CN107154575A - Fiber amplifier - Google Patents
Fiber amplifier Download PDFInfo
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- CN107154575A CN107154575A CN201710504886.7A CN201710504886A CN107154575A CN 107154575 A CN107154575 A CN 107154575A CN 201710504886 A CN201710504886 A CN 201710504886A CN 107154575 A CN107154575 A CN 107154575A
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- light
- pump light
- fiber
- fiber amplifier
- flashlight
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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
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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
- H01S3/0675—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
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
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, wherein：Pumping source, for providing pump light；Signal source, for providing flashlight；Wavelength division multiplexer, complex light is obtained for coupling pumping light and flashlight；Er-doped fiber, for absorbing the pump light in complex light with to the flashlight progress gain amplification in complex light；Wave decomposing multiplexer, for gain to be amplified after complex light be decomposed into remnant pump light and output signal light.The flashlight and pump light of the disclosure, couple to form complex light by wavelength division multiplexer so that flashlight and pump light are from same direction injection Er-doped fiber, so as to reduce the noise coefficient of fiber amplifier；And the fiber amplifier of the disclosure can significantly increase gain factor, the high-gain of fiber amplifier is realized.
Description
Technical field
The disclosure belongs to fiber optic communication field, relates more specifically to a kind of fiber amplifier.
Background technology
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
Influence that fibre loss transmits to signal is taken, it is necessary to carry out regenerative repeating to the optical signal decayed every a certain distance.And
, it is necessary to carry out opto-electronic conversion, electrically amplified, timing, shaping pulse and electro-optic conversion again during traditional repeater amplification optical signal,
Although this process is very applicable for the Single wavelength of moderate rate, do not applied to then for high speed multi-wavelength system, 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 the relay amplifier in long haul communications systems, the power ascension as 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 it is used as orphan's energy compensating amplifier in high speed Long Distance Optical Soliton Communication System.
The fiber amplifier communication link of high-gain is needed some, the scheme that is often cascaded using multiple EDFA, but
While gain is improved, chain noise factor and length can all increase, and cause link performance to decline.
Disclosure
Based on above technical problem, the main purpose of the disclosure is to propose a kind of fiber amplifier, more than solution
At least one of technical problem.
To achieve these goals, the present disclosure proposes a kind of fiber amplifier, including pumping source, signal source and composition
Wavelength division multiplexer, Er-doped fiber and the Wave decomposing multiplexer of optics main road, wherein：
Pumping source, for providing pump light；
Signal source, for providing flashlight；
Wavelength division multiplexer, complex light is obtained for coupling the pump light and flashlight；
Er-doped fiber, for absorbing the pump light in the complex light with to the flashlight progress gain in the complex light
Amplification；
Wave decomposing multiplexer, the complex light for Er-doped fiber to be exported is decomposed into remnant pump light and output signal light.
In some embodiments of the present disclosure, above-mentioned fiber amplifier also includes the first optical branch, first optical branch
Road includes Fiber Bragg Grating FBG, 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 also includes the second optical branch, second optical branch
Road includes directional coupler and optical circulator, wherein：
Optical circulator, for Er-doped fiber to be absorbed again after remaining portion of residual pump light, via wavelength division multiplexer
Transmit to directional coupler；
Directional coupler, for using after the coupling pump light that portion of residual pump light and pumping source are provided again as subsequently
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, the pump light for inputting pumping source offer；Two other port therein is used as input/output terminal.
In some embodiments of the present disclosure, above-mentioned fiber amplifier also includes two optoisolators, wherein：
One of two optoisolators are placed between wavelength division multiplexer and signal source, for preventing reverse spontaneous spoke
Noise is penetrated to transmit to signal source along Er-doped fiber；
Two the wherein another of optoisolator are placed in the one end of Wave decomposing multiplexer away from Er-doped fiber, for preventing feedback
The output signal light be back to optics main road.
In some embodiments of the present disclosure, above-mentioned fiber amplifier also includes two tap couplers, wherein：
Two tap couplers are located at the two ends of optics main road respectively, 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, take out for this two
The splitting ratio of head coupler is 99: 1 to 95: 5.
In some embodiments of the present disclosure, the wavelength of above-mentioned flashlight is more than the wavelength of pump light；Preferably, flashlight
Wavelength be 1550nm, the wavelength of pump light is 980nm.
In some embodiments of the present disclosure, the length of above-mentioned Er-doped fiber and the gain multiplication factor phase of fiber amplifier
Matching；Preferably, the length of Er-doped fiber has an optimum value, so that the gain multiplication factor of fiber amplifier is maximum.
The fiber amplifier that the disclosure is proposed, has the advantages that：
1st, the flashlight and pump light of the disclosure, couple to form complex light by wavelength division multiplexer so that flashlight and pump
Pu light is from same direction injection Er-doped fiber, so as to reduce the noise coefficient of fiber amplifier；
2nd, there is Fiber Bragg Grating FBG, so as to which the unabsorbed pump light of Er-doped fiber is returned in the structure of the disclosure
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
Reused after the coupling pump light that Pu source is provided again, so that the utilization rate of pump light is can further improve, further increase
The gain factor of fiber amplifier, reduces pumping power consumption；
3rd, because 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, so as to realize the same of high-gain
When can effectively ensure that low-noise factor；
4th, the structure of the disclosure also includes two optoisolators, is placed in the two ends of structure, so as to effectively prevent it is reverse from
Send out influence of the radiated noise to signal source, it is ensured that the stable output of signal source；It can prevent possible feedback from avoiding optical fiber simultaneously
Lasing occurs for amplifier；
5th, the structure of the disclosure can use the pump light of 980nm wavelength, because the photon energy of 980nm wavelength is high, because
This can realize big population inversion, be further ensured that high-gain；
6th, the disclosure repeatedly using remaining pump light, realizes erbium ion using Fiber Bragg Grating FBG and optical circulator
The transition of maximum quantity, improves the increasing of amplifier while pumping low-power consumption and single hop Er-doped fiber low-noise factor is kept
Benefit, can be used to realize the amplification of signal in high speed long-distance optical fiber communication system.
Brief description of the drawings
Fig. 1 is the structural representation of the fiber amplifier of the embodiment proposition of the disclosure.
Embodiment
For the purpose, technical scheme and advantage of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
Accompanying drawing, is described in further detail to the disclosure.
In the prior art, high-gain fiber amplifier is mainly made up of multistage EDFA Erbium-Doped Fiber Amplifier (EDFA) cascade,
Every section of EDFA is required for pumping source to provide energy excitation erbium ion, and the noise coefficient that introduces of every section of EDFA can be superimposed cause it is whole
Fiber optic link noise coefficient is very big, influences link performance.
Based on above mentioned problem, present disclose provides a kind of fiber amplifier, including pumping source, signal source and composition optics
Wavelength division multiplexer, Er-doped fiber and the Wave decomposing multiplexer of main road, wherein：
Pumping source, for providing pump light；
Signal source, for providing flashlight；
Wavelength division multiplexer, complex light is obtained for coupling pumping light and flashlight；
Er-doped fiber, for absorbing the pump light in complex light with to the flashlight progress gain amplification in complex light；
Wave decomposing multiplexer, the complex light for Er-doped fiber to be exported is decomposed into remnant pump light and output signal light.
Therefore, the flashlight and pump light of the disclosure, couple to form complex light by wavelength division multiplexer so that flashlight and
Pump light is from same direction injection Er-doped fiber, so as to the noise coefficient of effectively reduction fiber amplifier.
The wavelength division multiplexer and Wave decomposing multiplexer of the disclosure have double-colored wavelength selectivity, to realize flashlight and pumping
The coupling of light is with separating.
In some embodiments of the present disclosure, above-mentioned fiber amplifier also includes the first optical branch, first optical branch
Road includes Fiber Bragg Grating FBG, 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 also includes the second optical branch, second optical branch
Road includes directional coupler and optical circulator, wherein：
Optical circulator, for Er-doped fiber to be absorbed again after remaining portion of residual pump light, via wavelength division multiplexer
Transmit to directional coupler；
Directional coupler, for using after the coupling pump light that portion of residual pump light and pumping source are provided again as subsequently
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
Receive, 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
Reused after optical coupling, realize the multiple re-absorption of non-absorptive pumping light, so that the utilization rate of pump light is can further improve,
Further increase the gain factor of fiber amplifier, reduce pumping power consumption.
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 the structure design
By according to being Bragg equation, 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, the pump light for inputting pumping source offer；Two other port therein is used as input/output terminal.
In some embodiments of the present disclosure, above-mentioned fiber amplifier also includes two optoisolators, wherein：
One of two optoisolators are placed between wavelength division multiplexer and signal source, for preventing reverse spontaneous spoke
Penetrate noise to transmit to signal source along Er-doped fiber, so as to ensure the stable output of signal source；
Two the wherein another of optoisolator are placed in the one end of Wave decomposing multiplexer away from Er-doped fiber, for preventing feedback
Light is back to optics main road, that is, prevents possible feedback from returning to amplifier, so as to avoid amplifier from occurring lasing.
Preferably, two optoisolators are to polarization insensitive.
In some embodiments of the present disclosure, above-mentioned fiber amplifier also includes two tap couplers, wherein：
Two tap couplers are located at the two ends of optics main road respectively, 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；According to usual setting, two tap couplers
Splitting ratio can be 99: 1 to 95: 5.
In some embodiments of the present disclosure, the wavelength of above-mentioned flashlight is more than the wavelength of pump light；Preferably, flashlight
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 because the photon energy of 980nm wavelength is high, so the noise produced with it as pump light is relatively low and can obtain larger
Population inversion, so as to be advantageously implemented high-gain.
In some embodiments of the present disclosure, the length of above-mentioned Er-doped fiber and the gain multiplication factor phase of fiber amplifier
Matching；Preferably, the length of Er-doped fiber has an optimum value, so that the gain multiplication factor of fiber amplifier is maximum.This be because
It is Er-doped fiber as gain media, fiber lengths can influence amplifier gain, so first theoretical calculation goes out EDFA gains and light
The relation 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 that the disclosure is proposed 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 FBG 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 flashlight that signal optical source 12 is launched is
1550nm；Optical circulator 10 is unidirectional three port passives device, and port 1 is only as input port, the conduct input of port 2 and 3/defeated
Exit port, wherein, export, exported from the input of port 2 from port 3 from port 2 from the input of port 1.Specifically：
Pumping source laser 1, for provide the ground state electron in energy, pump photon directly excitation erbium ion energy level to swash
State is sent out, electronics reaches after excitation state, can discharge some energy and relaxation is to stimulated radiation energy level quickly, on this energy level, letter
Number photon triggers it and produces stimulated radiation, and remaining energy is discharged in the form of producing new photon, and the wavelength of new photon is equal to letter
The wavelength of number light, finally realizes the amplification of flashlight；
Tap coupler 2 and 8, for the output signal of input signal and amplification to be compared, two tap couplers
The equal splitting ratio of device is 97: 1, therefore comparative result is not influenceed by wavelength；
The optoisolator 3 of input, for preventing reverse spontaneous emission noise (ASE) is returned along optical fiber from influenceing signal
Source, makes output photo-labile；
The optoisolator 7 of output end, for preventing possible feedback (feedback of such as output signal light) from avoiding amplifier
Generation lasing；
Wavelength division multiplexer 4, for be 1550nm by wavelength flashlight and wavelength be 980nm coupling pump light it is jointly defeated
Enter to realize signal light amplification into erbium-doped fiber；
Erbium-doped fiber 5, is used as gain media；
Wave decomposing multiplexer 6, for the 1550nm flashlights of mixing and the 980nm pump lights not being fully used to be divided
Open, all the way as signal light output；Another road is input in Fiber Bragg Grating FBG 9；
Fiber Bragg Grating FBG 9, for reflecting the 980nm pump lights not being completely absorbed, returns it to erbium-doped fiber and enters
Row excites erbium ion again；
Optical circulator 10, for the 980nm remnant pump light directional transmissions that make to reflect to 3 ports of circulator, from
And with original coupling pump light；
Directional coupler 11, for pump light and the remnant pump light reflected to be combined as into pump light.
Specifically, the flashlight of 1550nm wavelength is input in wavelength division multiplexer 4 by tap coupler, optoisolator,
Optoisolator 3 is used to prevent reverse spontaneous emission noise (ASE) from returning to influence signal source along optical fiber herein, makes 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,
1550nm flashlight and 980nm pump light are coupled by wavelength division multiplexer 4, and doped fiber is injected into 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, electronics reaches after excitation state, can discharge some energy and relaxation is to stimulated radiation energy level quickly, in this energy
In level, signal photon triggers it and produces stimulated radiation, and remaining energy, the wavelength of new photon are discharged in the form of producing new photon
Equal to the wavelength of flashlight, so as to realize the amplification to flashlight.
Er-doped fiber 5 is as gain media, and doping erbium ion is in order that it is operated in the conventional C-band of communication, herein
Signal light wavelength is set to 1550nm, and Wave decomposing multiplexer 6 realizes the light of 1550nm wavelength and the pump of unemployed 980nm wavelength
The light of the separation of Pu light, wherein 1550nm is exported by optoisolator 7 and tap coupler 8, and optoisolator 7 herein is used to prevent
Only it is possible feedback with avoid amplifier occur lasing, with it is identical take out light than tap coupler 2 and 8 can be by input light work(
Output optical power after rate and amplification is compared, and then draws amplifier gain.
Another road wavelength separated by Wave decomposing multiplexer 6 is input to Fiber Bragg Grating FBG 9 for 980nm pump light
In, returned to by the reflection of Fiber Bragg Grating FBG 9 in Er-doped fiber 5, the ground state electricity in erbium ion energy level is excited again
Son arrives excitation state, so as to produce stimulated radiation under the triggering of flashlight, realizes light amplification again；Current amplification is not complete
The 980nm of complete utilization pump light 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, output light and the pumping source laser 1 of 3 ports of optical circulator 10
Output light by directional coupler 11 coupling be input in 1 port of optical circulator 10, port 1 is entered, and is gone out by port 2, 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
For 980nm, the photon energy height of 980nm wavelength, so the noise produced with it as pump light is relatively low and can obtain larger
Population inversion；As long as tap coupler 2 ensures that tapping ratio is identical with 8；Optoisolator 3 and 7 should be unrelated with polarization；
Wavelength division multiplexer 4 and Wave decomposing multiplexer 6 are the coupling for the light for realizing 980nm and 1550nm wavelength and the bitintability wavelength separated
Select coupler；Er-doped fiber 5 can influence amplifier gain as gain media, fiber lengths, so first theoretical calculation goes out
EDFA gains and the relation of fiber lengths, so that it is determined that the optimum length of optical fiber；Fiber Bragg Grating FBG 9 is to write skill using light
A kind of periodic structure that art is formed in a fiber, it is possible to achieve the transmission and reflection to 980nm light；Directional coupler 11 is 2 × 2
Passive coupler.Unemployed pump light is realized according to the characteristic and directional coupler 11 of the one-way transmission light of optical circulator 10
Return and be again introduced into optical fiber with former coupling pump light, so that 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 by the present embodiment, can not increase pumping work(
In the case of consumption and noise coefficient, the light amplification of high-gain is realized, is believed for the light in the optical fiber telecommunications system of high speed long range
Number amplification has very important significance.
Particular embodiments described above, purpose of this disclosure, technical scheme and beneficial effect have been carried out further in detail
Describe in detail bright, it should be understood that the foregoing is only 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 and improvements done etc. should be included in the protection of the disclosure
Within the scope of.
Claims (10)
1. a kind of fiber amplifier, including pumping source, signal source and constitute the wavelength division multiplexer of optics main road, Er-doped fiber and
Wave decomposing multiplexer, wherein：
Pumping source, for providing pump light；
Signal source, for providing flashlight；
Wavelength division multiplexer, complex light is obtained for coupling the pump light and flashlight；
Er-doped fiber, is put for absorbing the pump light in the complex light with carrying out gain to the flashlight in the complex light
Greatly；
Wave decomposing multiplexer, the complex light for Er-doped fiber to be exported is decomposed into remnant pump light and output signal light.
2. fiber amplifier as claimed in claim 1, in addition to the first optical branch, first optical branch include optical fiber cloth
Glug grating, for reflecting the remnant pump light, so that the remnant pump light is back to via the Wave decomposing multiplexer
The Er-doped fiber is absorbed again.
3. fiber amplifier as claimed in claim 2, wherein, the periodic structure of the Bragg grating and the pump light
Wavelength matches.
4. fiber amplifier as claimed in claim 2, in addition to the second optical branch, second optical branch include orientation coupling
Clutch and optical circulator, wherein：
Optical circulator, for the Er-doped fiber to be absorbed again after remaining portion of residual pump light, via wavelength division multiplexer
Transmit to the directional coupler；
Directional coupler, for using after the coupling pump light that the portion of residual pump light and pumping source are provided again as subsequently
Pump light.
5. fiber amplifier as claimed in claim 4, wherein, the optical circulator is three port passive devices, therein one
Individual port is only as input, for inputting the pump light that the pumping source is provided；Two other port therein as input/
Output end.
6. fiber amplifier as claimed in claim 1, in addition to two optoisolators, wherein：
One of described two optoisolators are placed between the wavelength division multiplexer and signal source, for prevent it is reverse from
Hair radiated noise 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 away from Er-doped fiber, for preventing
The output signal light of feedback is back to the optics main road.
7. fiber amplifier as claimed in claim 1, in addition to two tap couplers, wherein：
Described two tap couplers are located at the two ends of the optics main road respectively, for comparing the flashlight and output signal
Light, obtains the gain factor of the fiber amplifier.
8. fiber amplifier as claimed in claim 7, wherein, the splitting ratio of described two tap couplers is equal；Preferably,
The splitting ratio of two tap couplers is 99: 1 to 95: 5.
9. fiber amplifier as claimed in claim 1, wherein, the wavelength of the flashlight is more than the wavelength of the pump light；
Preferably, the wavelength of the flashlight is 1550nm, and the wavelength of the pump light is 980nm.
10. fiber amplifier as claimed in claim 1, wherein, the length of the Er-doped fiber and the fiber amplifier
Gain multiplication factor matches；Preferably, the length of the Er-doped fiber has an optimum value, so that the fiber amplifier
Gain multiplication factor 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 |
| CN108649415A (en) * | 2018-05-16 | 2018-10-12 | 深圳大学 | A kind of 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 |
| CN110212872A (en) * | 2019-07-05 | 2019-09-06 | 电子科技大学 | Microwave amplifier and its implementation |
| CN111964700A (en) * | 2020-08-28 | 2020-11-20 | 武汉理工大学 | Distributed pulse light amplifier based on optical fiber parametric amplification and performance characterization method |
| 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 |
| WO2021129576A1 (en) * | 2019-12-23 | 2021-07-01 | 中兴通讯股份有限公司 | Optical amplifier |
| 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 |
| WO2022068711A1 (en) * | 2020-09-30 | 2022-04-07 | 华为技术有限公司 | Optical amplification device and multi-port wavelength division multiplexing coupler |
| CN115173200A (en) * | 2022-08-18 | 2022-10-11 | 北京交通大学 | Optical fiber amplifier for realizing two-stage bidirectional pumping light splitting double amplification by single pump |
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| CN108649415A (en) * | 2018-05-16 | 2018-10-12 | 深圳大学 | A kind of thulium doped optical fiber laser amplifier |
| 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 |
| CN110212872A (en) * | 2019-07-05 | 2019-09-06 | 电子科技大学 | Microwave amplifier and its implementation |
| CN110212872B (en) * | 2019-07-05 | 2023-08-08 | 电子科技大学 | Microwave amplifier and implementation method thereof |
| WO2021129576A1 (en) * | 2019-12-23 | 2021-07-01 | 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 |
| US11462880B2 (en) | 2020-08-28 | 2022-10-04 | Wuhan University Of Technology | Distributed pulsed light amplifier based on optical fiber parameter amplification, and amplification and performance characterization method |
| CN111964700A (en) * | 2020-08-28 | 2020-11-20 | 武汉理工大学 | Distributed pulse light amplifier based on optical fiber parametric amplification and performance characterization method |
| WO2022068711A1 (en) * | 2020-09-30 | 2022-04-07 | 华为技术有限公司 | Optical amplification device and multi-port 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 |
| CN115173200A (en) * | 2022-08-18 | 2022-10-11 | 北京交通大学 | Optical fiber amplifier for realizing two-stage bidirectional pumping light splitting double amplification by single pump |
| CN115173200B (en) * | 2022-08-18 | 2024-06-28 | 北京交通大学 | Optical fiber amplifier for realizing two-stage bidirectional pumping light splitting double amplification by single pump |
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