CN1707877A - Continuous running high-power multi-wavelength optical fiber light source based on ultra continuous spectrum - Google Patents
Continuous running high-power multi-wavelength optical fiber light source based on ultra continuous spectrum Download PDFInfo
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- CN1707877A CN1707877A CN 200510013534 CN200510013534A CN1707877A CN 1707877 A CN1707877 A CN 1707877A CN 200510013534 CN200510013534 CN 200510013534 CN 200510013534 A CN200510013534 A CN 200510013534A CN 1707877 A CN1707877 A CN 1707877A
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Abstract
The present invention relates to fiber light source, and is especially one kind of fiber light source based on super continuous spectrum technology to realize high power continuous multi-wavelength output. The technology of the present invention includes adopting the output of great power continuous wave Raman fiber laser with central wavelength of 1.24 micron as the pumping light; introducing the pumping light into super continuous spectrum cavity of nesting structure comprising common monomode fiber and fiber grating; converting the energy of the pumping light into next stage Stokes light in 1.31 micron band under the action of Raman scattering, modulating unstability and other non-linear fiber effects; expanding into very wide continuous spectrum; and spectrum segmentation after filtering to obtain multi-wavelength output in 1.31 micron band. The present invention has the advantages of high output power, high time and temperature stability, etc.
Description
Technical field
The present invention relates to a kind of optical fiber source, particularly realize the optical fiber source of the high power multi-wavelength output of running continuously based on the super continuous spectrums technology.
Background technology
The method that is used to now to produce multi wave length illuminating source both at home and abroad generally has following several: (1) is by approaching a plurality of distributed feed-back (the Distributed Feedback of wavelength, DFB) multi wave length illuminating source [the Sudoh T.K. of laser array formation, Nakano Y., et al., " Wavelength trimming technology for multiple wavelength distributed feedback laser arrays byphoto induced refractive index change ", Electron.Lett., 1997,33 (3): 216-217]; (2) method that adopts the selectivity feedback or add filter is carried out spectrum to the output of erbium doped fiber laser and is cut apart [Wysocki P.F.et al., " Characteristics of erbium-doped superfluorescent fiber sources for interferometric sensorapplications ", J.Lightwave Technol, 1994,12 (3): 550-567]; (3) super continuous spectrums that produces of paired pulses pumping carries out spectrum and cuts apart [Morioka, T., " Supercontinuum lightwave source for next generation opticalnetworks ", LEOS 2002,10-14 Nov.2002, vol.1:117-118].Wherein method (1) is accurately controlled quite difficulty of output spectrum and lambda router channel spacing coupling because the Distributed Feedback Laser output wavelength changes with the waveguide effective refractive index, uses a plurality of Distributed Feedback Lasers to make cost too high simultaneously, complex process.Method (2) is though avoided using simultaneously the coupling of a plurality of lasers, and only there is the gain spectral of broad in erbium doped fiber laser at the 1550nm wave band, and temperature influence is very big, and normal temperature can't provide the output spectra of broad to carry out spectrum down to cut apart.Method (3) is though can remedy the deficiency of above-mentioned two methods, and the pumping source that adopts is a pulse laser, and multi-wavelength is exported with pulse mode work, and is difficult to obtain higher-wattage output.Therefore, all there is defective in this several method, is very limited in actual applications.
Summary of the invention
Purpose of the present invention: with lower cost, simple structure realizes that at 1.31 mu m wavebands full fiber type, power output are greater than the multi-wavelength output of turning round continuously of the high power of 1w.
Technology constitutes: the output light of high power CW ripple Raman optical fiber laser that with centre wavelength is 1.24 μ m is as pump light, enter the super continuous spectrums chamber of the nested structure that constitutes by general single mode fiber and fiber grating, under the effect of fiber nonlinear effects such as Raman scattering, modulational instability and four wave mixing, the Conversion of energy of pump light is the next stage stokes light that is positioned at 1.31 mu m wavebands, and be that center spread becomes wide ultra broadband continuous spectrum with it, continuous spectrum is cut apart by spectrum through behind the filter, thereby obtains a plurality of wavelength outputs of 1.31 mu m wavebands.
Concrete technical scheme of the present invention is:
Continuous running high-power multi-wavelength optical fiber light source based on super continuous spectrums, it comprises Raman optical fiber laser, super continuous spectrums chamber, filter, its characteristics are: Raman optical fiber laser comprise phosphorus silicon raman optical fibre, fiber grating and, and pumping source, in the forward and backward two ends difference welding total reflection grating of phosphorus silicon raman optical fibre and the Raman chamber of partial reflection optical grating constitution single-stage, adopt pumping source that it is carried out pumping, constitute single wavelength output Raman optical fiber laser; Nesting type structure is adopted in super continuous chamber, it comprise general single mode fiber, fiber grating and, and aforementioned Raman chamber; General single mode fiber directly is welded on the output of Raman optical fiber laser, and the feedback system in total reflection grating and the super continuous chamber of partial reflection optical grating constitution and monomode fiber be jointly as super continuous gain media, the purpose of growth gain fibre length; The reponse system of utilizing fiber grating to constitute, Raman chamber are nested in the super continuous chamber and place; Comb filter is positioned at the output in super continuous spectrums chamber, and the spectrum of broadening is cut apart, and output is a plurality of wavelength of running continuously.
Beneficial effect of the present invention: novel multi wave length illuminating source has can export that a plurality of wavelength, power output height, time stability are good, at room temperature good, the fiberize degree height of operate as normal, temperature stability is convenient to integratedly at 1.31 mu m wavebands, and cost is low, technology simple, be easy to suitability for industrialized production.The outstanding characteristics of this multi wave length illuminating source are exactly to realize the multi-wavelength output of higher-wattage and running continuously at 1.31 mu m wavebands; Experimental provision has adopted unique nesting type structure, has fully utilized Raman gain optical fiber and the general single mode fiber gain media as wideband spectrum, effectively raises the length of gain media, thereby has further improved transformation efficiency; Experimental provision is simple, and used optical fiber is common single mode optical fibres, does not need special optical fiber; Total adopts fiber grating as reponse system, has realized full fiberize, helps integrated and in the coupling of optical fiber telecommunications system, greatly reduces coupling loss.Utilize this technology, can near dispersion zero-point (1.31 μ m communication window), realize the output of a plurality of wavelength, effectively avoid the influence of chromatic dispersion, need not use expensive special optical fibers such as dispersion compensation, satisfy optical communication system at these communication window requirements of one's work to multi-wavelength output.So, but this is a kind ofly to turn round, export average power height normal temperature operate as normal, low, the simple multi wave length illuminating source of technology of cost in a continuous manner at 1.31 mu m wavebands.
Description of drawings
Fig. 1 structural representation of the present invention
Fig. 2 four-wave mixing in fiber effect causes spectrum widening effect schematic diagram
Among the figure: 1. laser 2. total reflection optical fiber gratings 3. total reflection gratings 4. phosphorus silicon raman optical fibres 5. partial reflection gratings 6. monomode fibers 7. partial reflection gratings, 8. comb filter, 9. Raman chamber
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated:
Continuous running high-power multi-wavelength optical fiber light source based on super continuous spectrums, it comprises Raman optical fiber laser, super continuous spectrums chamber, filter, its characteristics are: Raman optical fiber laser comprises phosphorus silicon raman optical fibre 4, fiber grating 3 and 5, and pumping source 1, in the forward and backward two ends difference welding total reflection grating 3 of phosphorus silicon raman optical fibre and the Raman chamber 9 of partial reflection grating 5 formation single-stages, adopt pumping source 1 that it is carried out pumping, constitute single wavelength output Raman optical fiber laser; Nesting type structure is adopted in super continuous chamber, and it comprises general single mode fiber 6, fiber grating 2 and 7, and aforementioned Raman chamber 9; General single mode fiber 6 directly is welded on the output of Raman optical fiber laser, total reflection grating 2 and partial reflection grating 7 constitute the reponse system in super continuous chamber, wherein grating 2 is positioned at the input in Raman chamber, 7 tail ends that are placed in monomode fiber 6 of grating, thereby reach phosphorus silicon optical fiber 4 and monomode fiber 6 jointly as super continuous gain media, increase the purpose of gain fibre length; The reponse system of utilizing fiber grating to constitute, Raman chamber 9 are nested in the super continuous chamber and place; Comb filter 8 is positioned at the output in super continuous spectrums chamber, and the spectrum of broadening is cut apart, and output is a plurality of wavelength of running continuously.
The centre wavelength of total reflection optical fiber grating 2 is 1315nm.
The centre wavelength of total reflection grating 3 and partial reflection grating 5 is 1245nm.
The centre wavelength of partial reflection grating 7 is 1315nm.
Pumping source is that output wavelength is ytterbium-doped double-cladded-layer optical fiber laser or other laser of 1070nm.
The centre wavelength of general single mode fiber 6 is 1315nm, and gain media is that the zero dispersion point is the general single mode fiber of 1310nm.
This most outstanding advantage of multi-wavelength output that constitutes based on super continuous spectrums being carried out spectrum cut apart just has been to utilize the zero dispersion characteristics of monomode fiber at 1.31 mu m wavebands, the transformation efficiency of the various nonlinear effects in the optical fiber is improved greatly, thereby utilize lower cost, simple structure can obtain the ultra broadband spectrum of running continuously, and then obtain the continuous output of a plurality of wavelength.
The Physical Mechanism of this multi wave length illuminating source can be explained by the nonlinear effect in the optical fiber.At first, output wavelength is after laser that the pump light source 1 of 1070nm is sent enters phosphorus silicon optical fiber 4, utilizes that frequency shift amount is 1330cm in 4
-1The Raman scattering effect, and since the feedback effect of total reflection grating 3 and partial reflection grating 5 form high power laser light at 1245nm place and export.Then, the laser of 1245nm is in phosphorus silicon optical fiber 4 and monomode fiber 6, and being subjected to wherein, frequency shift amount is 440cm
-1The effect of Raman scattering effect, be converted into the stokes light that wavelength is 1315nm, and under 2 and 7 feedback effect, obtain higher-wattage.
After this, wavelength be the light of 1315mn in phosphorus silicon optical fiber 4 and monomode fiber 6 because fiber nonlinear effect is seted out living broadening.The nonlinear effect of Chan Shenging is a modulational instability at first, according to the non-linear Schrdinger equation in the optical fiber, when the light wave in the optical fiber is positioned at the anomalous dispersion district of optical fiber, can produce new spectral component in its both sides, gain maximum and former transmission light frequency difference are Ω
s=[2 γ P
pExp (α L)/| β
2|]
1/2For non linear coefficient γ is 0.47W
-1Km
-1, loss α is 0.36dB/km, abbe number β
2For-0.303pa
2The monomode fiber of/km, power are that 2W, wavelength are that the light wave of 1315nm will produce maximum gain at 1307.4nm and 1322.6nm place, promptly produce broadening in about 15nm scope.
Power four-wave mixing effect then occurs after increasing.To the four-wave mixing effect of degeneracy, frequency is ω
pLight wave in optical fiber, can produce and satisfy frequency match (2 ω simultaneously
p=ω
s+ ω
As) and phase matched (κ=(k
s+ k
As-2k
p)+2 γ P
p=0) two frequencies are ω
sAnd ω
AsNew light wave, and make spectrum widening.Because monomode fiber is in the zero dispersion characteristics of 1.31 mu m wavebands, phase-matching condition is easy to satisfy in very big wave-length coverage, and the efficient of spectrum widening is improved greatly.In aforementioned monomode fiber because the power that modulational instability produces is that 2W, centre wavelength are that 1315nm, width are the light wave of 15nm, can be in the scope from 1200nm to 1450nm new light wave, but promptly the spectrum broadening to (Fig. 2) more than the 100nm.Thus, light wave obtains broadening on a large scale.
At last, the light wave behind the broadening evenly is divided into many parts by comb filter 8 on spectrum, forms multi-wavelength output.
Claims (6)
1. continuous running high-power multi-wavelength optical fiber light source based on super continuous spectrums, it comprises Raman optical fiber laser, super continuous spectrums chamber, filter, it is characterized in that: Raman optical fiber laser comprises phosphorus silicon raman optical fibre (4), fiber grating (3) and (5), and pumping source (1), in the forward and backward two ends difference welding total reflection grating (3) of phosphorus silicon raman optical fibre and the Raman chamber (9) of partial reflection grating (5) formation single-stage, adopt pumping source (1) that it is carried out pumping, constitute single wavelength output Raman optical fiber laser; Nesting type structure is adopted in super continuous chamber, and it comprises general single mode fiber (6), fiber grating (2) and (7), and aforementioned Raman chamber (9); General single mode fiber (6) directly is welded on the output of Raman optical fiber laser, total reflection grating (2) and partial reflection grating (7) constitute the reponse system in super continuous chamber, wherein grating (2) is positioned at the input in Raman chamber, grating (7) then is placed in the tail end of monomode fiber (6), thereby reach phosphorus silicon optical fiber (4) and monomode fiber (6) jointly as super continuous gain media, increase the purpose of gain fibre length; The reponse system of utilizing fiber grating to constitute, Raman chamber (9) are nested in the super continuous chamber and place; Comb filter (8) is positioned at the output in super continuous spectrums chamber, and the spectrum of broadening is cut apart, and output is a plurality of wavelength of running continuously.
2. according to the said continuous running high-power multi-wavelength optical fiber light source based on super continuous spectrums of claim 1, it is characterized in that: the centre wavelength of total reflection optical fiber grating (2) is 1315nm.
3. according to the said continuous running high-power multi-wavelength optical fiber light source based on super continuous spectrums of claim 1, it is characterized in that: the centre wavelength of total reflection grating (3) and partial reflection grating (5) is 1245nm.
4. according to the said continuous running high-power multi-wavelength optical fiber light source based on super continuous spectrums of claim 1, it is characterized in that: the centre wavelength of partial reflection grating (7) is 1315nm.
5. according to the said continuous running high-power multi-wavelength optical fiber light source based on super continuous spectrums of claim 1, it is characterized in that: pumping source is that output wavelength is ytterbium-doped double-cladded-layer optical fiber laser or other laser of 1070nm.
6. according to the said continuous running high-power multi-wavelength optical fiber light source based on super continuous spectrums of claim 1, it is characterized in that: gain media is that the zero dispersion point is the general single mode fiber of 1310nm.
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| CN102130413A (en) * | 2011-02-17 | 2011-07-20 | 浙江大学 | Full optical fiber type supercontinuum laser source based on multi-component-doped silica optical fiber |
| CN102338965A (en) * | 2011-08-24 | 2012-02-01 | 武汉邮电科学研究院 | Method for producing ultra-wide spectrum optical comb |
| CN102480102A (en) * | 2010-11-22 | 2012-05-30 | 住友电气工业株式会社 | MOPA (master oscillator power amplifier) light source |
| CN106571580A (en) * | 2016-10-19 | 2017-04-19 | 电子科技大学 | Mid-infrared fiber laser with tunable wavelength and broadband |
| CN108512020A (en) * | 2017-09-22 | 2018-09-07 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
| CN109075523A (en) * | 2016-01-22 | 2018-12-21 | 国立科学研究中心 | Equipment for generating the polychrome photon beam with substantially constant energy |
| CN111463648A (en) * | 2019-01-21 | 2020-07-28 | 长春理工大学 | Low-jitter high-repetition-frequency supercontinuum light source |
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| CN102801090B (en) * | 2012-08-13 | 2014-11-19 | 温州泛波激光有限公司 | Long-pulse fiber laser |
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| US5323404A (en) * | 1993-11-02 | 1994-06-21 | At&T Bell Laboratories | Optical fiber laser or amplifier including high reflectivity gratings |
| FR2858421B1 (en) * | 2003-07-29 | 2005-11-11 | Cit Alcatel | ACTIVE OPTICAL FIBER FOR RAMAN AMPLIFICATION |
| CN1271757C (en) * | 2003-10-30 | 2006-08-23 | 上海交通大学 | Multiple wavelength ultra continuous light sources |
| CN1617037A (en) * | 2004-12-03 | 2005-05-18 | 清华大学 | Broadband envelope flat full optical fiber multiple wavelength Raman laser |
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| CN102480102A (en) * | 2010-11-22 | 2012-05-30 | 住友电气工业株式会社 | MOPA (master oscillator power amplifier) light source |
| CN102130413A (en) * | 2011-02-17 | 2011-07-20 | 浙江大学 | Full optical fiber type supercontinuum laser source based on multi-component-doped silica optical fiber |
| CN102338965A (en) * | 2011-08-24 | 2012-02-01 | 武汉邮电科学研究院 | Method for producing ultra-wide spectrum optical comb |
| CN102338965B (en) * | 2011-08-24 | 2013-06-19 | 武汉邮电科学研究院 | Method for producing ultra-wide spectrum optical comb |
| US8724204B2 (en) | 2011-08-24 | 2014-05-13 | Wuhan Research Institute Of Posts And Telecommunications | System and method for generating an optical comb |
| CN109075523A (en) * | 2016-01-22 | 2018-12-21 | 国立科学研究中心 | Equipment for generating the polychrome photon beam with substantially constant energy |
| CN106571580A (en) * | 2016-10-19 | 2017-04-19 | 电子科技大学 | Mid-infrared fiber laser with tunable wavelength and broadband |
| CN106571580B (en) * | 2016-10-19 | 2019-03-01 | 电子科技大学 | A kind of mid-infrared fiber laser of wavelength wideband adjustable |
| CN108512020A (en) * | 2017-09-22 | 2018-09-07 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
| CN108512020B (en) * | 2017-09-22 | 2019-06-25 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
| CN111463648A (en) * | 2019-01-21 | 2020-07-28 | 长春理工大学 | Low-jitter high-repetition-frequency supercontinuum light source |
| CN111463648B (en) * | 2019-01-21 | 2021-05-25 | 长春理工大学 | Low-jitter high-repetition-frequency supercontinuum light source |
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