CN102801091A - Random fiber laser - Google Patents
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- CN102801091A CN102801091A CN2012103287663A CN201210328766A CN102801091A CN 102801091 A CN102801091 A CN 102801091A CN 2012103287663 A CN2012103287663 A CN 2012103287663A CN 201210328766 A CN201210328766 A CN 201210328766A CN 102801091 A CN102801091 A CN 102801091A
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Abstract
The invention discloses a random fiber laser system. According to the system, an optical fiber serves as a laser medium, and a fiber laser comprising a crystal fiber laser, a nonlinear fiber laser, a rare earth doped fiber laser and a plastic fiber laser serves as pump light to be coupled into the optical fiber. Because the refractive index of the optical fiber has non-uniformity and is randomly distributed along the optical fiber, so that the photon is subjected to rayleigh scattering during transmission in the optical fiber; and moreover, the pump light provides gain for the backward scattered light along the optical fiber, when the overall gain is greater than the total loss, the backward scattered light is amplified to form random laser. A discrete optical component is not arranged in the light path of the system, so that all-fiber connection is realized. In the system, the residual pump light is returned to the optical fiber, and the distributed weak scattered light is amplified, and therefore, according to the random fiber laser system, the threshold power of the pump light can be reduced, the utilization rate of the pump light can be improved, and the slope efficiency of the laser is improved.
Description
Technical field
The present invention relates to a kind of fiber ring laser system at random.This system as pumping source, as laser medium, utilizes the Rayleigh back scattering light amplification in the optical fiber to form laser with optical fiber with fiber laser, belongs to new pattern laser device field.
Background technology
Sergei K. Turitsyn in document, Sergey A. Babin, Atalla E. El-Taher; Paul Harper, Dmitriy V. Churkin, Sergey I. Kablukov; Juan Diego Ania-Castanon; VassilisKaralekas and Evgenii V. Podivilov. Random distributed feedback fibre laser. Nature Photon.2010 introduces a kind of fiber ring laser system at random among 4,231 – 235.In this system, the pump light of the 1455nm of two bundle equal power is from the midpoint of optical fiber coupled into optical fibres (total length of optical fiber is 83km) in opposite direction.The photon that in optical fiber, transmits is because the inhomogeneous generation coherent scattering of refractive index of optical fiber has formed distributed Rayleigh scattering (RS), and most scattered photon lets out from fiber cores.The backscattered photons of having only minority is along Optical Fiber Transmission.Pump light provides distributed Raman gain along optical fiber.If the overall gain of backscattered photons is during greater than total losses, rear orientation light will be exaggerated and form laser and penetrate from the two ends of optical fiber, and the wavelength of shoot laser is 1550nm.This is the incoherent laser in a kind of space, in a lot of fields important use is arranged.
This Technology Need is improved to be:
1. threshold value problem.Need the threshold power of laser higher in the said system, reach 1.6W, high like this threshold value, too high to the power requirement of pump light, realize difficulty, so the reduction threshold value of must trying every possible means.
2. output power of laser awaits further to improve.Although power output has reached 150mw, in plurality of applications, still can't satisfy higher power demand.
3. the utilance of pump light is lower.Total slope efficiency is 30% in the said system, should improve the slope efficiency of laser as much as possible.
Summary of the invention
The object of the invention is exactly in order to improve the performance index of fiber laser at random, and can make fiber laser instrumentation at random.Proposed the use fiber laser as pump light source, residual pump light has been returned the scheme that optical fiber amplifies distributed Rayleigh scattering light once more.Can reduce laser threshold so on the one hand, can also improve the power output and the slope efficiency of laser on the other hand, and help manufacturing the instrument of practicability.
Basic thought of the present invention is following:
What the laser medium of accidental laser used is optical fiber, can be optical fiber of monomode fiber, photonic crystal fiber, plastic fiber, doped fiber and other kinds or the like.The inclined-plane is cut at the two ends of optical fiber in the experiment, gets into fiber core to stop the Fresnel reflection that is caused by fiber end face.Pump light is provided by fiber laser, can be photon crystal optical laser device, nonlinear optical fibre laser (Raman fiber lasers and Brillouin optical fiber laser etc.), Rear Earth Doped Fiber Laser and plastic fiber laser etc.Because the refractive index of optical fiber is inhomogeneous, and light when in optical fiber, propagating Rayleigh scattering can take place, the back is very little to rayleigh scattering coefficient, is approximately δ=4.5 * 10 in laser medium
-5Km
-1, therefore in optical fiber, the back is negligible to rayleigh scattered radiation generally speaking.But if the optical fiber long enough, and rear orientation light will form laser after being exaggerated.For example: if the pump light wavelength is 1455nm; Distributed back is after Rayleigh scattering light amplifies through Raman; About 1550nm, have maximum gain, be approximately 13THz with respect to the stokes frequency displacement of pump light, so the wavelength of the Random Laser of outgoing is approximately about 1550nm; If the pump light wavelength is 1455nm; Distributed back is after Rayleigh scattering light amplifies through Brillouin; About 1455.1nm, having maximum gain, is approximately to be 10GHz with respect to the stokes frequency displacement of pump light, so the wavelength of the Random Laser of outgoing is approximately about 1455.1nm.
Native system uses fiber laser as pump light source, and the chamber of fiber laser can be a linear cavity, also can be annular chamber.Fiber laser is divided into four kinds by gain media: photon crystal optical laser device, nonlinear optical fibre laser (Raman fiber lasers and Brillouin optical fiber laser etc.), Rear Earth Doped Fiber Laser and plastic fiber laser.Fiber laser is because advantage such as beam quality, high power, high efficiency and the volume of its high-quality be little is the more satisfactory pump light source of Random Laser.
1. fiber laser at random is characterized in that, is one of following two kinds of schemes:
Scheme one comprises first semiconductor laser 1, second semiconductor laser 2, first coupler 3, second coupler 4, the 3rd coupler 5, the 4th coupler 6, first optical fiber 7, second optical fiber 8, first fiber grating 9, second fiber grating 10, first optical isolator 11, second optical isolator 12, the 3rd optical isolator 13, pump light speculum 14;
Wherein:
The shoot laser conduct of fiber laser is the pump light of fiber laser at random, is coupled into second optical fiber 8 through first optical isolator 11 and the 3rd coupler 5; Second optical fiber 8 is laser mediums of fiber laser at random; Second optical fiber, 8 one ends connect the pump light speculum 14 and second optical isolator 12 respectively through the 4th coupler 6, and the other end connects the 3rd optical isolator 13 through the 3rd coupler 5; In second optical fiber 8, produce back to rayleigh scattered radiation through twice even repeatedly amplify the back and form Random Laser, through the 3rd coupler 5 and 13 outputs of the 3rd optical isolator;
Scheme two comprises first semiconductor laser 1, first coupler 3, second coupler 4, the 3rd coupler 5, the 4th coupler 6, first optical fiber 7, second optical fiber 8, first optical isolator 11, second optical isolator 12, the 3rd optical isolator 13, the 4th optical isolator 15, pump light speculum 14, fiber grating 16;
Wherein:
Fiber laser output light is exported the also conduct pump light of fiber laser at random through second coupler 4; Second coupler 4 connects second optical isolator 12; Second optical isolator 12 connects second optical fiber 8 through the 3rd coupler 5; Second optical fiber 8 is laser mediums of fiber laser at random; Second optical fiber, 8 one ends connect pump light speculum 14 respectively through the 4th coupler 6 and the 3rd optical isolator 13, the second optical fiber 8 other ends connect the 4th optical isolator 15 through the 3rd coupler 5; In second optical fiber 8, produce back to rayleigh scattered radiation through twice even repeatedly amplify the back and form Random Laser, through the 3rd coupler 5 and 15 outputs of the 4th optical isolator.
First kind of scheme is based on the fiber ring laser system at random of the fiber laser of linear cavity.
In this scheme, the pumping source of fiber laser is the fiber laser of linear cavity at random.The fiber laser of linear cavity is made up of pumping source, working-laser material (gain media) and laserresonator three parts.Fiber laser is divided into following several kinds by gain media: photon crystal optical laser device, nonlinear optical fibre laser (Raman fiber lasers and Brillouin optical fiber laser etc.), Rear Earth Doped Fiber Laser, plastic fiber laser or the like.
Example one: fiber laser can use rare-earth doped optical fibre as working-laser material, as laser resonant cavity, uses semiconductor laser as pumping source with fiber grating.If rare-earth doped optical fibre is a ytterbium, ytterbium ion has the absorption band (800-1064nm) and the excitation band (970-1200nm) of broad, and the selection of pumping source is more extensive.At 976nm and 915nm very strong absworption peak is arranged according to the ytterbium ion absorption spectrum, so pumping source can use the semiconductor laser of 976nm, the fiber grating at two ends provides feedback for forming laser, forms resonant cavity, and possesses the frequency-selecting effect.If the fiber grating of an end is high anti-to 1060nm light, the other end is to the partial reflection of 1060nm light, and exportable wavelength is the laser of 1060nm after reaching threshold value.The 1060nm laser of ytterbium-doping optical fiber laser output forms Random Laser as the pump light coupled into optical fibres of Random Laser if the Rayleigh rear orientation light amplifies through Raman.Random Laser produces the 13THz frequency displacement with respect to pump light.
Example two: fiber laser is the nonlinear optical fibre laser.The nonlinear optical fibre laser mainly is non-linear stimulated Raman scattering and the stimulated Brillouin scattering effect of utilizing in the optical fiber.Use highly nonlinear optical fiber as gain media, resonant cavity can be grating pair or annular chamber, and its output wavelength depends on the Raman frequency shift and the Brillouin shift of pumping source wavelength and gain media respectively.If Raman fiber lasers, the laser frequency of output then is the result of the laser frequency of pumping source through Raman frequency shift so.If Brillouin laser, the Random Laser frequency of output is the result of pumping source laser frequency through a Brillouin shift so.The back forms the Random Laser of output if Rayleigh scattering is amplified through Raman at last, and the frequency of Random Laser is that the frequency of nonlinear optical fibre laser is through the result behind the Raman frequency shift.
Example three: fiber laser is the photon crystal optical laser device.LD pump photon crystal fiber such as 915nm obtains the output of 980nm continuous laser.This moment, the laser of 980nm amplified through Raman as the pump light coupled into optical fibres of Random Laser, and the frequency displacement that promptly produces 13THz forms Random Laser.Directly compare as pumping source with the semiconductor laser of 980nm, the better quality of photon crystal optical laser device output laser is more stable.
Second kind of scheme is based on the fiber ring laser system at random of circular cavity optic fibre laser.Circular cavity optic fibre laser has low threshold value, does not have advantages such as hole burning effect.Pumping light is through in the wavelength division multiplexer coupled into optical fibres in annular cavity laser, pass through the energy distribution of coupler again after, a lasing part is directly exported, another part is reflected back by fiber grating.Fiber grating plays a part energy back and frequency-selecting as the chamber mirror.The laser that reflects back gets into optical fiber through coupler more again, constitutes closed circuit, forms circular cavity optic fibre laser.Working-laser material in the circular cavity optic fibre laser can be each type optical fiber.The laser of circular cavity optic fibre laser output is as the pump light coupled into optical fibres of Random Laser, if amplify through Raman, the frequency displacement that promptly produces 13THz forms Random Laser.
Example one: the laser frequency of Brillouin's annular optical fiber laser output is the laser result that the process Brillouin shift obtains in annular chamber that pump laser sends.Brillouin's annular optical fiber laser is the high-coherence light source of utmost point narrow linewidth.Brillouin optical fiber laser all adopts annular chamber mostly.The gain media of Brillouin optical fiber laser can be optical fiber of monomode fiber, highly nonlinear optical fiber, photonic crystal fiber, plastic fiber, doped fiber and other kinds or the like.If pump light is coupled in the optic fiber ring-shaped cavity through coupler, stimulated Brillouin scattering can take place in the fiber gain medium of annular chamber, amplify the back through the feedback of annular chamber and form laser output.This laser is as the pump light coupled into optical fibres of fiber laser at random, if after Rayleigh scattering was amplified through Raman, the frequency displacement that promptly produces 13THz formed Random Laser then.
Example two: rear-earth-doped circular cavity optic fibre laser, like the annular chamber erbium doped fiber laser, the pumping light of 980nm is coupled in the Er-doped fiber through a 980/1550nm wavelength division multiplexer.Fiber grating is 1555.10nm, and reflectivity is 99.9%.Last excitation wavelength is 1555.10nm, and this laser is as the pump light coupled into optical fibres of fiber laser at random, if after Rayleigh scattering was amplified through Raman, the frequency displacement that promptly produces 13THz formed Random Laser then.
And in order effectively to utilize pump light, the present invention has also adopted round trip to amplify scheme, also with residual pump light with pump light mirror reflects back into optical fibers, so pump light all forms amplification to the Rayleigh rear orientation light in the communication process of former and later two directions.Twice of pump light and even repeatedly pass through gain fibre makes the Rayleigh rear orientation light through repeatedly amplifying, and improved the slope efficiency of magnification ratio and laser.This fiber ring laser system at random based on fiber laser not only can reduce the threshold value that laser produces, and can also effectively utilize pump light simultaneously, improves the slope efficiency of laser.
Technical scheme of the present invention is following:
Scheme one comprises first semiconductor laser 1, second semiconductor laser 2, first coupler 3, second coupler 4, the 3rd coupler 5, the 4th coupler 6, first optical fiber 7, second optical fiber 8, first fiber grating 9, second fiber grating 10, first optical isolator 11, second optical isolator 12, the 3rd optical isolator 13, pump light speculum 14.Wherein:
Scheme two comprises first semiconductor laser 1, first coupler 3, second coupler 4, the 3rd coupler 5, the 4th coupler 6, first optical fiber 7, second optical fiber 8, first optical isolator 11, second optical isolator 12, the 3rd optical isolator 13, the 4th optical isolator 15, pump light speculum 14, fiber grating 16.Wherein:
The laser that first semiconductor laser 1 sends is coupled into the optical fiber that first optical fiber, 7, the first optical fiber 7 can be photonic crystal fiber, highly nonlinear optical fiber, plastic fiber, rare-earth doped optical fibre or other kind through first coupler 3.First optical isolator 11 can make the light one-way transmission.After the energy distribution through second coupler 4, a part of laser is via in the fiber grating 16 reflected back annular chambers, and another part is as the laser output of fiber laser.The conduct of output light is the pump light of fiber laser at random, is coupled in second optical fiber 8 via second optical isolator 12 and the 3rd coupler 5.Second optical fiber 8 can be the optical fiber of photonic crystal fiber, highly nonlinear optical fiber, plastic fiber, rare-earth doped optical fibre or other kind.The Rayleigh scattering light that in second optical fiber 8, produces will be if through producing Random Laser after the Raman amplification.The frequency of Random Laser will be the result of fiber laser output laser frequency frequency displacement 13THz.In order to improve the laser utilance; After residual pump light is reflected by pump light speculum 14; Be coupled in second long optical fibers 8 through the 4th coupler 6; The back scattering rayleigh radiation through twice in addition repeatedly amplify after, through the 3rd coupler 5 and 15 outputs of the 4th optical isolator, thereby obtain Random Laser.The 3rd optical isolator 13 is to get in the optical fiber for the reverberation that stops fiber end face to cause.Wherein first coupler 3, second coupler 4, the 3rd coupler 5, the 4th coupler 6 can be wavelength division multiplexer, circulator or other optical passive components of satisfying the demand.
Beneficial effect of the present invention mainly contains:
One, this at random fiber ring laser system use the pump light source of the high fiber laser of good beam quality, good stability, efficient as Random Laser, make that whole fiber ring laser system at random has that volume is little, good stability, be easy to advantages such as integrated.
Two, native system can be that one way also can be that scheme is amplified in the round trip pumping; Residual pump light comes back to optical fiber after by the pump light mirror reflects; Twice of pump light and even repeatedly pass through gain fibre makes the Rayleigh rear orientation light through repeatedly amplifying, so native system can make the threshold value control of laser below 1.6W; The power output of laser is more than 150mW, and the slope efficiency of laser reaches 15%.
Description of drawings
Fig. 1 is scheme one an invention technological system schematic diagram.
Among the figure: 1. first semiconductor laser, 2. second semiconductor laser, 3. first coupler, 4. second coupler; 5. the 3rd coupler, 6. the 4th coupler, 7. first optical fiber, 8. second optical fiber; 9. first fiber grating, 10. second fiber grating, 11. first optical isolators; 12. second optical isolator, 13. the 3rd optical isolators, 14. pump light speculums.
Fig. 2 is scheme two invention technological system schematic diagrams.
Among the figure: 1. first semiconductor laser, 3. first coupler, 4. second coupler, 5. the 3rd coupler; 6. the 4th coupler, 7. first optical fiber, 8. second optical fiber; 11. first optical isolator, 12. second optical isolators, 13. the 3rd optical isolators; 15. the 4th optical isolator, 14. pump light speculums, 16. fiber gratings.
Embodiment
At first combine the embodiment of 1 pair of system schema one of accompanying drawing to carry out detailed description below:
Be based on the fiber ring laser system at random of linear cavity fiber laser in this programme; System is referring to Fig. 1, comprises first semiconductor laser 1, second semiconductor laser 2, first coupler 3, second coupler 4, the 3rd coupler 5, the 4th coupler 6, first optical fiber 7, second optical fiber 8, first fiber grating 9, second fiber grating 10, first optical isolator 11, second optical isolator 12, the 3rd optical isolator 13, pump light speculum 14.
Linear cavity fiber laser is made up of first semiconductor laser 1, second semiconductor laser 2, first coupler 3, second coupler 4, first optical fiber 7, first fiber grating 9, second fiber grating 10.First semiconductor laser 1 and second semiconductor laser, 2 emitted laser are coupled in first optical fiber 7 through first coupler 3 and second coupler 4 respectively as the pump light source of fiber laser, and first optical fiber 7 is the laser mediums in the fiber laser.First optical fiber 7 can be the optical fiber of photonic crystal fiber, highly nonlinear optical fiber, plastic fiber, rare-earth doped optical fibre or other kind.First fiber grating 9 and second fiber grating 10 are formed the resonant cavity of fiber laser, and have the frequency-selecting effect.The fiber laser of being made up of said elements can be photon crystal optical laser device, nonlinear optical fibre laser (Raman fiber lasers and Brillouin optical fiber laser etc.), plastic fiber laser, Rear Earth Doped Fiber Laser or the like according to the difference of gain media., be coupled in second optical fiber 8 as the pump light of fiber laser at random by the fiber laser emitting laser through first optical isolator 11 and the 3rd coupler 5.Second optical fiber 8 is gain medias of fiber laser at random, and second optical fiber 8 can be the optical fiber of photonic crystal fiber, highly nonlinear optical fiber, plastic fiber, rare-earth doped optical fibre or other kind.The inclined-plane is cut at second optical fiber, 8 two ends, gets into fiber core with the Fresnel reflection light that stops the pump light that is caused by fiber end face.Rayleigh rear orientation light in second optical fiber 8 will be if through producing Random Laser after the Raman amplification.The frequency of Random Laser has the 13THz frequency displacement with respect to the pumping light frequency.In order to improve the laser utilance, residual pump light, is coupled in second optical fiber 8 through the 4th coupler 6 by 14 reflections of pump light speculum.In second optical fiber 8, produce back to rayleigh scattered radiation through twice in addition repeatedly amplify after, through the 3rd coupler 5 and 13 outputs of the 3rd optical isolator, thereby obtain Random Laser.Second optical isolator 12 is to get in the optical fiber for the reverberation that stops fiber end face to cause.
Combine the embodiment of 2 pairs of system schemas two of accompanying drawing to carry out detailed description at last:
Be based on the accidental laser system of ring property cavity optical fibre laser in this programme; System is referring to Fig. 2, comprises first semiconductor laser 1, first coupler 3, second coupler 4, the 3rd coupler 5, the 4th coupler 6, first optical fiber 7, second optical fiber 8, first optical isolator 11, second optical isolator 12, the 3rd optical isolator 13, the 4th optical isolator 15, pump light speculum 14, fiber grating 16.
Circular cavity optic fibre laser is made up of first semiconductor laser 1, first coupler 3, first optical fiber 7, first optical isolator 11 and second coupler 4.The laser that first semiconductor laser 1 sends is coupled into first optical fiber 7 through first coupler 3.First optical fiber 7 can be the optical fiber of photonic crystal fiber, highly nonlinear optical fiber, plastic fiber, rare-earth doped optical fibre or other kind.First optical isolator 11 can make the light one-way transmission.Light in first optical fiber 7 is through port output back of second coupler 4 and via fiber grating 16 reflections, after return via second coupler 4 again, transmit the looping chambeies through first coupler 3 and first optical fiber 7 again.The laser that forms is by the another port output of second coupler 4.Circular cavity optic fibre laser can be photon crystal optical laser device, nonlinear optical fibre laser (Raman fiber lasers and Brillouin optical fiber laser etc.), plastic fiber laser, Rear Earth Doped Fiber Laser or the like., be coupled in second optical fiber 8 as the pump light of fiber laser at random by the laser of circular cavity optic fibre laser output via second optical isolator 12 and the 3rd coupler 5.Second optical fiber 8 is gain medias of fiber laser at random.Second optical fiber 8 can be the optical fiber of photonic crystal fiber, highly nonlinear optical fiber, plastic fiber, rare-earth doped optical fibre or other kind.The inclined-plane is cut at second optical fiber, 8 two ends, gets into fiber core with the Fresnel reflection light that stops the pump light that is caused by fiber end face.Rayleigh rear orientation light in second optical fiber 8 will be if through producing Random Laser after the Raman amplification.The frequency of Random Laser has the 13THz frequency displacement with respect to the pumping light frequency.In order to improve the laser utilance, residual pump light, is coupled in second optical fiber 8 through the 4th coupler 6 by 14 reflections of pump light speculum.In second optical fiber 8, produce back to rayleigh scattered radiation through twice in addition repeatedly amplify after, through the 3rd coupler 5 and 15 outputs of the 4th optical isolator, thereby obtain Random Laser.The 3rd optical isolator 13 is to get in the optical fiber for the reverberation that stops fiber end face to cause.
When light transmitted in optical fiber, because the inhomogeneous generation coherent scattering of refractive index of fiber medium has formed distributed Rayleigh scattering (RS), most scattered photon let out from fiber cores, and the backscattered photons of having only minority is along Optical Fiber Transmission.If pump light has produced distributed gain in optical fiber.If the overall gain of rear orientation light is during greater than total losses, backward scattered photon just is exaggerated formation laser.The frequency of shoot laser is relevant with the amplification type, if Raman amplifies, the frequency of the Random Laser of generation is the result that the pumping light frequency moves down 13THz.
Above-mentioned instantiation has been described in realization in order to demonstrate the invention.But other variations of the present invention and modification it will be apparent to those skilled in the art that, do not have the essence and any modification/variation in the basic principle scope of disclosure or imitate conversion all to belong to claim protection range of the present invention in the present invention.
Claims (3)
1. fiber laser at random is characterized in that, is one of following two kinds of schemes:
Scheme one comprises first semiconductor laser, second semiconductor laser, first coupler, second coupler, the 3rd coupler, the 4th coupler, first optical fiber, second optical fiber, first fiber grating, second fiber grating, first optical isolator, second optical isolator, the 3rd optical isolator, pump light speculum;
Wherein:
First semiconductor laser is coupled in first optical fiber pump light as fiber laser through first coupler and first fiber grating successively; Second semiconductor laser is coupled in first optical fiber another bundle pump light as fiber laser through second coupler and second fiber grating successively; First optical fiber is the laser medium of fiber laser, and first fiber grating and second fiber grating are formed the resonant cavity of fiber laser;
The shoot laser conduct of fiber laser is the pump light of fiber laser at random, is coupled into second optical fiber through first optical isolator and the 3rd coupler; Second optical fiber is the laser medium of fiber laser at random; Second optical fiber, one end connects the pump light speculum and second optical isolator respectively through the 4th coupler, and the other end connects the 3rd optical isolator through the 3rd coupler; In second optical fiber, produce back to rayleigh scattered radiation through twice even repeatedly amplify the back and form Random Laser, through the 3rd coupler and the output of the 3rd optical isolator;
Scheme two comprises first semiconductor laser, first coupler, second coupler, the 3rd coupler, the 4th coupler, first optical fiber, second optical fiber, first optical isolator, second optical isolator, the 3rd optical isolator, the 4th optical isolator, pump light speculum, fiber grating;
Wherein:
First semiconductor laser is coupled into first optical fiber as the pump light of fiber laser through first coupler; First optical fiber is the laser medium of fiber laser; First optical fiber connects first optical isolator; First optical isolator connects an end of second coupler, and second coupler also is connected with fiber grating, and second coupler is connected to the first coupler looping cavity optical fibre laser;
Fiber laser output light is exported the also conduct pump light of fiber laser at random through second coupler; Second coupler connects second optical isolator; Second optical isolator connects second optical fiber through the 3rd coupler; Second optical fiber is the laser medium of fiber laser at random; Second optical fiber, one end connects pump light speculum and the 3rd optical isolator respectively through the 4th coupler, and the second optical fiber other end connects the 4th optical isolator through the 3rd coupler; In second optical fiber, produce back to rayleigh scattered radiation through twice even repeatedly amplify the back and form Random Laser, through the 3rd coupler and the output of the 4th optical isolator.
2. fiber laser at random according to claim 1 is characterized in that: first coupler, second coupler, the 3rd coupler, the 4th coupler are wavelength division multiplexer or circulator.
3. fiber laser at random according to claim 1 is characterized in that: first optical fiber and second optical fiber are photonic crystal fiber, highly nonlinear optical fiber, plastic fiber or rare-earth doped optical fibre.
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| CN103022866A (en) * | 2012-12-17 | 2013-04-03 | 北京化工大学 | Modulated oscillator power amplifier (MOPA) type random fiber optic laser device |
| CN103762485A (en) * | 2014-01-21 | 2014-04-30 | 中国计量学院 | Multi-wavelength optical fiber laser based on chirp grating and random distribution feedback |
| CN103825169A (en) * | 2014-03-03 | 2014-05-28 | 中国计量学院 | Fiber laser based on doped fiber random phase shift raster |
| CN103825170A (en) * | 2014-03-03 | 2014-05-28 | 杭州光络科技有限公司 | Random distributed feedback fiber laser based on semiconductor optical amplifier |
| CN106848815A (en) * | 2017-01-19 | 2017-06-13 | 中国人民解放军国防科学技术大学 | A kind of high-power random fiber laser based on load hydrogen optical fiber |
| CN111162437A (en) * | 2020-02-17 | 2020-05-15 | 北京工业大学 | Random laser |
| US10923881B2 (en) | 2017-11-16 | 2021-02-16 | Taiyuan University Of Technology | Monolithic integrated semiconductor random laser |
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| WO2022064832A1 (en) * | 2020-09-24 | 2022-03-31 | 株式会社フジクラ | Fiber laser device |
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| CN103022866A (en) * | 2012-12-17 | 2013-04-03 | 北京化工大学 | Modulated oscillator power amplifier (MOPA) type random fiber optic laser device |
| CN103762485A (en) * | 2014-01-21 | 2014-04-30 | 中国计量学院 | Multi-wavelength optical fiber laser based on chirp grating and random distribution feedback |
| CN103825169A (en) * | 2014-03-03 | 2014-05-28 | 中国计量学院 | Fiber laser based on doped fiber random phase shift raster |
| CN103825170A (en) * | 2014-03-03 | 2014-05-28 | 杭州光络科技有限公司 | Random distributed feedback fiber laser based on semiconductor optical amplifier |
| CN106848815A (en) * | 2017-01-19 | 2017-06-13 | 中国人民解放军国防科学技术大学 | A kind of high-power random fiber laser based on load hydrogen optical fiber |
| CN106848815B (en) * | 2017-01-19 | 2023-10-13 | 中国人民解放军国防科学技术大学 | High-power random fiber laser based on hydrogen-carrying fiber |
| US10923881B2 (en) | 2017-11-16 | 2021-02-16 | Taiyuan University Of Technology | Monolithic integrated semiconductor random laser |
| CN111162437A (en) * | 2020-02-17 | 2020-05-15 | 北京工业大学 | Random laser |
| WO2022064832A1 (en) * | 2020-09-24 | 2022-03-31 | 株式会社フジクラ | Fiber laser device |
| JPWO2022064832A1 (en) * | 2020-09-24 | 2022-03-31 | ||
| JP7355945B2 (en) | 2020-09-24 | 2023-10-03 | 株式会社フジクラ | fiber laser equipment |
| CN113540948A (en) * | 2021-06-30 | 2021-10-22 | 深圳公大激光有限公司 | Polarization-maintaining random green light and ultraviolet light laser |
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| CN102801091B (en) | 2014-06-18 |
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