CN107154575B - Fiber amplifier - Google Patents
Fiber amplifier Download PDFInfo
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- CN107154575B CN107154575B CN201710504886.7A CN201710504886A CN107154575B CN 107154575 B CN107154575 B CN 107154575B CN 201710504886 A CN201710504886 A CN 201710504886A CN 107154575 B CN107154575 B CN 107154575B
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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
-
- 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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0064—Anti-reflection devices, e.g. optical isolaters
-
- 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
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- 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
Abstract
A kind of fiber amplifier, including pumping source, signal source and the wavelength division multiplexer, Er-doped fiber and the Wave decomposing multiplexer that constitute optics main road, in which: pumping source, for providing pump light；Signal source, for providing signal light；Wavelength division multiplexer obtains complex light for coupling pumping light and signal light；Er-doped fiber, for absorbing the pump light in complex light to carry out gain amplification to the signal light in complex light；Wave decomposing multiplexer, for the amplified complex light of gain to be decomposed into remnant pump light and output signal light.The signal light and pump light of the disclosure, couple to form complex light by wavelength division multiplexer, so that signal light and pump light inject in Er-doped fiber from same direction, to reduce the noise coefficient of fiber amplifier；And the fiber amplifier of the disclosure can significantly increase gain factor, realize the high-gain of fiber amplifier.
Description
Technical field
The disclosure belongs to fiber optic communication field, relates more specifically to a kind of fiber amplifier.
Background technique
Fiber optic communication is one of field with fastest developing speed in the world today, in traditional optical fiber telecommunications system, in order to gram
The influence that signal is transmitted in fibre loss is taken, needs to carry out regenerative repeating to the optical signal decayed every a certain distance.And
When traditional repeater amplifies optical signal, need to carry out photoelectric conversion, electrically amplified, timing, shaping pulse and electro-optic conversion again,
Although this process is very applicable for the Single wavelength of moderate rate, high speed multi-wavelength system is then not suitable for, there is transmission
Bottleneck, so the research of various Optical Amplification Technologies has very important significance for the development tool of optical fiber telecommunications system.
As one kind of image intensifer, erbium-doped fiber amplifier (EDFA) is widely used in fiber optic communication systems,
For example as in long haul communications systems relay amplifier, as the power ascension of optical transmitter rear class in optical fiber telecommunications system
Amplifier and the preamplifier of photoreceiver prime, the broadband amplification as high-speed high capacity multi-channel optical fiber communication system
Device, and as orphan's energy compensating amplifier in high speed Long Distance Optical Soliton Communication System.
In certain fiber amplifier communication links for needing high-gain, the cascade scheme of multiple EDFA is often used, but
While improving gain, chain noise factor and length can all increase, and link performance is caused to decline.
Disclosure
Based on the above technical problem, the main purpose of the disclosure is to propose a kind of fiber amplifier, more than solving
At least one of technical problem.
To achieve the goals above, the present disclosure proposes a kind of fiber amplifiers, including pumping source, signal source and composition
Wavelength division multiplexer, Er-doped fiber and the Wave decomposing multiplexer of optics main road, in which:
Pumping source, for providing pump light；
Signal source, for providing signal light；
Wavelength division multiplexer obtains complex light for coupling the pump light and signal light；
Er-doped fiber, for absorbing the pump light in the complex light to carry out gain to the signal light in the complex light
Amplification；
Wave decomposing multiplexer, the complex light for exporting Er-doped fiber are decomposed into remnant pump light and output signal light.
In some embodiments of the present disclosure, above-mentioned fiber amplifier further includes the first optical branch, first optical branch
Road includes fiber bragg grating, for reflecting remnant pump light, so that remnant pump light is back to via Wave decomposing multiplexer
Er-doped fiber is absorbed again.
In some embodiments of the present disclosure, the periodic structure of above-mentioned Bragg grating and the wavelength of pump light match.
In some embodiments of the present disclosure, above-mentioned fiber amplifier further includes the second optical branch, second optical branch
Road includes directional coupler and optical circulator, in which:
Optical circulator, for remaining portion of residual pump light after absorbing Er-doped fiber again, via wavelength division multiplexer
It is transmitted to directional coupler；
Directional coupler, as subsequent after the coupling pump light for providing portion of residual pump light again with pumping source
Pump light.
In some embodiments of the present disclosure, above-mentioned optical circulator is three port passive devices, and one of port is only
As input terminal, for inputting the pump light of pumping source offer；Other two port therein is as input/output terminal.
In some embodiments of the present disclosure, above-mentioned fiber amplifier further includes two optoisolators, in which:
One of two optoisolators are placed between wavelength division multiplexer and signal source, for preventing reversed spontaneous spoke
It penetrates noise and is transmitted to signal source along Er-doped fiber；
Two the wherein another of optoisolator are placed in the one end of Wave decomposing multiplexer far from Er-doped fiber, feed back for preventing
The output signal light be back to optics main road.
In some embodiments of the present disclosure, above-mentioned fiber amplifier further includes two tap couplers, in which:
Two tap couplers are located at the both ends of optics main road, are used for comparison signal light and output signal light, obtain
The gain factor of fiber amplifier.
In some embodiments of the present disclosure, the splitting ratio of above-mentioned two tap coupler is equal；Preferably, this two pumpings
The splitting ratio of head coupler is 99: 1 to 95: 5.
In some embodiments of the present disclosure, the wavelength of above-mentioned signal light is greater than the wavelength of pump light；Preferably, signal light
Wavelength be 1550nm, the wavelength of pump light is 980nm.
In some embodiments of the present disclosure, the length and the gain amplification factor phase of fiber amplifier of above-mentioned Er-doped fiber
Matching；Preferably, the length of Er-doped fiber has an optimum value, so that the gain amplification factor of fiber amplifier is maximum.
The fiber amplifier that the disclosure proposes, has the advantages that
1, the signal light and pump light of the disclosure, couples to form complex light by wavelength division multiplexer, so that signal light and pump
Pu light is from same direction injection Er-doped fiber, to reduce the noise coefficient of fiber amplifier；
2, there is fiber bragg grating, so as to return to the unabsorbed pump light of Er-doped fiber in the structure of the disclosure
It is absorbed again to Er-doped fiber, therefore can efficiently utilize pump light, realize the high-gain of fiber amplifier；And the disclosure
Structure can also include directional coupler and optical circulator, so as to by the unabsorbed portion of residual pump light of Er-doped fiber and pump
It reuses after the coupling pump light that Pu source provides again, to can further improve the utilization rate of pump light, further increases
The gain factor of fiber amplifier reduces pumping power consumption；
3, since the structure of the disclosure can significantly increase gain factor, the high-gain of fiber amplifier is realized, therefore only
Using single Er-doped fiber, the fiber amplifier of the disclosure is without using cascade structure, thus realizing the same of high-gain
When can effectively ensure that low-noise factor；
4, the structure of the disclosure further includes two optoisolators, is placed in the both ends of structure, so as to effectively prevent it is reversed from
Influence of the radiated noise to signal source is sent out, guarantee signal source stablizes output；Possible feedback can be prevented to avoid optical fiber simultaneously
Lasing occurs for amplifier；
5, the structure of the disclosure can use the pump light of 980nm wavelength, since the photon energy of 980nm wavelength is high, because
This can realize big population inversion, be further ensured that high-gain；
6, the disclosure repeatedly using remaining pump light, realizes erbium ion using fiber bragg grating and optical circulator
The transition of maximum quantity improves the increasing of amplifier while keeping pumping low-power consumption and single hop Er-doped fiber low-noise factor
Benefit can be used to the amplification for realizing signal in high speed long-distance optical fiber communication system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the fiber amplifier that an embodiment of the disclosure proposes.
Specific embodiment
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
Attached drawing is described in further detail the disclosure.
In the prior art, high-gain fiber amplifier is mainly made of multistage EDFA Erbium-Doped Fiber Amplifier (EDFA) cascade,
Every section of EDFA requires pumping source and provides energy excitation erbium ion, and the noise coefficient that introduces of every section of EDFA can be superimposed cause it is entire
Fiber optic link noise coefficient is very big, influences link performance.
Based on the above issues, present disclose provides a kind of fiber amplifiers, including pumping source, signal source and composition optics
Wavelength division multiplexer, Er-doped fiber and the Wave decomposing multiplexer of main road, in which:
Pumping source, for providing pump light；
Signal source, for providing signal light；
Wavelength division multiplexer obtains complex light for coupling pumping light and signal light；
Er-doped fiber, for absorbing the pump light in complex light to carry out gain amplification to the signal light in complex light；
Wave decomposing multiplexer, the complex light for exporting Er-doped fiber are decomposed into remnant pump light and output signal light.
Therefore, the signal light and pump light of the disclosure, couples to form complex light by wavelength division multiplexer so that signal light and
Pump light is from same direction injection Er-doped fiber, to can effectively reduce the noise coefficient of fiber amplifier.
The wavelength division multiplexer and Wave decomposing multiplexer of the disclosure have double-colored wavelength selectivity, Lai Shixian signal light and pumping
The coupling of light with separate.
In some embodiments of the present disclosure, above-mentioned fiber amplifier further includes the first optical branch, first optical branch
Road includes fiber bragg grating, for reflecting remnant pump light, so that remnant pump light is back to via Wave decomposing multiplexer
Er-doped fiber is absorbed again.
In some embodiments of the present disclosure, above-mentioned fiber amplifier further includes the second optical branch, second optical branch
Road includes directional coupler and optical circulator, in which:
Optical circulator, for remaining portion of residual pump light after absorbing Er-doped fiber again, via wavelength division multiplexer
It is transmitted to directional coupler；
Directional coupler, as subsequent after the coupling pump light for providing portion of residual pump light again with pumping source
Pump light.
Therefore, the unabsorbed pump light of Er-doped fiber can be back to Er-doped fiber and be inhaled again by the structure of the present embodiment
It receives, therefore can efficiently utilize pump light, realize the high-gain of fiber amplifier；And the structure of the present embodiment can also include orientation
Coupler and optical circulator, so as to the pumping for providing the unabsorbed portion of residual pump light of Er-doped fiber and pumping source again
It is reused after optical coupling, realizes the multiple re-absorption for not absorbing pump light, thus can further improve the utilization rate of pump light,
The gain factor of fiber amplifier is further increased, pumping power consumption is reduced.
In some embodiments of the present disclosure, the periodic structure of above-mentioned Bragg grating and the wavelength of pump light match.
Specifically, Bragg grating is a kind of periodic structure formed in a fiber using light Writing Technology, the reason of structure design
It is Bragg equation by foundation, to realize the transmission and reflection to pump light.
In some embodiments of the present disclosure, above-mentioned optical circulator is three port passive devices, and one of port is only
As input terminal, for inputting the pump light of pumping source offer；Other two port therein is as input/output terminal.
In some embodiments of the present disclosure, above-mentioned fiber amplifier further includes two optoisolators, in which:
One of two optoisolators are placed between wavelength division multiplexer and signal source, for preventing reversed spontaneous spoke
It penetrates noise and is transmitted to signal source along Er-doped fiber, to guarantee that stablizing for signal source exports；
Two the wherein another of optoisolator are placed in the one end of Wave decomposing multiplexer far from Er-doped fiber, feed back for preventing
Light is back to optics main road, that is, prevents possible feedback back to amplifier, so that can avoid amplifier occurs lasing.
Preferably, two optoisolators are to polarization insensitive.
In some embodiments of the present disclosure, above-mentioned fiber amplifier further includes two tap couplers, in which:
Two tap couplers are located at the both ends of optics main road, are used for comparison signal light and output signal light, obtain
The gain factor of fiber amplifier.
Preferably, the splitting ratio of above-mentioned two tap coupler is equal；It is arranged according to usual, two tap couplers
Splitting ratio can be 99: 1 to 95: 5.
In some embodiments of the present disclosure, the wavelength of above-mentioned signal light is greater than the wavelength of pump light；Preferably, signal light
Wavelength be 1550nm, the wavelength of pump light is 980nm.Therefore, the fiber amplifier of the present embodiment can be applied to optic communication neck
Domain, and due to the photon energy of 980nm wavelength height, so the noise for using it to generate as pump light is lower and can obtain larger
Population inversion, to be advantageously implemented high-gain.
In some embodiments of the present disclosure, the length and the gain amplification factor phase of fiber amplifier of above-mentioned Er-doped fiber
Matching；Preferably, the length of Er-doped fiber has an optimum value, so that the gain amplification factor of fiber amplifier is maximum.This be because
It is Er-doped fiber as gain media, fiber lengths will affect amplifier gain, so first theoretical calculation goes out EDFA gain and light
The relationship of fine length, so that it is determined that the optimum length of optical fiber, to realize high-gain as far as possible.
Below by way of specific embodiment, the fiber amplifier proposed to the disclosure is described in detail.
Embodiment
As shown in Figure 1, present embodiments providing a kind of low-noise factor high-gain optical fiber efficiently utilized based on pump light
Amplifier, the fiber amplifier include pumping source laser 1, tap coupler 2 and 8, optoisolator 3 and 7, wavelength division multiplexer 4,
Er-doped fiber 5, Wave decomposing multiplexer 6, fiber bragg grating 9, optical circulator 10, directional coupler 11 and signal optical source 12,
Wherein:
The pump wavelength of the transmitting of pumping source laser 1 is 980nm, and the wavelength for the signal light that signal optical source 12 emits is
1550nm；Optical circulator 10 is unidirectional three port passives device, and port 1 is only used as input port, the conduct input of port 2 and 3/defeated
Exit port, wherein export from the input of port 1 from port 2, exported from the input of port 2 from port 3.It is specific:
Pumping source laser 1, for providing energy, ground state electron in pump photon directly excitation erbium ion energy level is to swashing
Some energy can be discharged and relaxation is to stimulated radiation energy level quickly after electronics reaches excitation state by sending out state, at this energy level, letter
Number photon triggers it and generates stimulated radiation, and remaining energy is discharged in the form of generating new photon, and the wavelength of new photon is equal to letter
The wavelength of number light, the final amplification for realizing signal light；
Tap coupler 2 and 8, for input signal and the output signal of amplification to be compared, two tap couplers
The equal splitting ratio of device is 97: 1, therefore comparison result is not influenced by wavelength；
The optoisolator 3 of input terminal influences signal for preventing reversed spontaneous emission noise (ASE) from returning along optical fiber
Source makes to export photo-labile；
The optoisolator 7 of output end, for preventing possible feedback (feedback of such as output signal light) to avoid amplifier
Lasing occurs；
Wavelength division multiplexer 4, for be 1550nm by wavelength signal light and wavelength be 980nm coupling pump light it is jointly defeated
Enter into erbium-doped fiber and realizes signal light amplification；
Erbium-doped fiber 5, as gain media；
Wave decomposing multiplexer 6, for dividing mixed 1550nm signal light and the 980nm pump light not being fully used
It opens, is used as signal light output all the way；Another way is input in fiber bragg grating 9；
Fiber bragg grating 9, for reflecting the 980nm pump light not being completely absorbed, return it to erbium-doped fiber into
Row excites erbium ion again；
Optical circulator 10, for making reflected 980nm remnant pump light directional transmissions to 3 ports of circulator, from
And with original coupling pump light；
Directional coupler 11, for pump light and reflected remnant pump light to be combined as pump light.
Specifically, the signal light of 1550nm wavelength is input in wavelength division multiplexer 4 by tap coupler, optoisolator,
Optoisolator 3 influences signal source for preventing reversed spontaneous emission noise (ASE) from returning along optical fiber herein, keeps output light unstable
Fixed, the pumping source laser 1 of 980nm wavelength is transferred in wavelength division multiplexer 4 by directional coupler 11 and optical circulator 10,
The signal light of 1550nm and the pump light of 980nm are coupled by wavelength division multiplexer 4, are injected into doped fiber in the same direction,
That is Pumped, pump light, which provides energy, makes the ground state electron in the erbium ion energy level in Er-doped fiber transit to excitation state, real
Existing population inversion can discharge some energy and relaxation is to stimulated radiation energy level quickly, in this energy after electronics reaches excitation state
In grade, signal photon triggers it and generates stimulated radiation, and remaining energy, the wavelength of new photon are discharged in the form of generating new photon
Equal to the wavelength of signal light, to realize the amplification to signal light.
Er-doped fiber 5 is used as gain media, and doping erbium ion is in order to make its work communicate common C-band, herein
Signal light wavelength is set as 1550nm, and Wave decomposing multiplexer 6 realizes the light of 1550nm wavelength and the pump of unemployed 980nm wavelength
The separation of Pu light, wherein the light of 1550nm is exported by optoisolator 7 and tap coupler 8, and optoisolator 7 herein is for preventing
Only to avoid amplifier lasing occurs for possible feedback, can be by input light function with the identical tap coupler 2 and 8 for taking out light ratio
Rate and amplified Output optical power are compared, and then obtain amplifier gain.
The another way wavelength separated by Wave decomposing multiplexer 6 is that the pump light of 980nm is input to fiber bragg grating 9
In, it is returned in Er-doped fiber 5 by the reflection of fiber bragg grating 9, excites the ground state electricity in erbium ion energy level again
Son realizes light amplification again to generate stimulated radiation under the triggering of signal light to excitation state；Current amplification is not complete
The pump light of the 980nm of complete utilization is input in 2 ports of circulator 10 by wavelength division multiplexer 4, due to optical circulator 10
Characteristic, pump light will be exported from 3 ports of optical circulator 10, the output light and pumping source laser 1 of 3 ports of optical circulator 10
Output light by 11 coupling input of directional coupler into 1 port of optical circulator 10, port 1 by port 2 into then being gone out, port
2 output light is entered in Er-doped fiber 5 by wavelength division multiplexer and provides energy, so not increasing the i.e. energy consumption of pump power
Situation realizes the efficient utilization of pump light；
In the present embodiment.In the present embodiment, input optical signal wavelength is 1550nm, the wavelength of pumping source laser 1
Photon energy for 980nm, 980nm wavelength is high, so the noise for using it to generate as pump light is lower and can obtain larger
Population inversion；As long as tap coupler 2 and 8 guarantees that tapping ratio is identical；Optoisolator 3 and 7 should be unrelated with polarization；
Wavelength division multiplexer 4 and Wave decomposing multiplexer 6 are the coupling for realizing the light of 980nm and 1550nm wavelength and the bitintability wavelength separated
Select coupler；Er-doped fiber 5 is used as gain media, and fiber lengths will affect amplifier gain, so first theoretical calculation goes out
The relationship of EDFA gain and fiber lengths, so that it is determined that the optimum length of optical fiber；Fiber bragg grating 9 is that skill is written using light
A kind of periodic structure that art is formed in a fiber, may be implemented the transmission and reflection to 980nm light；Directional coupler 11 is 2 × 2
Passive coupler.Unemployed pump light is realized according to the characteristic of 10 one-way transmission light of optical circulator and directional coupler 11
It returns and is again introduced into optical fiber with former coupling pump light, thus under conditions of not increasing pump power and cascading other EDFA, it is real
The fiber amplifier of existing low-noise factor high-gain.
To sum up, the low-noise factor high-gain fiber amplifier provided through this embodiment can not increase pumping function
In the case where consumption and noise coefficient, the light amplification of high-gain is realized, the light in the optical fiber telecommunications system of high speed long range is believed
Number amplification has very important significance.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail bright, it should be understood that the foregoing is merely the specific embodiment of the disclosure, be not limited to the disclosure, it is all
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the protection of the disclosure
Within the scope of.
Claims (11)
1. a kind of fiber amplifier, including pumping source, signal source and the wavelength division multiplexer, Er-doped fiber, the wave that constitute optics main road
Decomposition multiplex device, the first optical branch and the second optical branch, in which:
Pumping source, for providing pump light；
Signal source, for providing signal light；
Wavelength division multiplexer obtains complex light for coupling the pump light and signal light；
Er-doped fiber, for absorbing the pump light in the complex light to carry out gain to the signal light in the complex light and put
Greatly；
Wave decomposing multiplexer, the complex light for exporting Er-doped fiber are decomposed into remnant pump light and output signal light；
First optical branch, including fiber bragg grating, for reflecting the remnant pump light, so that the remnant pump light
The Er-doped fiber is back to via the Wave decomposing multiplexer to be absorbed again；
Second optical branch includes directional coupler and optical circulator, in which:
Optical circulator, for remaining portion of residual pump light after absorbing the Er-doped fiber again, via wavelength division multiplexer
It is transmitted to the directional coupler；And the pump light that the directional coupler exports is transmitted to the wavelength division multiplexer；
Directional coupler, as subsequent after the coupling pump light for providing the portion of residual pump light again with pumping source
Pumping light output.
2. fiber amplifier as described in claim 1, wherein the periodic structure of the Bragg grating and the pump light
Wavelength matches.
3. fiber amplifier as described in claim 1, wherein the optical circulator be three port passive devices, therein one
A port is only used as input terminal, the pump light provided for inputting the pumping source；Conduct input in other two port therein/
Output end.
4. fiber amplifier as described in claim 1 further includes two optoisolators, in which:
One of described two optoisolators are placed between the wavelength division multiplexer and signal source, for prevent it is reversed from
It sends out radiated noise and is transmitted to signal source along the Er-doped fiber；
The wherein another of described two optoisolators is placed in the one end of the Wave decomposing multiplexer far from Er-doped fiber, for preventing
The output signal light of feedback is back to the optics main road.
5. fiber amplifier as described in claim 1 further includes two tap couplers, in which:
Described two tap couplers are located at the both ends of the optics main road, are used for the signal light and output signal
Light obtains the gain factor of the fiber amplifier.
6. fiber amplifier as claimed in claim 5, wherein the splitting ratio of described two tap couplers is equal.
7. fiber amplifier as claimed in claim 6, wherein the splitting ratio of two tap couplers is 99:1 to 95:5.
8. fiber amplifier as described in claim 1, wherein the wavelength of the signal light is greater than the wavelength of the pump light.
9. fiber amplifier as described in claim 1, wherein the wavelength of the signal light is 1550nm, the pump light
Wavelength is 980nm.
10. fiber amplifier as described in claim 1, wherein the length of the Er-doped fiber and the fiber amplifier
Gain amplification factor matches.
11. fiber amplifier as claimed in claim 10, wherein the length of the Er-doped fiber has an optimum value, so that
The gain amplification factor of the fiber amplifier is maximum.
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| CN107678224A (en) * | 2017-11-14 | 2018-02-09 | 中国电子科技集团公司第三十四研究所 | A kind of luminous signal amplification method and amplifying device based on twin-stage Er-doped fiber |
| CN108649415B (en) * | 2018-05-16 | 2020-04-03 | 深圳大学 | Thulium-doped optical fiber laser amplifier |
| CN109687272A (en) * | 2019-03-01 | 2019-04-26 | 电子科技大学 | Er-doped microsphere laser device based on Microsphere Cavities feedback |
| CN110212872B (en) * | 2019-07-05 | 2023-08-08 | 电子科技大学 | Microwave amplifier and implementation method thereof |
| CN113097841A (en) * | 2019-12-23 | 2021-07-09 | 中兴通讯股份有限公司 | Optical amplifier |
| CN112117628A (en) * | 2020-07-31 | 2020-12-22 | 武汉光谷航天三江激光产业技术研究院有限公司 | Optical fiber laser amplifier with high stimulated Brillouin scattering threshold value and high conversion efficiency |
| CN111964700B (en) | 2020-08-28 | 2021-06-04 | 武汉理工大学 | Distributed pulse light amplifier based on optical fiber parametric amplification and performance characterization method |
| CN114337826A (en) * | 2020-09-30 | 2022-04-12 | 华为技术有限公司 | Optical amplification device and multiport wavelength division multiplexing coupler |
| CN113507033A (en) * | 2021-06-29 | 2021-10-15 | 天津弘毅光技术有限公司 | Low-noise optical fiber amplifier based on optical fiber mode field adapter |
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| CN103022866A (en) * | 2012-12-17 | 2013-04-03 | 北京化工大学 | Modulated oscillator power amplifier (MOPA) type random fiber optic laser device |
| CN204190155U (en) * | 2014-11-19 | 2015-03-04 | 天津光电通信技术有限公司 | A kind of image intensifer |
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