CN103579894A - Multi-wavelength random fiber laser based on hybrid gain - Google Patents
Multi-wavelength random fiber laser based on hybrid gain Download PDFInfo
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Abstract
The invention discloses a multi-wavelength random fiber laser based on hybrid gain, and belongs to the technical field of fiber lasers. The fiber laser comprises a Brillouin pump laser source, an Er-doped fiber pump laser source, a first circulator, a second circulator, a wavelength division multiplexer, Er-doped fiber, fiber generating a Brillouin effect and randomly distributed feedback fiber. According to the multi-wavelength random fiber laser, the first circulator, the wavelength division multiplexer, the Er-doped fiber, the fiber generating a Brillouin effect and the second circulator constitute an annular structure, the annular structure and the randomly distributed feedback fiber jointly form a semi-open resonant cavity for laser oscillation, and light is subjected to hybrid gain amplification by stimulated Brillouin scattering and the Er-doped fiber. The laser is simple in structure, low in threshold power and long in output wavelength, and has short and equal wavelength interval.
Description
Technical field
The present invention relates to a kind of random fiber laser, relate in particular to a kind of random-distribution feedback optical fiber laser based on stimulated Brillouin scattering and Er-doped fiber hybrid gain, belong to fiber laser technology field.
Background technology
Accidental laser is the class laser based on random distribution feedback, and it utilizes the Multiple Scattering effect in Disordered Media to realize random distribution feedback.Therefore often there is Laser output dependence of angle and the high shortcomings such as threshold power in three-dimensional block accidental laser.Optical fiber has fabulous two dimensional constraint, can effectively overcome Random Laser output angle dependence and the high problem of threshold power.Random fiber laser is mainly divided three classes, and the first kind is disperseed TiO based on filling
2the photonic crystal fiber of the rhodamine 6G solution of nano particle, utilizes profile pump to obtain Random Laser output, and the method technical difficulty is large, and Output of laser wavelength is few; The Fiber Bragg Grating FBG of Equations of The Second Kind based on random distribution, can obtain the Random Laser output of low threshold power, but preparation is complicated, and output wavelength is few, and wavelength interval is unfixing; The 3rd class is based on rayleigh backscattering, due to rayleigh backscattering a little less than, current method is mainly to utilize Raman effect to amplify rayleigh backscattering signal, but has the shortcomings such as laser threshold power is high, conversion efficiency is low, output wavelength is few.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of multi-wavelength random fiber laser based on hybrid gain, this laser structure is simple, threshold power is low, output wavelength is many, Duan Qie wavelength interval, wavelength interval equates.
The present invention is that the technical scheme that technical solution problem is taked is:
A multi-wavelength random fiber laser for hybrid gain, comprises Brillouin's pump laser source (1), the first circulator (2), Er-doped fiber pump laser source (3), wavelength division multiplexer (4), Er-doped fiber (5), the optical fiber (6) that produces brillouin effect, the second circulator (7) and random distribution feedback optical fiber (8), described Brillouin's pump laser source (1) is connected with the first circulator one port (100), the first circulator two ports (101) are connected with wavelength division multiplexer one port (103), wavelength division multiplexer two ports (104) are connected with Er-doped fiber pump laser source (3), wavelength division multiplexer three ports (105) are connected with Er-doped fiber (5), the other end of Er-doped fiber (5) is connected with the optical fiber (6) that produces brillouin effect, the other end that produces the optical fiber (6) of brillouin effect is connected with the second circulator three ports (108), the first circulator three ports (102) are connected with the second circulator one port (106), the second circulator two ports (107) are connected with one end of random distribution feedback optical fiber (8), the other end of random distribution feedback optical fiber (8) is as Laser output, optical fiber (6), second circulator (7) of described the first circulator (2), wavelength division multiplexer (4), Er-doped fiber (5), generation brillouin effect form a loop configuration, jointly form a semi-open resonant cavity with random distribution feedback optical fiber (8), form laser generation, finally realize the Random Laser output of multi-wavelength.
Described Er-doped fiber pump laser source (3) is by changing pump power, and the saturation characteristic of utilizing Brillouin scattering to gain, carrys out the wavelength number of tuning operation Random Laser.
The stimulated Brillouin scattering dorsad and the rayleigh backscattering that in described random distribution feedback optical fiber (8), produce form feedback mechanism, make laser in loop configuration, form vibration, realize light amplification, reduce threshold power.
Optical fiber (6) length of described generation brillouin effect is 1km～200km, and random distribution feedback optical fiber (8) length is 1km～200km.
The optical fiber (6) of described generation brillouin effect is monomode fiber, dispersion shifted optical fiber, dispersion compensating fiber, highly nonlinear optical fiber, high nonlinear dispersion shifted fiber, and random distribution feedback optical fiber (8) is monomode fiber, dispersion shifted optical fiber, dispersion compensating fiber, highly nonlinear optical fiber, high nonlinear dispersion shifted fiber.
Beneficial effect of the present invention is:
1, utilize the linear gain of Brillouin scattering gain and Er-doped fiber as hybrid gain, the threshold power of multi-wavelength random fiber laser is significantly reduced;
2, utilize the saturation characteristic of Brillouin scattering gain, obtain wavelength interval short (0.088nm) and fixing multi-wavelength Random Laser output.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
Fig. 1 is the multi-wavelength random fiber laser structural representation that the present invention is based on hybrid gain;
Fig. 2 is the random optical-fiber laser output spectrum that the present invention is output as 1～3 wavelength;
Fig. 3 is the random optical-fiber laser output spectrum that the present invention is output as a plurality of wavelength.
1 is Brillouin's pump laser source; 2 is the first circulator; 3 is Er-doped fiber pump laser source; 4 is wavelength division multiplexer; 5 is Er-doped fiber; 6 for producing the optical fiber of brillouin effect; 7 is the second circulator; 8 is random distribution feedback optical fiber; 100 is the first circulator one port; 101 is the first circulator two ports; 102 is the first circulator three ports; 103 is wavelength division multiplexer one port; 104 is wavelength division multiplexer two ports; 105 is wavelength division multiplexer three ports; 106 is the second circulator one port; 107 is the second circulator two ports; 108 is the second circulator three ports.
Embodiment
Below in conjunction with structure of the present invention and operation principle, elaborate:
In Fig. 1, a multi-wavelength random fiber laser for hybrid gain, comprises Brillouin's pump laser source 1, the first circulator 2, Er-doped fiber pump laser source 3, wavelength division multiplexer 4, Er-doped fiber 5, the optical fiber 6 that produces brillouin effect, the second circulator 7 and random distribution feedback optical fiber 8, described Brillouin's pump laser source 1 is connected with the first circulator one port 100, the first circulator two port ones 01 are connected with wavelength division multiplexer one port 103, wavelength division multiplexer two port ones 04 are connected with Er-doped fiber pump laser source 3, wavelength division multiplexer three port ones 05 are connected with Er-doped fiber 5, the other end of Er-doped fiber 5 is connected with the optical fiber 6 that produces brillouin effect, the other end that produces the optical fiber 6 of brillouin effect is connected with the second circulator three port ones 08, the first circulator three port ones 02 are connected with the second circulator one port 106, the second circulator two port ones 07 are connected with one end of random distribution feedback optical fiber 8, the other end of random distribution feedback optical fiber 8 is as Laser output, the first described circulator 2, wavelength division multiplexer 4, Er-doped fiber 5, the optical fiber 6 that produces brillouin effect, a loop configuration of the second circulator 7 compositions, form a semi-open resonant cavity with random distribution feedback optical fiber 8 is common, form laser generation, finally realize the Random Laser output of multi-wavelength.
A kind of multi-wavelength random fiber laser operation principle based on hybrid gain:
The laser of Er-doped fiber pump laser source 3 is by the Er in Er-doped fiber 5
3+be energized into high level, the laser of Brillouin's pump laser source 1 enters in loop configuration by the first circulator 2, by Er-doped fiber 5, is amplified, and then enters the optical fiber 6 that produces brillouin effect.In the optical fiber 6 that produces brillouin effect, produce the single order stimulated Brillouin scattering of counterclockwise propagation and the rayleigh backscattering of Brillouin's pumping laser.The single order stimulated Brillouin scattering of counterclockwise propagating and the rayleigh backscattering light of Brillouin's pumping laser are amplified again by Er-doped fiber 5, then through the first circulator 2, the second circulator 7, enter random distribution feedback optical fiber 8.If Brillouin's pump power is enough high, the single order excited Brillouin power of its generation occurs saturated, in random distribution feedback optical fiber 8, can produce the second order stimulated Brillouin scattering of propagating dorsad.The new second order excited Brillouin back-scattering light producing, and the rayleigh backscattering light of single order stimulated Brillouin scattering in random distribution feedback optical fiber 8, be partly reflected back loop configuration relaying and resume and broadcast.Remaining light forms Random Laser output from the other end of random distribution feedback optical fiber 8.When Brillouin's pump power is enough high, due to the saturation effect of low order Brillouin scattering, high-order Brillouin scattering constantly produces, and finally realizes the Random Laser output of multi-wavelength.
Embodiment
Fig. 2 is the output spectrum figure of 1～3 wavelength of output, and Fig. 3 is the output spectrum figure that is output as a plurality of wavelength, and the multi-wavelength random fiber laser corresponding with it as shown in Figure 1.Wherein Er-doped fiber 5 length are 1m, the monomode fiber that the optical fiber 6 that produces brillouin effect is 10km, the monomode fiber that random distribution feedback optical fiber 8 is 20km.Brillouin's pump laser source 1 wavelength is 1550nm, and Er-doped fiber pump laser source 3 wavelength are 980nm, and wavelength division multiplexer 4 operation wavelengths are 980nm/1550nm.Be 2mW with Brillouin's pump laser source 1 pump power that in Fig. 2, three curves are corresponding from the bottom up, the pump power of Er-doped fiber pump laser source 3 is followed successively by 150mW, 227mW and 285mW.Be 2mW with Brillouin's pump laser source 1 pump power corresponding in Fig. 3, the pump power of Er-doped fiber pump laser source 3 is 425mW.
1550nm Brillouin pump laser source 1 enters loop configuration through the first circulator one port 100, the first circulator two port ones 01 are connected with wavelength division multiplexer one port 103 of 1550nm, wavelength division multiplexer two port ones 04 of 980nm are connected with 980nm Er-doped fiber pump laser source 3, wavelength division multiplexer three port ones 05 are connected with the Er-doped fiber 5 of 1m, and the other end of Er-doped fiber 5 is connected with the optical fiber 6 of the generation brillouin effect of 10km.The other end of the optical fiber 6 of the generation brillouin effect of 10km is connected with the second circulator three port ones 08, the first circulator three port ones 02 are connected with the second circulator one port 106, and the second circulator two port ones 07 are connected with one end of the random distribution feedback optical fiber 8 of 20km.The Random Laser of the other end output multi-wavelength of random distribution feedback optical fiber 8.1550nm Brillouin pump laser source 1 enters after loop configuration through the first circulator one port 100, by Er-doped fiber 5, amplified, then enter in the optical fiber 6 that produces brillouin effect and produce stimulated Brillouin scattering and rayleigh backscattering, the single order stimulated Brillouin scattering and the rayleigh backscattering light that produce are counterclockwise propagated, and again by Er-doped fiber, are amplified.Then via wavelength division multiplexer 4, the first circulator 2 and the second circulator 7, enter random distribution feedback optical fiber 8.If the power of 1550nm Brillouin pumping laser is enough high, the power of single order stimulated Brillouin scattering will reach capacity, and at random distribution feedback optical fiber 8, produce second order excited Brillouin backscattering and rayleigh backscattering.Second order Brillouin scattering, after loop configuration, arrives random distribution feedback optical fiber 8 again, produces three rank stimulated Brillouin scattering and rayleigh backscatterings.This process is constantly carried out, and just can produce more high-order Brillouin scattering.All Brillouin scatterings and rayleigh backscattering light can be fed back optical fiber 8 by random distribution and partly be reflected back in loop configuration, remaining each rank Brillouin scattering and rayleigh backscattering light, from 8 other end outputs of random distribution feedback optical fiber, produce multi-wavelength Random Laser.
Above embodiment is one of preferred version in all schemes of the present invention, and other simple change to the multi-wavelength random fiber laser structure based on hybrid gain all belongs to the scope that the present invention protects.
Claims (5)
1. the multi-wavelength random fiber laser based on hybrid gain, it is characterized in that, comprise Brillouin's pump laser source (1), the first circulator (2), Er-doped fiber pump laser source (3), wavelength division multiplexer (4), Er-doped fiber (5), the optical fiber (6) that produces brillouin effect, the second circulator (7) and random distribution feedback optical fiber (8), described Brillouin's pump laser source (1) is connected with the first circulator one port (100), the first circulator two ports (101) are connected with wavelength division multiplexer one port (103), wavelength division multiplexer two ports (104) are connected with Er-doped fiber pump laser source (3), wavelength division multiplexer three ports (105) are connected with Er-doped fiber (5), the other end of Er-doped fiber (5) is connected with the optical fiber (6) that produces brillouin effect, the other end that produces the optical fiber (6) of brillouin effect is connected with the second circulator three ports (108), the first circulator three ports (102) are connected with the second circulator one port (106), the second circulator two ports (107) are connected with one end of random distribution feedback optical fiber (8), the other end of random distribution feedback optical fiber (8) is as Laser output, optical fiber (6), second circulator (7) of described the first circulator (2), wavelength division multiplexer (4), Er-doped fiber (5), generation brillouin effect form a loop configuration, jointly form a semi-open resonant cavity with random distribution feedback optical fiber (8), form laser generation, finally realize the Random Laser output of multi-wavelength.
2. a kind of multi-wavelength random fiber laser based on hybrid gain according to claim 1, it is characterized in that, described Er-doped fiber pump laser source (3) is by changing pump power, and utilize the saturation characteristic of Brillouin scattering gain, carry out the wavelength number of tuning operation Random Laser.
3. a kind of multi-wavelength random fiber laser based on hybrid gain according to claim 1, it is characterized in that, the stimulated Brillouin scattering dorsad and the rayleigh backscattering that in described random distribution feedback optical fiber (8), produce form feedback mechanism, make laser in loop configuration, form vibration, realize light amplification, reduce threshold power.
4. a kind of multi-wavelength random fiber laser based on hybrid gain according to claim 1, it is characterized in that, optical fiber (6) length of described generation brillouin effect is 1km～200km, and random distribution feedback optical fiber (8) length is 1km～200km.
5. a kind of multi-wavelength random fiber laser based on hybrid gain according to claim 1, it is characterized in that, the optical fiber (6) of described generation brillouin effect is monomode fiber, dispersion shifted optical fiber, dispersion compensating fiber, highly nonlinear optical fiber, high nonlinear dispersion shifted fiber, and random distribution feedback optical fiber (8) is monomode fiber, dispersion shifted optical fiber, dispersion compensating fiber, highly nonlinear optical fiber, high nonlinear dispersion shifted fiber.
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Cited By (10)
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| CN105356290A (en) * | 2015-12-16 | 2016-02-24 | 重庆大学 | Ultra-narrow line width optical fiber laser device based on Rayleigh scattering and stimulated brillouin scattering |
| CN106961066A (en) * | 2017-05-17 | 2017-07-18 | 河北大学 | A kind of multi-wavelength random fiber laser of partly beginning to speak based on overlapping fiber grating |
| CN106998030A (en) * | 2017-05-17 | 2017-08-01 | 河北大学 | A kind of half-open cavate linear polarization and super-narrow line width multi-wavelength random fiber laser |
| CN107248690A (en) * | 2017-06-21 | 2017-10-13 | 电子科技大学 | One kind mixing lumen type dual wavelength narrow cable and wide optical fiber laser |
| CN107271027A (en) * | 2017-08-07 | 2017-10-20 | 电子科技大学 | A kind of optical fiber acoustic wave sensing system based on the weak anti-mirror in broadband and Random Laser |
| CN109038195A (en) * | 2018-08-09 | 2018-12-18 | 电子科技大学 | A kind of mixing lumen type cascade multi-wavelength narrow cable and wide optical fiber laser |
| CN109632076A (en) * | 2019-01-31 | 2019-04-16 | 电子科技大学 | The amplification system and method for long-distance optical fiber distribution sound wave sensing |
| CN109698460A (en) * | 2019-02-28 | 2019-04-30 | 南京邮电大学 | A kind of multi-wavelength Brillouin-Er-doped fiber accidental laser of partly beginning to speak |
| CN111244735A (en) * | 2020-01-16 | 2020-06-05 | 广东工业大学 | Annular narrow-band fiber grating random laser and method for generating random laser |
| CN112582866A (en) * | 2020-11-27 | 2021-03-30 | 北京航天测控技术有限公司 | Random fiber laser and random fiber laser generation method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105356290A (en) * | 2015-12-16 | 2016-02-24 | 重庆大学 | Ultra-narrow line width optical fiber laser device based on Rayleigh scattering and stimulated brillouin scattering |
| CN106961066A (en) * | 2017-05-17 | 2017-07-18 | 河北大学 | A kind of multi-wavelength random fiber laser of partly beginning to speak based on overlapping fiber grating |
| CN106998030A (en) * | 2017-05-17 | 2017-08-01 | 河北大学 | A kind of half-open cavate linear polarization and super-narrow line width multi-wavelength random fiber laser |
| CN107248690B (en) * | 2017-06-21 | 2019-11-12 | 电子科技大学 | A kind of mixing lumen type dual wavelength narrow cable and wide optical fiber laser |
| CN107248690A (en) * | 2017-06-21 | 2017-10-13 | 电子科技大学 | One kind mixing lumen type dual wavelength narrow cable and wide optical fiber laser |
| CN107271027A (en) * | 2017-08-07 | 2017-10-20 | 电子科技大学 | A kind of optical fiber acoustic wave sensing system based on the weak anti-mirror in broadband and Random Laser |
| CN109038195A (en) * | 2018-08-09 | 2018-12-18 | 电子科技大学 | A kind of mixing lumen type cascade multi-wavelength narrow cable and wide optical fiber laser |
| CN109038195B (en) * | 2018-08-09 | 2020-08-04 | 电子科技大学 | Mixed cavity type cascaded multi-wavelength narrow linewidth optical fiber laser |
| CN109632076A (en) * | 2019-01-31 | 2019-04-16 | 电子科技大学 | The amplification system and method for long-distance optical fiber distribution sound wave sensing |
| CN109698460A (en) * | 2019-02-28 | 2019-04-30 | 南京邮电大学 | A kind of multi-wavelength Brillouin-Er-doped fiber accidental laser of partly beginning to speak |
| CN109698460B (en) * | 2019-02-28 | 2020-12-04 | 南京邮电大学 | Semi-open cavity multi-wavelength Brillouin-erbium-doped optical fiber random laser |
| CN111244735A (en) * | 2020-01-16 | 2020-06-05 | 广东工业大学 | Annular narrow-band fiber grating random laser and method for generating random laser |
| CN112582866A (en) * | 2020-11-27 | 2021-03-30 | 北京航天测控技术有限公司 | Random fiber laser and random fiber laser generation method |
| CN112582866B (en) * | 2020-11-27 | 2022-07-26 | 北京航天测控技术有限公司 | Random fiber laser and random fiber laser generation method |
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