,
Reduce regular maintenance cost.
Remote optical pumping amplifier includes pumping and bypassing two kinds of pumping configurations of pumping with road, is signal light and pumping with road pumping configuration
Light is transmitted in same root fibre core；Bypass pumping configuration is that signal light and pump light are transmitted in two fibre cores.With road pumping configuration
In, Transmission system has certain limitation to pumping light intensity, and excessively high pump light can generate excited Brillouin and stimulated Raman scattering
Etc. nonlinear effects, and after long distance transmission, with the function of road pump light or bypass pump light to remote gain unit
Rate has been difficult to meet the requirement of pump power.Therefore the extensible transmission range of remote gain unit is very limited.
Summary of the invention
The embodiment of the present invention is provided before one kind to 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 is provided before one kind to remote gain unit, including the first wavelength division multiplexer, second
Wavelength division multiplexer, third wavelength division multiplexer and Er-doped fiber；
Wherein, the common end of first wavelength division multiplexer and second wavelength division multiplexer respectively with the Er-doped fiber
Both ends connection, the reflection end of second wavelength division multiplexer connect with the common end of the third wavelength division multiplexer；
The transmission end of first wavelength division multiplexer is for receiving signal light and with road pump light, first wavelength-division multiplex
The reflection end of device is for receiving bypass pump light；The transmission end of second wavelength division multiplexer is for exporting the amplified letter
Number light；The transmission end and reflection end of the third wavelength division multiplexer are respectively used to receive the bypass pump light.
Second aspect, the embodiment of the present invention are provided before one kind to remote optical pumping amplifier, including long-range increasing described in first aspect
Beneficial unit and remotely pumping unit；The remotely pumping unit is connect by optical cable with the remote gain unit, described remote
Journey pump unit is used to provide bypass pump light for the remote gain unit and with road pump light.
It is provided in an embodiment of the present invention a kind of preceding to remote gain unit and remote optical pumping amplifier, it is multiple by three wavelength-divisions of setting
Pump light is bypassed based on two-way based on pump light is bypassed with road pump light and all the way to Er-doped fiber forward pumping all the way with device
To Er-doped fiber backward pumping, realize two directional pump, can not change transmission coding mode, transmission link enters fine light function
Under conditions of rate etc. influences system parameter, effectively extend the transmission range of overlength span optical fiber telecommunications system, so that long logical away from light
Letter optical cable laying does not need to be laid with cable, reduces track laying cost, and remote gain unit is passive device, performance is stablized
Property is good, and the service life is long, the maintenance without the later period.
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 forward direction remote gain unit provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of forward direction remote optical pumping amplifier provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of remotely pumping unit provided in an embodiment of the present invention；
Fig. 4 be another embodiment of the present invention provides forward direction remote optical pumping amplifier structural schematic diagram；
Fig. 5 is for signal light provided in an embodiment of the present invention and with road pump light bent with the optical power change in the fibre core of road
Line；
Description of symbols:
The first wavelength division multiplexer of 11-；The transmission end of the first wavelength division multiplexer of 11a-；
The reflection end of the first wavelength division multiplexer of 11b-；The common end of the first wavelength division multiplexer of 11c-；
The second wavelength division multiplexer of 12-；The transmission end of the second wavelength division multiplexer of 12a-；
The reflection end of the second wavelength division multiplexer of 12b-；The common end of the second wavelength division multiplexer of 12c-；
13- third wavelength division multiplexer；The transmission end of 13a- third wavelength division multiplexer；
The reflection end of 13b- third wavelength division multiplexer；The common end of 13c- third wavelength division multiplexer；
14- Er-doped fiber；1- remote gain unit；
2- remotely pumping unit；3- optical cable；
21- first bypasses pump unit；22- second bypasses pump unit；
23- third bypasses pump unit；24- is with road pump unit；
31- first bypasses fibre core；32- second bypasses fibre core；
33- third bypasses fibre core；34- is with road fibre core.
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 very limited situation of extended transmission range, the embodiment of the invention provides before one kind to remote gain unit.Fig. 1 is this
The structural schematic diagram for the forward direction remote gain unit that inventive embodiments provide, as shown in Figure 1, forward direction remote gain unit includes the
One wavelength division multiplexer 11, the second wavelength division multiplexer 12, third wavelength division multiplexer 13 and Er-doped fiber 14.Wherein, the first wavelength-division is multiple
It is connect respectively with the both ends of Er-doped fiber 14 with common end 11c, 12c of device and the second wavelength division multiplexer, the second wavelength division multiplexer
Reflection end 12b connect with the common end 13c of third wavelength division multiplexer；The transmission end 11a of first wavelength division multiplexer is for receiving
Signal light and with road pump light, the reflection end 11b of the first wavelength division multiplexer is for receiving bypass pump light；Second wavelength division multiplexer
Transmission end 12a for exporting amplified signal light；The transmission end 13a and reflection end 13b of third wavelength division multiplexer are used respectively
Pump light is bypassed in receiving.
Specifically, forward direction remote gain unit includes three wavelength division multiplexers, for ease of description, above three wavelength-division is answered
The first wavelength division multiplexer 11, the second wavelength division multiplexer 12, third wavelength division multiplexer 13 is used to indicate respectively with device.It needs to illustrate
It is 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 respectively
The common end and.
For the first wavelength division multiplexer 11, the transmission end 11a of the first wavelength division multiplexer is for receiving signal light and pumping with road
Pu light, signal light refers to the service signal light of transmitting terminal transmission herein, refers to road pump light and signal light is on same fibre core
The pump light of transmission.The reflection end 11b of first wavelength division multiplexer will pass through for receiving bypass pump light, the first wavelength division multiplexer
Transmission end 11a input carries out multiplex with the bypass pump light inputted by reflection end 11b with road pump light, and passes through common end
11c output.In addition, the common end 11c output for passing through the first wavelength division multiplexer further includes signal light.First wavelength division multiplexer
Common end 11c is connect with the input terminal of Er-doped fiber 14, defeated with common end 11c is passed through after road pump light and the photosynthetic wave of bypass pumping
Out, forward pumping is carried out to Er-doped fiber 14.
For third wavelength division multiplexer 13, the transmission end 13a and reflection end 13b of third wavelength division multiplexer are used to receive other
Road pump light, the bypass pump light for injecting third wavelength division multiplexer 13 herein and the bypass for injecting the first wavelength division multiplexer 11 pump
Light, which can be, to be also possible to inject third wavelength-division multiplex from different bypass pump units from same bypass pump unit
The bypass pump light of the transmission end 13a of device and the bypass pump light for the reflection end 13b for injecting third wavelength division multiplexer can come from
Same bypass pump unit is also possible to from different bypass pump units, and the present invention is not especially limit this.
After two-way bypass pump light injects the transmission end 13a and reflection end 13b of third wavelength division multiplexer respectively, in third wavelength division multiplexer
Multiplex in 13, and exported by the common end 13c of third wavelength division multiplexer.The common end 13c of third wavelength division multiplexer and second
The reflection of the second wavelength division multiplexer is transmitted to after the photosynthetic wave of the reflection end 12b connection of wavelength division multiplexer 12, i.e. two-way bypass pumping
Hold 12b.
For the second wavelength division multiplexer 12, the reflection end 12b of the second wavelength division multiplexer is for receiving two roadsides after multiplex
The common end 12c of road pump light, the second wavelength division multiplexer is connect with the output end of Er-doped fiber 14, the two-way bypass pump after multiplex
Pu light enters Er-doped fiber 14 from the common end 12c of the second wavelength division multiplexer, carries out backward pumping to Er-doped fiber 14.Second wave
The amplified signal light of two directional pump is passed through in the transmission end 12a output of division multiplexer.
Remote gain unit provided in an embodiment of the present invention, by the way that three wavelength division multiplexers are arranged, based on being pumped all the way with road
Pu light and all the way bypass pump light are to Er-doped fiber forward pumping, based on two-way bypass pump light to Er-doped fiber backward pumping,
Two directional pump is realized, system parameter can be influenced in the incident optical power etc. for not changing transmission coding mode, transmission link
Under the conditions of, effectively extend the transmission range of overlength span optical fiber telecommunications system, so that length does not need to spread away from optic communication optical cable laying
If cable, track laying cost is reduced, and remote gain unit is passive device, stability is good, and the service life is long, after being not necessarily to
The maintenance of phase.
It based on the above embodiment, further include optoisolator, the transmission of the output end of optoisolator and the first wavelength division multiplexer
End connection, the input terminal of optoisolator is for receiving signal light and with road pump light.
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 transmission of the first wavelength division multiplexer
Optoisolator is added before end, can guarantee to cause to decay not to signal light and with road pump light, so that the first wavelength division multiplexer
Transmission end can receive signal light and with road pump light under the premise of, reduce system because of noise caused by reflected light.
Based on any of the above-described embodiment, the insertion loss range between the transmission end and common end of the first wavelength division multiplexer is
0.1~0.5dB；Insertion loss range between the common end and transmission end of second wavelength division multiplexer is 0.1~0.5dB.
Based on any of the above-described embodiment, the isolation range between the transmission end and reflection end of the first wavelength division multiplexer is 30
~50dB；Isolation range between the reflection end and transmission end of third wavelength division multiplexer is 30~50dB.
Based on any of the above-described embodiment, Fig. 2 is the structural schematic diagram of forward direction remote optical pumping amplifier provided in an embodiment of the present invention,
As shown in Fig. 2, forward direction remote optical pumping amplifier, including remote gain unit 1 and remotely pumping unit 2；Remotely pumping unit 2 passes through
Optical cable 3 is connect with remote gain unit 1, and remotely pumping unit 2 is used to provide bypass pump light and Sui Lu for remote gain unit 1
Pump light.
Specifically, remote gain unit 1 is the forward direction remote gain unit in any of the above-described embodiment, remotely pumping unit
2 are connect by optical cable 3 with remote gain unit 1, provide pump light for remote gain unit 1.Further, with reference to Fig. 1, remotely
The transmission end 11a of first wavelength division multiplexer is for receiving with road pump light, the reflection end of the first wavelength division multiplexer in gain unit 1
11b is respectively used to receive bypass pump for receiving bypass pump light, the transmission end 13a and reflection end 13b of third wavelength division multiplexer
Pu light.Therefore, accordingly, remotely pumping unit 2 need by optical cable 3 for the transmission end 11a of the first wavelength division multiplexer provide with
Road pump light provides bypass pump light for the reflection end 11b of the first wavelength division multiplexer, and respectively third wavelength division multiplexer is saturating
It penetrates end 13a and reflection end 13b and bypass pump light is provided.Herein, what remotely pumping unit 2 provided pumps with road pump light and bypass
Light can come from same pumping source, can be from different pumping sources, such as remotely pumping unit 2 comprising two pumpings
Source, for providing with road pump light, another pumping source can also include one of pumping source for providing bypass pump light
Four pumping sources, for one of pumping source for providing with road pump light, excess-three pumping source is respectively wavelength division multiplexer
A port is for providing bypass pump light, and the present invention is not especially limit this.
Forward direction remote optical pumping amplifier provided in an embodiment of the present invention, including remote gain unit 1 and remotely pumping unit 2, far
Journey gain unit 1 is based on bypassing pump light to er-doped light with road pump light and all the way all the way by three wavelength division multiplexers of setting
Fine 14 forward pumpings realize two directional pump, can not change based on two-way bypass pump light to 14 backward pumping of Er-doped fiber
Under conditions of change transmission coding mode, incident optical power of transmission link etc. influence system parameter, effectively extend overlength span light
The transmission range of fiber communication system reduces track laying cost so that long do not need to be laid with cable away from optic communication optical cable laying, and
And remote gain unit 1 is passive device, stability is good, and the service life is long, the maintenance without the later period.
Based on any of the above-described embodiment, Fig. 3 is the structural schematic diagram of remotely pumping unit provided in an embodiment of the present invention, such as
Shown in Fig. 3, remotely pumping unit 2 includes bypassing pump unit 21, second with road pump unit 24, first to bypass pump unit 22
Pump unit 23 is bypassed with third；It include to bypass fibre core 31, second with road fibre core 34, first to bypass 32 and of fibre core in optical cable 3
Third bypasses fibre core 33.With road pump unit 24 by being connect with road fibre core 34 with the transmission end of the first wavelength division multiplexer, first
Bypass pump unit 21 is connect by the first bypass fibre core 31 with the reflection end of the first wavelength division multiplexer, the second bypass pump unit
22 are connect by the second bypass fibre core 32 with the transmission end of third wavelength division multiplexer, and third bypasses pump unit 23 and passes through by third
Road fibre core 33 is connect with the reflection end of third wavelength division multiplexer.
Specifically, in remotely pumping unit 2, the bypass pumping of pump unit 21, second is bypassed with road pump unit 24, first
Unit 22 and third bypass pump unit 23 are mutually independent four pumping sources, wherein with road pump unit 24 by with road
Fibre core 34 is connect with the transmission end of the first wavelength division multiplexer, is provided for the transmission end of the first wavelength division multiplexer with road pump light.The
One bypass pump unit 21 is connect by the first bypass fibre core 31 with the reflection end of the first wavelength division multiplexer, is the first wavelength-division multiplex
The reflection end of device provides bypass pump light.Second bypass pump unit 22 passes through the second bypass fibre core 32 and third wavelength division multiplexer
Transmission end connection, provide bypass pump light for the transmission end of third wavelength division multiplexer.Third bypasses pump unit 23 by the
Three bypass fibre cores 33 are connect with the reflection end of third wavelength division multiplexer, provide bypass pumping for the reflection end of third wavelength division multiplexer
Light.
Based on any of the above-described embodiment, if the single channel rate of signal light is 2.5Gb/s, 10Gb/s or 100Gb/s, light
Cable length L is shown below:
If the single channel rate of signal light is 200Gb/s, cable length L is shown below:
If the single channel rate of signal light is 400Gb/s, cable length L is shown below:
In formula, α is the loss factor of the signal light, and the unit of α is dB/km.The road cable length L Ji Sui fibre core, first
The length of fibre core, the second bypass fibre core and third bypass fibre core is bypassed, the unit of cable length L is km.
Remote optical pumping amplifier provided in an embodiment of the present invention, be suitable for 2.5Gb/s, 10Gb/s, 100Gb/s, 200Gb/s and
The SDH (Synchronous Digital Hierarchy, synchronous digital system) and WDM of any single channel rate in 400Gb/s
(Wavelength Division Multiplexing, wavelength-division multiplex) optical transmission system is suitable for intensity modulated, amplitude is modulated
Etc. coding modes, be conducive to the smooth upgrade of system.
Based on any of the above-described embodiment, pass through with road pump unit with road fibre core and optoisolator and the first wavelength division multiplexer
Transmission end connection, with road pump unit be used for signal light carry out Raman amplifiction, and be the first wavelength division multiplexer transmission end
It provides with road pump light.
It specifically, include optoisolator in remote gain unit, and the output end of optoisolator and the first wavelength division multiplexer
Transmission end connection in the case where, with road pump unit need by with road fibre core and optoisolator input terminal connection, thus
Realize the connection with optical path between road pump unit and the transmission end of the first wavelength division multiplexer.Herein, not only with road pump unit
Have the effect of Raman-amplifying signal light, be also equipped with the signal light after Raman amplifiction and be transmitted to the first wavelength-division with road pump light
The effect of the transmission end of multiplexer.It should be noted that in the case where not including optoisolator in remote gain unit, with road
Pump unit is likewise supplied with the effect of Raman-amplifying signal light.
Based on any of the above-described embodiment, the wave-length coverage with road pump unit is 1465~1480nm, the first bypass pumping
The wave-length coverage of unit is 1480~1500nm, and second bypasses the wave-length coverage of pump unit for 1480~1500nm, by third
The wave-length coverage of road pump unit is 1465~1480nm.
Based on any of the above-described embodiment, with road pump unit, the first bypass pump unit, the second bypass pump unit and the
The pumping light power range of three bypass pump units is 30~37dBm.
Based on any of the above-described embodiment, Fig. 4 be another embodiment of the present invention provides the structure of forward direction remote optical pumping amplifier show
It is intended to, as shown in figure 4, forward direction remote optical pumping amplifier includes remote gain unit 1 and remotely pumping unit 2, the two is connected by optical cable 3
It connects.
Remotely pumping unit 2 includes bypassing pump unit 21, second with road pump unit 24, first to bypass pump unit 22
Pump unit 23 is bypassed with third.It include to bypass fibre core 31, second with road fibre core 34, first to bypass fibre core 32 and the in optical cable
Three bypass fibre cores 33.Remote gain unit 1 includes the first wavelength division multiplexer 11, the second wavelength division multiplexer 12, third wavelength-division multiplex
Device 13 and Er-doped fiber 14, wherein common end 11c, 12c of the first wavelength division multiplexer and the second wavelength division multiplexer respectively with er-doped
The both ends of optical fiber 14 connect, and the reflection end 12b of the second wavelength division multiplexer is connect with the common end 13c of third wavelength division multiplexer.
It is first wave with road pump unit 24 by being connect with road fibre core 34 with the transmission end 11a of the first wavelength division multiplexer
The transmission end 11a of division multiplexer is provided with road pump light.First bypass pump unit 21 passes through the first bypass fibre core 31 and first
The reflection end 11b connection of wavelength division multiplexer, provides bypass pump light for the reflection end 11b of the first wavelength division multiplexer.Second bypass
Pump unit 22 is connect by the second bypass fibre core 32 with the transmission end 13a of third wavelength division multiplexer, is third wavelength division multiplexer
Transmission end 13a provide bypass pump light.Third bypasses pump unit 23 and bypasses fibre core 33 and third wavelength-division multiplex by third
The reflection end 13b connection of device, provides bypass pump light for the reflection end 13b of third wavelength division multiplexer.Hereafter to divide convenient for distinguishing
The first bypass pump unit 21, second is not bypassed the pump light that pump unit 22 and third bypass pump unit 23 issue to be known as
First bypass pump light, the second bypass pump light and third bypass pump light.
The transmission end 11a of first wavelength division multiplexer for receiving signal light and with road pump light, the first wavelength division multiplexer
Reflection end 11b will be with road pump light and the first bypass pump light for receiving the first bypass pump light, the first wavelength division multiplexer 11
Multiplex is carried out, and is exported by common end 11c, forward pumping is carried out to Er-doped fiber 14.
The transmission end 13a of third wavelength division multiplexer is for receiving the second bypass pump light, the reflection of third wavelength division multiplexer
For end 13b for receiving third bypass pump light, it is multiple that the first bypass pump light and the second bypass pump light inject third wavelength-division respectively
After the transmission end 13a and reflection end 13b of device, the multiplex in third wavelength division multiplexer 13, and pass through third wavelength division multiplexer
Common end 13c output, is transmitted to the reflection end 12b of the second wavelength division multiplexer.By the second bypass pump light and third after multiplex
Road pump light is inputted from the reflection end 12b of the second wavelength division multiplexer, enters er-doped light from the common end 12c of the second wavelength division multiplexer
Fibre 14 carries out backward pumping to Er-doped fiber 14.
To sum up, with road pump light and the first bypass pump light by after 11 multiplex of the first wavelength division multiplexer to Er-doped fiber 14
Carry out forward pumping, the second bypass pump light and third bypass pump light by after 13 multiplex of third wavelength division multiplexer by second
Wavelength division multiplexer 12 carries out backward pumping to Er-doped fiber 14, constitutes bidirectional pumping structure, realizes the amplification of signal light.
Based on any of the above-described embodiment, with reference to the forward direction remote optical pumping amplifier that Fig. 4 is provided, wherein carrying out the signal of business transmission
The a length of 1550nm of light wave, nominal loss is generally 0.2dB/km in single mode optical fiber, if with the output of road pump unit
It is 1480nm with road pump wavelength, is generally 0.223dB/km with the loss nominal in single mode optical fiber of road pump light.With road
In pump unit Xiang Suilu fibre core inject 0dBm (1mW) signal light, and be pumped into 31dBm (1260mW) with road pump light.Letter
The transmission equation of number road Guang Hesui pump light is as follows:
In formula, PsAnd PpRespectively signal light and the power with road pump light, γsAnd γpRespectively signal light and pumped with road
The frequency of Pu light, AeffFor with the cross-sectional area of road fibre core, αsAnd αpRespectively signal light and with road pump light in road fibre core
Optical fiber loss factor, gRFor Raman gain coefficienct, z is transmission range.According to the available signal light of above-mentioned formula and Sui Lu
Pump light is with the optical power change curve in the fibre core of road, and Fig. 5 is for signal light provided in an embodiment of the present invention and with road pump light
With the optical power change curve in the fibre core of road.The optical power change of signal light when as shown in Figure 5, compared to without with road pump light
The optical power loss of curve, the signal light when pump light of the road You Sui is smaller.
For only including the remote optical pumping amplifier with road pump unit, not comprising bypass pump unit, sent in transmitting terminal single
The signal light of wave 10G, by entering transmission fiber transmission with road pump unit, remote gain unit is located at distance and pumps list with road
At first 91km, signal light is amplified into the transmission fiber that length is 100km by remote gain unit and is transmitted, and is finally entered
Receiving end.Making into remote gain unit with road pumping light power 10dBm, the noise figure of remote gain unit is 6dB,
The gain of remote gain unit is 8dB, and the turn off gain with road pump unit is 21.6dB, obtains output optical signal to noise ratio and is
48dB。
For only including sending unicast in transmitting terminal with the remote optical pumping amplifier of road pump unit and a bypass pump unit
The signal light of 10G, by entering transmission fiber transmission with road pump unit, remote gain unit is located at apart from remotely pumping unit
At (including with road pump unit and a bypass pump unit) 104km, signal light is amplified by remote gain unit
It is transmitted in the transmission fiber that length is 100km, finally enters receiving end.Make the pumping light power into remote gain unit
7dBm, the noise figure of remote gain unit are 6dB, and the gain of remote gain unit is 8dB, are increased with the switch of road pump unit
Benefit is 21.6dB, turn off gain 21.74dB, and obtaining output optical signal to noise ratio is 45.7dB.
For including sending unicast in transmitting terminal with the remote optical pumping amplifier of road pump unit and two bypass pump units
The signal light of 10G, by entering transmission fiber transmission with road pump unit, remote gain unit is located at apart from remotely pumping unit
At (including with road pump unit and two bypass pump units) 112km, signal light is amplified by remote gain unit
The transmission fiber crossing that length is 100km is transmitted, and receiving end is finally entered.Make the pumping light power into remote gain unit
5.3dBm, the noise figure of remote gain unit are 6dB, and the gain of remote gain unit is 8dB, turn off gain 21.77dB,
Obtaining output optical signal to noise ratio is 44.25dB.
For including sending unicast in transmitting terminal with the remote optical pumping amplifier of road pump unit and three bypass pump units
The signal light of 10G, by entering transmission fiber transmission with road pump unit, remote gain unit is located at apart from remotely pumping unit
At (including with road pump unit and three bypass pump units) 117.2km, signal light is amplified laggard by remote gain unit
Enter the transmission fiber that length is 100km to transmit, finally enters receiving end.Make the pumping light power into remote gain unit
4dBm, the noise figure of remote gain unit are 6dB, and the gain of remote gain unit is 8dB, and turn off gain 21.79dB is obtained
It is 43.26dB to output optical signal to noise ratio.
It is found that the remote optical pumping amplifier of the bypass pumping of Sui Lu and three is relative to the remote optical pumping amplifier pumped with road, the light of system
4.74dB can be improved in signal-to-noise ratio；The remote optical pumping amplifier of the bypass pumping of Sui Lu and three is put relative to the distant pump of Sui Lu and single bypass pumping
2.44dB can be improved in the optical signal to noise ratio of big device, system；The remote optical pumping amplifier of the bypass pumping of Sui Lu and three is relative to Sui Lu and double sides
1dB can be improved in the remote optical pumping amplifier of road pumping, the optical signal to noise ratio of system.
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 (10)
1. to remote gain unit before a kind of, which is characterized in that including the first wavelength division multiplexer, the second wavelength division multiplexer, third
Wavelength division multiplexer and Er-doped fiber；
Wherein, the common end of first wavelength division multiplexer and second wavelength division multiplexer respectively with the Er-doped fiber two
End connection, the reflection end of second wavelength division multiplexer are connect with the common end of the third wavelength division multiplexer；
The transmission end of first wavelength division multiplexer for receiving signal light and with road pump light, first wavelength division multiplexer
Reflection end is for receiving bypass pump light；The transmission end of second wavelength division multiplexer is for exporting the amplified signal
Light；The transmission end and reflection end of the third wavelength division multiplexer are respectively used to receive the bypass pump light.
2. remote gain unit according to claim 1, which is characterized in that it further include optoisolator, the optoisolator
Output end connect with the transmission end of first wavelength division multiplexer, the input terminal of the optoisolator is for receiving the signal
Light and described with road pump light.
3. remote gain unit according to claim 1, which is characterized in that the transmission end of first wavelength division multiplexer with
Insertion loss range between common end is 0.1~0.5dB；Between the common end and transmission end of second wavelength division multiplexer
Insertion loss range is 0.1~0.5dB.
4. remote gain unit according to claim 1, which is characterized in that the transmission end of first wavelength division multiplexer with
Isolation range between reflection end is 30~50dB；Being isolated between the reflection end and transmission end of the third wavelength division multiplexer
Degree range is 30~50dB.
5. to remote optical pumping amplifier before a kind of, which is characterized in that including remote gain according to any one of claims 1 to 4
Unit and remotely pumping unit；The remotely pumping unit is connect by optical cable with the remote gain unit, described long-range
Pump unit is used to provide bypass pump light for the remote gain unit and with road pump light.
6. remote optical pumping amplifier according to claim 5, which is characterized in that the remotely pumping unit includes pumping list with road
Member, the first bypass pump unit, the second bypass pump unit and third bypass pump unit；
It include with road fibre core, the first bypass fibre core, the second bypass fibre core and third bypass fibre core in the optical cable；
It is described to be connect with road fibre core with the transmission end of first wavelength division multiplexer with road pump unit by described, described first
Bypass pump unit is connect by the first bypass fibre core with the reflection end of first wavelength division multiplexer, second bypass
Pump unit is connect by the second bypass fibre core with the transmission end of the third wavelength division multiplexer, the third bypass pumping
Unit bypasses fibre core by the third and connect with the reflection end of the third wavelength division multiplexer.
7. remote optical pumping amplifier according to claim 5, which is characterized in that if the single channel rate of the signal light is
2.5Gb/s, 10Gb/s or 100Gb/s, then the length L of the optical cable is shown below:
If the single channel rate of the signal light is 200Gb/s, the length L of the optical cable is shown below:
If the single channel rate of the signal light is 400Gb/s, the length L of the optical cable is shown below:
In formula, α is the loss factor of signal light.
8. remote optical pumping amplifier according to claim 6, which is characterized in that described fine with road described in road pump unit
Core and optoisolator are connect with the transmission end of first wavelength division multiplexer, described to be used to carry out signal light with road pump unit
Raman amplifiction, and provide for the transmission end of first wavelength division multiplexer described with road pump light.
9. remote optical pumping amplifier according to claim 6, which is characterized in that the wave-length coverage with road pump unit is
The wave-length coverage of 1465~1480nm, the first bypass pump unit are 1480~1500nm, and the second bypass pumping is single
The wave-length coverage of member is 1480~1500nm, and the wave-length coverage of the third bypass pump unit is 1465~1480nm.
10. remote optical pumping amplifier according to claim 6, which is characterized in that it is described with road pump unit, it is described first bypass
Pump unit, it is described second bypass pump unit and the third bypass pump unit pumping light power range be 30~
37dBm。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113824500A (en) * | 2021-10-25 | 2021-12-21 | 国家电网有限公司信息通信分公司 | Passive optical amplification unit and multiband ultra-long span transmission system |
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| CN1556438A (en) * | 2003-12-30 | 2004-12-22 | 武汉光迅科技有限责任公司 | Gain dsplacement type thulium aduterated optical fiber amplifier using spontaneous radiation light source as auxiliary pumping |
| US20080247034A1 (en) * | 2005-02-24 | 2008-10-09 | At&T Corp. | Fast Dynamic Gain Control in a Bidirectionally-Pumped Raman Fiber Amplifier |
| CN108599851A (en) * | 2018-05-22 | 2018-09-28 | 武汉光迅科技股份有限公司 | A kind of single spanning distance optical transmission system and method |
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| EP1045535A2 (en) * | 1999-04-16 | 2000-10-18 | Nec Corporation | Optical amplifier equipment for WDM optical communication |
| CN1556438A (en) * | 2003-12-30 | 2004-12-22 | 武汉光迅科技有限责任公司 | Gain dsplacement type thulium aduterated optical fiber amplifier using spontaneous radiation light source as auxiliary pumping |
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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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| CN113824500A (en) * | 2021-10-25 | 2021-12-21 | 国家电网有限公司信息通信分公司 | Passive optical amplification unit and multiband ultra-long span transmission system |
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| CN109728854B (en) | 2020-06-02 |
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