CN101145852A - High-power optical fiber Brillouin amplifier for full optical buffer - Google Patents
High-power optical fiber Brillouin amplifier for full optical buffer Download PDFInfo
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- CN101145852A CN101145852A CNA200710047679XA CN200710047679A CN101145852A CN 101145852 A CN101145852 A CN 101145852A CN A200710047679X A CNA200710047679X A CN A200710047679XA CN 200710047679 A CN200710047679 A CN 200710047679A CN 101145852 A CN101145852 A CN 101145852A
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Abstract
The invention relates to a high power fiber Brillouin amplifier used in a full-optical buffer in the optical communication technology field. The invention comprises a tunable laser, a first erbium-doped optical fiber amplifier, a first coupler, a second erbium-doped optical fiber amplifier, a first attenuator, a second coupler, an optical spectrum analyzer, a fiber Brillouin amplifier, a second attenuator and a first single-mode optical fiber. The connections are described below. The tunable laser is connected with the first coupler through the first erbium-doped optical fiber amplifier; the 10 percent terminal of the first coupler is connected with the second erbium-doped optical fiber amplifier, which is then connected with the first single-mode optical fiber through the first attenuator and the second coupler; the 90 percent terminal of the first coupler is connected with the circular laser of the optical fiber Brillouin amplifier; anther terminal of the circular laser of the optical fiber Brillouin amplifier is connected with the second coupler through the second attenuator and the first single-mode optical fiber; the 10 percent terminal of the second coupler is connected with the spectrum analyzer. The invention can shorten the first single-mode optical fiber length and improves the pumped power and gain.
Description
Technical field
What the present invention relates to is the device in a kind of optical communication technology field, specifically is a kind of high-power fiber Brillouin amplifier that is used for full optical buffer.
Background technology
Accelerated growth along with Future Internet data transfer bandwidth demand, present network is owing to be subjected to opto-electronic conversion to be subjected to the restriction of signal of telecommunication processing speed, traffic rate is difficult to further raising, will be difficult to satisfy the demand that data transfer bandwidth increases, and the development all-optical network is imperative.Along with the generation and the extensive use of erbium-doped fiber amplifier (EDFA), the transmission course of signal in optical fiber no longer needs opto-electronic conversion, realized photochemical entirely.And along with the capacity and the communication speed of the ripe backbone network of dense wavelength division multiplexing system (DWDM) technology also constantly promotes.But the bottleneck of development all-optical network is to lack the full optical router that is applied in optical network node at present.The information processing of carrying out at optical node at present, for example Optical Add Drop Multiplexer (OADM), optical cross connect (OXC) all are that the process in exchange is that form with light exists, and control section is to realize by circuit or mechanical form, is not real all-optical network.And the critical component of optical router is exactly an optical buffer.Nearly 2 years optical fiber Brillouin amplifier (FBA) that studies show that can be realized the light caching function.And the low pump power that all is long optical fibers of optical fiber Brillouin amplifier in the past, resulting gain is lower, because caching performance and Amplifier Gain are directly proportional, this can cause the performance of buffer lower.
Find AT﹠amp by prior art documents; The N.A.Olsson of T Bell Laboratory and P.van derZiel publish thesis " Cancellation of fiber loss by semiconductor laser pumpedBrillouin amplification at 1.5 μ m (amplify 1.5 μ m signals with the Brillouin of semiconductor laser pumping and come the compensated fiber loss) ", Appl.Phys.Lett., vol.43, NO.20, MAY 1986 (being published in U.S.'s physical union meeting Applied Physics wall bulletin in May, 1986), the document has reported that amplify by Brillouin can the compensated fiber loss, the principle of promptly utilizing non-linear Brillouin to amplify, provide certain gain to flashlight, be used for offseting it because in the optical fiber loss of transmission generation eventually.But the amplifier of this structure has adopted the long optical fiber of 37.5km, and Brillouin's threshold value has only 6mw, consider fibre loss interior right-flashlight of 17dBm only obtained the gain of 16dB altogether.And because its low threshold value, it is quite serious that spontaneous Brillouin amplifies noise, the low gain strong noise, and this is very disadvantageous in the application of amplifier.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of high-power fiber Brillouin amplifier that is used for full optical buffer is provided, making it shorten fiber lengths improves Brillouin's threshold value greatly, available pump power is corresponding to be increased greatly, and signal is not easy to enter the gain saturation district, can obtain bigger gain and lower noise figure, thereby solve the problem in these high two traditional fiber Brillouin amplifiers of grain low noise, the more important thing is the raising of gain can also corresponding enhancing its delay performance when doing the slower rays buffer.
The present invention is achieved by the following technical solutions, the present invention includes: tunable laser, first erbium-doped fiber amplifier, the one 90:10 coupler, second erbium-doped fiber amplifier, first adjustable attenuator, the 2nd 90:10 coupler, spectroanalysis instrument (OSA), the optical fiber Brillouin ring laser, second adjustable attenuator, first monomode fiber, tunable laser links to each other with the first erbium-doped fiber amplifier input, the first erbium-doped fiber amplifier output links to each other with a 90:10 coupler input then, and be divided into two-way through a 90:10 coupler: the one tunnel is that 10% end of a 90:10 coupler links to each other with the second erbium-doped fiber amplifier input, the second erbium-doped fiber amplifier output links to each other with first adjustable attenuator, one end, the first adjustable attenuator other end links to each other with 90% end of the 2nd 90:10 coupler, and the common port of the 2nd 90:10 coupler links to each other with first monomode fiber, one end; Other one the tunnel is that 90% end of a 90:10 coupler links to each other with optical fiber Brillouin ring laser input, the output of optical fiber Brillouin ring laser links to each other with first monomode fiber, one end through second adjustable attenuator, the first monomode fiber other end links to each other with the input of the 2nd 90:10 coupler, and 10% end of the 2nd 90:10 coupler links to each other with spectroanalysis instrument.
Described optical fiber Brillouin ring laser, comprise: circulator, Polarization Controller, second monomode fiber, first optical isolator, second optical isolator, the 3rd erbium-doped fiber amplifier, the 3rd 90:10 coupler, circulator has three ports, wherein circulator port links to each other with 90% end of a 90:10 coupler, another port of circulator links to each other with Polarization Controller one end, the Polarization Controller other end links to each other with second monomode fiber, the 3rd port of optical circulator links to each other with a port of first optical isolator, another port of first optical isolator links to each other with the 3rd erbium-doped fiber amplifier input, the 3rd erbium-doped fiber amplifier output links to each other with the common port of the 3rd 90:10 coupler, 90% port of the 3rd 90:10 coupler links to each other with a port of second optical isolator, another port of second optical isolator links to each other with second monomode fiber, and 10% end of the 3rd 90:10 coupler links to each other with second adjustable attenuator.
Described first monomode fiber, its length are 100m-5000m, and length is short more, and pump power is high more.
Described first monomode fiber, be G652 monomode fiber, G653 dispersion shifted optical fiber, G655 non-zero dispersion displacement optical fiber, dispersion compensating fiber, dispersion decreasing fiber, highly nonlinear optical fiber, sulfide optical fiber, rare-earth ion-doped optical fiber one of them.
Described second monomode fiber, its length are 12.5m.
When the present invention works, the tunable laser emitting laser is after first erbium-doped fiber amplifier amplifies, be divided into 10% end and 90% end two-way through a 90:10 coupler, wherein 10% one the tunnel is amplified after 90% end of the 2nd 90:10 coupler enters the pump light of first monomode fiber as Brillouin amplifier by second erbium-doped fiber amplifier, the one 90:10 coupler 90% one the tunnel through the port a of circulator to port b, enter second monomode fiber then, in second monomode fiber, produce the back to Brillouin scattering, Brillouin scattering is through Polarization Controller, then via the port b of circulator to port c, then successively by first optical isolator, the 3rd erbium-doped fiber amplifier, the 3 90: 10 couplers, second optical isolator, second monomode fiber, Polarization Controller, constantly circulation vibration in this order, the laser that forms is by the 10% end output of the 3rd 90:10 coupler, entering first monomode fiber through second adjustable attenuator then is exaggerated, signal after the amplification is measured by spectroanalysis instrument at last through the 10% end output of the 2nd 90:10 coupler.
Compared with prior art, the present invention has following beneficial effect: the present invention can shorten the length of first monomode fiber, improves pumped power, has improved gain simultaneously.If the length of first monomode fiber that uses is 600m, with respect to the existing technical scheme of using the 37.5km fiber lengths, can improve available pump power to more than the 60mW, to the Brillouin laser power output be-signal of 30dBm, no matter this flashlight is continuous light or the pulsed light that has information behind ovennodulation or coding, about 20dB of gain and the noise figure that is low to moderate 4dB can be improved, and owing to the cache-time of signal gain and FBA buffer is directly proportional, thereby can improve the about 20ns of buffer memory ability.And,, then can improve gain 36dB as 100m for using the first shorter monomode fiber.Even first single-mode optical fiber length of using is 5000m, also can improve gain 17dB.
Description of drawings
Fig. 1 structural representation of the present invention
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment has provided detailed execution mode and process being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: tunable laser 1, first erbium-doped fiber amplifier 2, the one 90:10 coupler 3, second erbium-doped fiber amplifier 4, first adjustable attenuator 5, the 2nd 90:10 coupler 6, spectroanalysis instrument (OSA) 7, optical fiber Brillouin ring laser 17, second adjustable attenuator 15, first monomode fiber 16, annexation is: tunable laser 1 links to each other with first erbium-doped fiber amplifier, 2 inputs, first erbium-doped fiber amplifier, 2 outputs link to each other with a 90:10 coupler 3 inputs then, and be divided into two-way through a 90:10 coupler 3: the one tunnel is that 10% end of a 90:10 coupler 3 links to each other with second erbium-doped fiber amplifier, 4 inputs, second erbium-doped fiber amplifier, 4 outputs link to each other with first adjustable attenuator, 5 one ends, first adjustable attenuator, 5 other ends link to each other with 90% end of the 2nd 90:10 coupler 6, and the common port of the 2nd 90:10 coupler 6 links to each other with first monomode fiber, 16 1 ends; Other one the tunnel is that 90% end of a 90:10 coupler 2 links to each other with optical fiber Brillouin ring laser 17 inputs, the output of optical fiber Brillouin ring laser 17 links to each other with first monomode fiber, 16 1 ends through second adjustable attenuator 15, first monomode fiber, 16 other ends link to each other with the input of the 2nd 90:10 coupler 6, and 10% end of the 2nd 90:10 coupler 6 links to each other with spectroanalysis instrument 7.
Described optical fiber Brillouin ring laser 17, comprise: circulator 8, Polarization Controller 9, second monomode fiber 10, first optical isolator 12, second optical isolator 11, the 3rd erbium-doped fiber amplifier 13, the 3rd 90:10 coupler 14, circulator 8 has three ports, wherein, a port a of circulator 8 links to each other with 90% end of the one 90: 10 couplers 2, another port b of circulator 8 links to each other with Polarization Controller 9 one ends, Polarization Controller 9 other ends link to each other with second monomode fiber 10, the 3rd port c of optical circulator 8 links to each other with a port d of first optical isolator 12, another port e of first optical isolator 12 links to each other with the 3rd erbium-doped fiber amplifier 13 inputs, the 3rd erbium-doped fiber amplifier 13 outputs link to each other with the common port of the 3rd 90:10 coupler 14,90% port of the 3rd 90:10 coupler 14 links to each other with a port f of second optical isolator 11, another port g of second optical isolator 11 links to each other with second monomode fiber 10, and 10% end of the 3rd 90:10 coupler 14 links to each other with second adjustable attenuator 15.
Described optical fiber Brillouin ring laser 17, its power output are-36～2dBm.
Described first monomode fiber 16, its length is 100m-5000m.
Described first monomode fiber 16, be G652 monomode fiber, G653 dispersion shifted optical fiber, G655 non-zero dispersion displacement optical fiber, dispersion compensating fiber, dispersion decreasing fiber, highly nonlinear optical fiber, sulfide optical fiber, rare-earth ion-doped optical fiber one of them.
Described second monomode fiber 10, its length is 12.5m.
Described spectroanalysis instrument 7 is the EXFO spectroanalysis instrument.
During present embodiment work, after tunable laser 1 emitting laser is first erbium-doped fiber amplifier, 2 amplifications of 160mw through Maximum pumping, be divided into the 90:10 two-way through a 90:10 coupler 3, wherein 10% one the tunnel is that second erbium-doped fiber amplifier 4 of 2w amplifies after 90% end of the 2nd 90:10 coupler 6 enters the pump light of first monomode fiber 16 as the present embodiment device by Maximum pumping, the one 90:10 coupler 3 90% one the tunnel through the port a of circulator 8 to port b, enter second monomode fiber 10 then, in second monomode fiber 10, produce the back to Brillouin scattering, Brillouin scattering is through Polarization Controller 9, then via the port b of circulator 8 to port c, then successively by first optical isolator 12, Maximum pumping is the 3rd erbium-doped fiber amplifier 13 of 140mw, the 3rd 90:10 coupler 14, second optical isolator 11, second monomode fiber 10, Polarization Controller 9, constantly circulation vibration in this order, the laser that forms is entered first monomode fiber 16 through second adjustable attenuator 15 then and is exaggerated by the 10% end output of the 3rd 90:10 coupler 14.Signal after the amplification is measured by spectroanalysis instrument 7 at last through the 10% end output of the 2nd 90:10 coupler 6.
When the length of first monomode fiber 16 is 600m, the signal power of optical fiber Brillouin ring laser 17 output respectively-36dBm ,-25dBm ,-17dBm ,-when 7dBm, 2dBm, increase gradually in the 16mw-120mw scope by the signal pump power of regulating second erbium-doped fiber amplifier 4 or first adjustable attenuator, 5 control tunable laser 1, measure the gain and the noise figure of present embodiment device, the result shows under same pump power, the signal power of optical fiber Brillouin ring laser 17 is more little, and obtainable gain is big more.Signal power at optical fiber Brillouin ring laser 17 is-during 36dBm, when pump power is 115mw, signal obtains the gain up to 49dB, but this moment is because in the gain saturation district, it is bigger that spontaneous Brillouin amplifies noise, so noise figure reaches 11dB, the unsaturation gain that can obtain with this understanding also has 40dB, and this moment, noise figure had only 4dB.Signal power at Brillouin laser is-during 17dBm, obtain the unsaturation gain of 24dB and the saturation gain of 27dB, than documents, gain has nearly 50% raising (having brought up to 24dB by 16dB), improved 8dB, owing to can provide higher gain and low noise figure, so present embodiment is fit to use in the actual optical-fiber network.
When first monomode fiber, 16 length were 100m, with respect to the existing technical scheme of using the 37.5km fiber lengths, maximum can improve gain 36dB.
When first monomode fiber, 16 length were 5000m, with respect to the existing technical scheme of using the 37.5km fiber lengths, maximum can improve gain 17dB.
Claims (6)
1. high-power fiber Brillouin amplifier that is used for full optical buffer, comprise: tunable laser, spectroanalysis instrument, it is characterized in that, also comprise: first erbium-doped fiber amplifier, the one 90: 10 couplers, second erbium-doped fiber amplifier, first adjustable attenuator, the 2 90: 10 couplers, the optical fiber Brillouin ring laser, second adjustable attenuator, first monomode fiber, tunable laser links to each other with the first erbium-doped fiber amplifier input, the first erbium-doped fiber amplifier output links to each other with the one 90: 10 coupler inputs, and be divided into two-way through the one 90: 10 couplers: the one tunnel is that 10% end of the one 90: 10 couplers links to each other with the second erbium-doped fiber amplifier input, the second erbium-doped fiber amplifier output links to each other with first adjustable attenuator, one end, the first adjustable attenuator other end links to each other with 90% end of the 2 90: 10 couplers, and the common port of the 2 90: 10 couplers links to each other with first monomode fiber, one end; Other one the tunnel is that 90% end of the one 90: 10 couplers links to each other with optical fiber Brillouin ring laser input, the output of optical fiber Brillouin ring laser links to each other with first monomode fiber, one end through second adjustable attenuator, the first monomode fiber other end links to each other with the input of the 2 90: 10 couplers, and 10% end of the 2 90: 10 couplers links to each other with spectroanalysis instrument.
2. the high-power fiber Brillouin amplifier that is used for full optical buffer according to claim 1, it is characterized in that, described optical fiber Brillouin ring laser, comprise: circulator, Polarization Controller, second monomode fiber, first optical isolator, second optical isolator, the 3rd erbium-doped fiber amplifier, the 3 90: 10 couplers, circulator has three ports, circulator port and the 1 wherein: 90% end of 10 couplers links to each other, another port of circulator links to each other with Polarization Controller one end, the Polarization Controller other end links to each other with second monomode fiber, the 3rd port of optical circulator links to each other with a port of first optical isolator, another port of first optical isolator links to each other with the 3rd erbium-doped fiber amplifier input, the 3rd erbium-doped fiber amplifier output links to each other with the common port of the 3 90: 10 couplers, 90% port of the 3 90: 10 couplers links to each other with a port of second optical isolator, another port of second optical isolator links to each other with second monomode fiber, and 10% end of the 3 90: 10 couplers links to each other with second adjustable attenuator.
3. the high-power fiber Brillouin amplifier that is used for full optical buffer according to claim 1 is characterized in that, described optical fiber Brillouin ring laser, and its power output is-36～2dBm.
4. the high-power fiber Brillouin amplifier that is used for full optical buffer according to claim 1 is characterized in that, described first monomode fiber, and its length is 100m-5000m.
5. according to claim 1 or the 4 described high-power fiber Brillouin amplifiers that are used for full optical buffer, it is characterized in that, described first monomode fiber, be G652 monomode fiber, G653 dispersion shifted optical fiber, G655 non-zero dispersion displacement optical fiber, dispersion compensating fiber, dispersion decreasing fiber, highly nonlinear optical fiber, sulfide optical fiber, rare-earth ion-doped optical fiber one of them.
6. the high-power fiber Brillouin amplifier that is used for full optical buffer according to claim 1 is characterized in that, described second monomode fiber, and its length is 12.5m.
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| CN101145852B CN101145852B (en) | 2010-05-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840031A (en) * | 2010-04-27 | 2010-09-22 | 北京交通大学 | Light-operated dynamic all-optical buffer shaper based on composite grating nonreciprocal coupling |
| CN102916329A (en) * | 2012-11-09 | 2013-02-06 | 天津理工大学 | Fourier domain mode locking optical fiber laser device |
| CN103940501A (en) * | 2014-04-11 | 2014-07-23 | 电子科技大学 | BOTDA distributed vibration sensing system based on dynamic phase demodulating |
| CN104155721A (en) * | 2014-09-02 | 2014-11-19 | 中国科学院半导体研究所 | Optical sampling system based on quantum dot mode-locked laser devices |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20020301A1 (en) * | 2002-02-15 | 2003-08-18 | Marconi Comm Spa | OPTICAL FIBER COMMUNICATION SYSTEM WITH BRILLOUIN EFFECT AMPLIFICATION |
| CN1777069A (en) * | 2005-12-15 | 2006-05-24 | 上海交通大学 | Fully optical-fiber erbium-doped Brillouin amplifier |
| CN100470347C (en) * | 2007-02-12 | 2009-03-18 | 清华大学 | Narrow pulse fiber amplifier |
-
2007
- 2007-11-01 CN CN200710047679A patent/CN101145852B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840031A (en) * | 2010-04-27 | 2010-09-22 | 北京交通大学 | Light-operated dynamic all-optical buffer shaper based on composite grating nonreciprocal coupling |
| CN101840031B (en) * | 2010-04-27 | 2011-07-20 | 北京交通大学 | Light-operated dynamic all-optical buffer shaper based on composite grating nonreciprocal coupling |
| CN102916329A (en) * | 2012-11-09 | 2013-02-06 | 天津理工大学 | Fourier domain mode locking optical fiber laser device |
| CN103940501A (en) * | 2014-04-11 | 2014-07-23 | 电子科技大学 | BOTDA distributed vibration sensing system based on dynamic phase demodulating |
| CN104155721A (en) * | 2014-09-02 | 2014-11-19 | 中国科学院半导体研究所 | Optical sampling system based on quantum dot mode-locked laser devices |
| CN104155721B (en) * | 2014-09-02 | 2016-09-14 | 中国科学院半导体研究所 | Optical Sampling system based on quantum dot mode-locked laser |
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