CN102570257B - Full optical fiber annular amplifier - Google Patents
Full optical fiber annular amplifier Download PDFInfo
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- CN102570257B CN102570257B CN201210060994.7A CN201210060994A CN102570257B CN 102570257 B CN102570257 B CN 102570257B CN 201210060994 A CN201210060994 A CN 201210060994A CN 102570257 B CN102570257 B CN 102570257B
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Abstract
A full optical fiber annular amplifier comprises a seed source and a pump source. A beam combiner, a wavelength division multiplexer, a rare-earth element doped optical fiber, a beam splitter, a feedback link and a band pass filter are connected in turn to form an annular structure, continuous laser output from the seed source enters into the rare-earth element doped optical fiber via the beam combiner and the wavelength division multiplexer, pump light output from the pump source enters into the rare-earth element doped optical fiber via the wavelength division multiplexer to amplify the seed laser, the amplified seed laser is split into two parts by the beam splitter, one part of the seed laser is output through an output end and the other part enters into the beam combiner via the feedback link and the band pass filter. The full optical fiber annular amplifier has advantages of simple structure, low cost and stable performance, better performance in prevention against the spontaneous amplification radiation and harmful non-linear effect and obvious effect of increasing output power of the optical fiber amplifier to realize high-gain and high-power amplification output.
Description
Technical field
The present invention relates to fiber amplifier, particularly a kind of full fiber amplifier of loop configuration, to suppress spontaneous amplification radiation, improves multiplication factor and the power output of amplifier.
Background technology
In the application of high-power fiber amplifier, people are more and more higher to the requirement of power output.Owing to being limited to spontaneous amplification radiation and harmful nonlinear effect, common fiber amplifier is difficult to realize high-amplification-factor and high-power output; There is complex structure in cascade amplification system, cost is expensive, the shortcomings such as poor reliability, and practicality is not good.
Summary of the invention
The object of the invention is to overcome the problem of above-mentioned existing fiber amplifier, a kind of full optical fiber annular amplifier is provided, this amplifier should have simple in structure, with low cost, steady performance, preventing that performance is better aspect spontaneous amplification radiation and harmful nonlinear effect, the lifting of output power for fibre amplifier is had to positive effect, can realize high-gain, powerful amplification output.
The technology of the present invention solution is as follows:
A kind of full optical fiber annular amplifier, comprise seed source, its feature is: successively by bundling device, wavelength division multiplexer, rare earth-doped fiber, beam splitter, the feedback link looping structure that is connected with band pass filter, the continuous laser of described seed source output is through described bundling device, wavelength division multiplexer enters described rare earth-doped fiber, the pump light of pumping source output enters after described rare earth-doped fiber amplifies described seed laser and is divided into two parts by described beam splitter through described wavelength division multiplexer, a part is through output output, another part enters described bundling device through feedback link and band pass filter, the pumping light power of described pumping source output is continuously adjustable.
Described rare earth-doped fiber is single cladded fiber, doubly clad optical fiber or photonic crystal fiber, more than will reaching 20dB to the absorption of pump light.
Described beam splitter will guarantee that power that laser enters described output is 1～1000 times of power that enters described feedback link.
Ruuning situation of the present invention should be: when the firm entry into service of amplifier, described pumping source is exported minimum power.By the time the laser after amplifying starts from described output output, then the power output that slowly strengthens described pumping source is until maximum.The described pumping source power output institute's elapsed time that often doubles must not be shorter than laser and returns along bundling device, wavelength division multiplexer, rare earth-doped fiber, beam splitter, feedback link and band pass filter the time that bundling device spends.
Technique effect of the present invention:
When amplifier of the present invention has just come into operation, pumping source adopts minimum power output, to guarantee not occur spontaneous amplification radiation and harmful nonlinear effect in the process of laser amplifier.Laser after amplification is divided into two parts after beam splitter, and a part is as power output, and another part is got back to bundling device by feedback link, as the part of seed laser, re-injects in rare earth-doped fiber and amplifies.In this process, the seed light power of amplifier is improved, and just can suitably improve the power output of pumping source, and the power output of amplifier is further increased, and the power that enters feedback link just increases, and has further promoted seed light power.In this simultaneously, use the bandwidth in band pass filter restriction annular chamber, suppress the vibration of annular chamber itself.So circulation, can spontaneous amplification radiation and harmful nonlinear effect suppressed in good situation, constantly increase the power output of amplifier, until the power of pumping source while reaching maximum, obtains the highest power stage.
Compare with technology formerly, simple in structure, with low cost and steady performance that the present invention has, preventing that performance is better aspect spontaneous amplification radiation and harmful nonlinear effect, lifting to output power for fibre amplifier has positive effect, can realize high-gain, powerful amplification output.
Accompanying drawing explanation
Fig. 1 is the structural representation of the full optical fiber annular amplifier of the present invention.
Embodiment
First refer to Fig. 1, Fig. 1 is the structural representation of the full optical fiber annular amplifier of the present invention.As seen from the figure, the full optical fiber annular amplifier of the present invention, comprise seed source 1, by the bundling device 2 that is connected successively, wavelength division multiplexer 3, rare earth-doped fiber 4, beam splitter 6, feedback link 8 and band pass filter 9 looping structures, the continuous laser of described seed source 1 output is through described bundling device 2, wavelength division multiplexer 3 enters described rare earth-doped fiber 4, the pump light of pumping source 5 output is divided into two parts by described beam splitter 6 after the seed laser described in described wavelength division multiplexer 3 enters 4 pairs of described rare earth-doped fibers amplifies, a part is through output 7 outputs, another part enters described bundling device 2 through feedback link 8 and band pass filter 9, the pumping light power of described pumping source 5 outputs is continuously adjustable.
The laser 0.1mW of the seed source 1 output 1064nm of the present embodiment is as seed light, and it is that 6 μ m mix ytterbium list cladded fiber 4 that process bundling device 2 and wavelength division multiplexer 3 enter fiber core radius.The peak power output of pumping source 5 is 4W, and pump light is entered and mixed ytterbium list cladded fiber 4 by wavelength division multiplexer 3.The beam splitter 6 that laser after amplification is 1:9 through a splitting ratio is divided into two parts, and 90% laser is exported by delivery 7; 10% laser gets back to by the band pass filter of feedback link 8 and 2nm bandwidth the part that bundling device 2 becomes seed light.During the firm entry into service of amplifier, pumping source power output is set as 50mW, and the power output of amplifier is 8mW.Then slowly increase the power output of pumping source until maximum, the power output of final amplifier can reach 2.7W.
Experiment shows, simple in structure, with low cost and steady performance that the present invention has, preventing that performance is better aspect spontaneous amplification radiation and harmful nonlinear effect, the lifting of output power for fibre amplifier is had to positive effect, can realize high-gain, powerful amplification output.
Claims (3)
1. a full optical fiber annular amplifier, comprise seed source (1), it is characterized in that: successively by bundling device (2), wavelength division multiplexer (3), rare earth-doped fiber (4), beam splitter (6), feedback link (8) and band pass filter (9) looping structure, the continuous laser of described seed source (1) output is through described bundling device (2), wavelength division multiplexer (3) enters described rare earth-doped fiber (4), the pump light of pumping source (5) output enters after described rare earth-doped fiber (4) amplifies described seed laser and is divided into two parts by described beam splitter (6) through described wavelength division multiplexer (3), a part is through output (7) output, another part enters described bundling device (2) through feedback link (8) and band pass filter (9), the pumping light power of described pumping source (5) output is continuously adjustable.
2. according to the full optical fiber annular amplifier described in claim 1, it is characterized in that: described rare earth-doped fiber (4) is single cladded fiber, doubly clad optical fiber or photonic crystal fiber, more than will reaching 20dB to the absorption of pump light.
3. according to the full optical fiber annular amplifier described in claim 1, it is characterized in that: described beam splitter (6) will guarantee that power that laser enters described output (7) is 1～1000 times of power that enters described feedback link (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210060994.7A CN102570257B (en) | 2012-03-09 | 2012-03-09 | Full optical fiber annular amplifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210060994.7A CN102570257B (en) | 2012-03-09 | 2012-03-09 | Full optical fiber annular amplifier |
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| Publication Number | Publication Date |
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| CN102570257A CN102570257A (en) | 2012-07-11 |
| CN102570257B true CN102570257B (en) | 2014-04-09 |
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| CN201210060994.7A Active CN102570257B (en) | 2012-03-09 | 2012-03-09 | Full optical fiber annular amplifier |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103944046A (en) * | 2014-04-04 | 2014-07-23 | 江苏西贝电子网络有限公司 | Feedback filtering optical path for enhancing optical fiber amplifier output |
| CN106451056A (en) * | 2016-12-14 | 2017-02-22 | 上海理工大学 | Active amplification type optical parameter oscillation feedback system |
| CN110031981A (en) * | 2019-04-17 | 2019-07-19 | 柳江 | A kind of laser focusing structure and the product using the structure |
Citations (4)
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|---|---|---|---|---|
| US6185230B1 (en) * | 1997-11-14 | 2001-02-06 | Sdl, Inc. | Resonant pumped short cavity fiber laser |
| CN1343029A (en) * | 2001-09-26 | 2002-04-03 | 天津大学 | Actively mode-locking optical fibre ring laser insensible to polarization with stable cavity length for wavelength locking device |
| CN1448773A (en) * | 2003-04-24 | 2003-10-15 | 上海交通大学 | Low noise index gain blocked erbium-doped amplifier |
| CN1457538A (en) * | 1998-09-18 | 2003-11-19 | 康宁股份有限公司 | Gain control and shaping of EDFAS via dual cavity gain control |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020024706A1 (en) * | 1998-11-06 | 2002-02-28 | Fausto Meli | Multiple-wavelength amplified telecommunications system with gain compensation |
| US6989923B2 (en) * | 2001-08-08 | 2006-01-24 | Photuris, Inc. | Optical amplifier having automatic gain control with improved performance |
| US7042634B2 (en) * | 2002-03-14 | 2006-05-09 | Nippon Telegraph And Telephone Corporation | Optical amplifier |
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2012
- 2012-03-09 CN CN201210060994.7A patent/CN102570257B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6185230B1 (en) * | 1997-11-14 | 2001-02-06 | Sdl, Inc. | Resonant pumped short cavity fiber laser |
| CN1457538A (en) * | 1998-09-18 | 2003-11-19 | 康宁股份有限公司 | Gain control and shaping of EDFAS via dual cavity gain control |
| CN1343029A (en) * | 2001-09-26 | 2002-04-03 | 天津大学 | Actively mode-locking optical fibre ring laser insensible to polarization with stable cavity length for wavelength locking device |
| CN1448773A (en) * | 2003-04-24 | 2003-10-15 | 上海交通大学 | Low noise index gain blocked erbium-doped amplifier |
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| CN102570257A (en) | 2012-07-11 |
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Effective date of registration: 20170112 Address after: 201815 Shanghai City, Jiading District Xing Xian Lu No. 1368 building 3 room 3092 Patentee after: SHANGHAI FEIBO LASER TECHNOLOGIES Co.,Ltd. Address before: 201800 Jiading District 800-211 post office box, Shanghai Patentee before: SHANGHAI INSTITUTE OF OPTICS AND FINE MECHANICS CHINESE ACADEMY OF SCIENCES |
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Address after: 201821 room j2018, building 6, No. 1288, Yecheng Road, Jiading District, Shanghai Patentee after: Shanghai Feibo Laser Technology Co.,Ltd. Address before: Room 3092, Building 3, No. 1368 Xingxian Road, Jiading District, Shanghai, 201815 Patentee before: SHANGHAI FEIBO LASER TECHNOLOGIES Co.,Ltd. |
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