CN203850613U - Multi-wavelength Brillouin-Er-doped fiber laser based on semi-open cavity - Google Patents
Multi-wavelength Brillouin-Er-doped fiber laser based on semi-open cavity Download PDFInfo
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- CN203850613U CN203850613U CN201420240132.7U CN201420240132U CN203850613U CN 203850613 U CN203850613 U CN 203850613U CN 201420240132 U CN201420240132 U CN 201420240132U CN 203850613 U CN203850613 U CN 203850613U
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Abstract
The utility model designs a multi-wavelength Brillouin-Er-doped fiber laser based on a semi-open cavity and belongs to the technical field of fiber lasers. The multi-wavelength Brillouin-Er-doped fiber laser is composed of a Brillouin pump laser source, an isolator, a first annular device, an Er-doped fiber pump laser source, a wavelength division multiplexing device, an Er-doped fiber, a second annular, a single-mode fiber, and a random distribution feedback fiber. According to the multi-wavelength Brillouin-Er-doped fiber laser, the first annular, the wavelength division multiplexing device, the Er-doped fiber, the second annular and the single-mode fiber form an annular structure, and the annular structure and the random distribution feedback fiber jointly form a semi-open resonant cavity; and a feedback optical signal is independently amplified with the Er-doped fiber, so that the feedback optical signal is amplified to the largest extent, laser oscillation is achieved, and the multi-wavelength random laser output is finally achieved.
Description
Technical field
The utility model relates to a kind of random fiber laser, relates in particular to a kind of multi-wavelength optical fiber laser based on semi-open chamber and the two gains of Brillouin-Er-doped fiber, belongs 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.Often there is the shortcomings such as Laser output dependence of angle and high threshold power in traditional accidental laser.And optical fiber has fabulous two dimensional constraint, this type of random fiber laser 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 the random fiber laser gaining based on Raman effect has the shortcomings such as laser threshold power is high, conversion efficiency is low, output wavelength is few.
Summary of the invention
The purpose of this utility model is to provide a kind of multi-wavelength Brillouin-erbium doped fiber laser based on semi-open chamber, this fiber laser utilizes Er-doped fiber to amplify light signal fed back, obtain the output of multi-wavelength Random Laser, have simple in structure, threshold power is low, output wavelength is many, wavelength interval is short and the feature such as even.
The technical scheme that the utility model adopts is:
Based on the multi-wavelength Brillouin-erbium doped fiber laser in semi-open chamber, comprise Brillouin's pump laser source (1), isolator (2), the first circulator (3), Er-doped fiber pump laser source (4), wavelength division multiplexer (5), Er-doped fiber (6), the second circulator (7), monomode fiber (8), random distribution feedback optical fiber (9), it is characterized in that: described Brillouin's pump laser source (1) is connected with isolator (2) input, isolator (2) output is connected with the first circulator one port (100), the first circulator two ports (101) are connected with monomode fiber (8) one end, the other end of monomode fiber (8) is connected with the second circulator three ports (108), the first circulator three ports (102) are connected with wavelength division multiplexer one port (103), wavelength division multiplexer two ports (104) are connected with Er-doped fiber pump laser source (4), wavelength division multiplexer three ports (105) are connected with Er-doped fiber (6), the other end of Er-doped fiber (6) is 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 (9), the other end of random distribution feedback optical fiber (9) is as Laser output, described the first circulator (3), wavelength division multiplexer (5), Er-doped fiber (6), the second circulator (7), a loop configuration of monomode fiber (8) composition, jointly form a semi-open resonant cavity with random distribution feedback optical fiber (9), form laser generation, finally realize the Random Laser output of multi-wavelength.
Described monomode fiber (8) produces stimulated Brillouin scattering and rayleigh backscattering dorsad, forms feedback mechanism, and Er-doped fiber for light signal fed back (6) amplifies separately, has realized to greatest extent the amplification of light signal fed back.
Described random distribution feedback optical fiber (9) is made up of quartz material, multicomponent glass, fluoride or polymeric material.
Described random distribution feedback optical fiber (9) is monomode fiber, dispersion shifted optical fiber, dispersion compensating fiber, highly nonlinear optical fiber or high nonlinear dispersion shifted fiber, and length is 1km～200km.
The beneficial effects of the utility model are:
1, utilize semi-open cavity configurations, light signal fed back is gained fully, thereby reduce the threshold power of multi-wavelength random fiber laser, effectively eliminate odd even excited Brillouin stockes line peak power difference simultaneously;
2, utilize stimulated Brillouin scattering and Er-doped fiber as two gains, can obtain the short and uniform multi-wavelength Random Laser output of wavelength spacing.
Brief description of the drawings
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Fig. 1 is the structural representation of a kind of multi-wavelength Brillouin-erbium doped fiber laser based on semi-open chamber of the utility model.
In Fig. 1: 1 is Brillouin's pump laser source; 2 is isolator; 3 is the first circulator; 4 is Er-doped fiber pump laser source; 5 is wavelength division multiplexer; 6 is Er-doped fiber; 7 is the second circulator; 8 is monomode fiber; 9 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
Elaborate below in conjunction with structure of the present utility model and operation principle:
In Fig. 1, based on the multi-wavelength Brillouin-erbium doped fiber laser in semi-open chamber, comprise Brillouin's pump laser source 1, isolator 2, the first circulator 3, Er-doped fiber pump laser source 4, wavelength division multiplexer 5, Er-doped fiber 6, the second circulator 7, monomode fiber 8 and random distribution feedback optical fiber 9, described Brillouin's pump laser source 1 is connected with isolator 2 inputs, isolator 2 outputs are connected with the first circulator one port 100, the first circulator two port ones 01 are connected with monomode fiber 8, the other end of monomode fiber 8 is connected with the second circulator three port ones 08, the first circulator three port ones 02 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 4, wavelength division multiplexer three port ones 05 are connected with Er-doped fiber 6 one end, the other end of Er-doped fiber 6 is 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 9, the other end of random distribution feedback optical fiber 9 is exported as Random Laser, described the first circulator 3, wavelength division multiplexer 5, Er-doped fiber 6, the second circulator 7, monomode fiber 8 form a loop configuration, form a semi-open resonant cavity with random distribution feedback optical fiber 9 is common, utilize above-mentioned connected mode, the light signal fed back that monomode fiber 8 produces is amplified with Er-doped fiber 6, thereby realize to greatest extent the amplification of light signal fed back, and form laser generation, finally realize the Random Laser output of multi-wavelength.
A kind of operation principle of the multi-wavelength Brillouin-erbium doped fiber laser based on semi-open chamber:
A kind of multi-wavelength Brillouin-erbium doped fiber laser based on semi-open chamber connects according to the each parts shown in Fig. 1, the Er3+ in Er-doped fiber 6 is energized into high level by the laser of Er-doped fiber pump laser source 4, and the laser of Brillouin's pump laser source 1 enters the monomode fiber 8 in loop configuration by isolator 2 and the first circulator 3.In monomode fiber 8, stimulated Brillouin scattering effect be will form, the single order stimulated Brillouin scattering of counterclockwise propagation and the rayleigh backscattering of Brillouin's pumping laser produced.The single order stimulated Brillouin scattering of counterclockwise propagating and the rayleigh backscattering light of Brillouin's pumping laser are amplified by Er-doped fiber 6 after the first circulator 3 and wavelength division multiplexer 5, through the second circulator 7, enter random distribution feedback optical fiber 9.If Brillouin's pump power is enough high, the single order stimulated Brillouin scattering power of generation occurs saturated, in random distribution feedback optical fiber 9, 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 9, 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 10.In the time that Brillouin's pump power is enough high, due to the saturation effect of low order stimulated Brillouin scattering, high-order stimulated Brillouin scattering constantly produces, and finally realizes the Random Laser output of multi-wavelength.
Embodiment
Embodiment of the present utility model as shown in Figure 1, wherein Brillouin's pump laser source 1 wavelength is 1550nm, Er-doped fiber pump laser source 4 wavelength are 980nm, Er-doped fiber 6 length are 1m, monomode fiber 8 length are 10km, the monomode fiber that random distribution feedback optical fiber 9 is 20km, wavelength division multiplexer 5 operation wavelengths are 980nm/1550nm.
1550nm Brillouin pump laser source 1 is connected with isolator 2 inputs, and isolator 2 outputs are connected with the first circulator one port 100, and the first circulator two port ones 01 are connected with the monomode fiber 8 of 10km.The other end of monomode fiber 8 is connected with the second circulator three port ones 08, wavelength division multiplexer one port 103 that the first circulator three port ones 02 are 1550nm with operation wavelength is connected, operation wavelength is that wavelength division multiplexer two port ones 04 of 980nm are connected with 980nm Er-doped fiber pump laser source 4, wavelength division multiplexer three port ones 05 are connected with the Er-doped fiber 6 of 1m, the other end of Er-doped fiber 6 is connected with the second circulator one port 106, the second circulator two port ones 07 are connected with one end of the random distribution feedback optical fiber 9 of 20km, the other end of random distribution feedback optical fiber 9 is exported as Random Laser.1550nm Brillouin pumping source 1 is through isolator 2, entered after loop configuration by the first circulator one port 100, in monomode fiber 8, produce single order stimulated Brillouin scattering and rayleigh backscattering, the single order stimulated Brillouin scattering producing and rayleigh backscattering light are counterclockwise propagated, after the first circulator 3 and wavelength division multiplexer 5, Er-doped fiber 6 by 1m amplifies, and then enters the random distribution feedback optical fiber 9 of 20km via the second circulator 7.If the power of 1550nm Brillouin pumping laser is enough high, the power of single order stimulated Brillouin scattering will reach capacity, and produce the rayleigh backscattering of second order excited Brillouin backscattering and single order excited Brillouin at random distribution feedback optical fiber 9.This process is constantly carried out, and just can produce more high-order stimulated Brillouin scattering.All stimulated Brillouin scatterings and rayleigh backscattering light can partly be reflected back in loop configuration, and remaining each rank stimulated Brillouin scattering light and rayleigh backscattering light, from 9 other end outputs of random distribution feedback optical fiber, are realized 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 optical fiber laser structure based on random distribution feedback all belongs to the scope that the present invention protects.
Claims (4)
1. multi-wavelength Brillouin-the erbium doped fiber laser based on semi-open chamber, comprises Brillouin's pump laser source (1), isolator (2), the first circulator (3), Er-doped fiber pump laser source (4), wavelength division multiplexer (5), Er-doped fiber (6), the second circulator (7), monomode fiber (8), random distribution feedback optical fiber (9), it is characterized in that: described Brillouin's pump laser source (1) is connected with isolator (2) input, isolator (2) output is connected with the first circulator one port (100), the first circulator two ports (101) are connected with monomode fiber (8) one end, the other end of monomode fiber (8) is connected with the second circulator three ports (108), the first circulator three ports (102) are connected with wavelength division multiplexer one port (103), wavelength division multiplexer two ports (104) are connected with Er-doped fiber pump laser source (4), wavelength division multiplexer three ports (105) are connected with Er-doped fiber (6), the other end of Er-doped fiber (6) is 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 (9), the other end of random distribution feedback optical fiber (9) is as Laser output, described the first circulator (3), wavelength division multiplexer (5), Er-doped fiber (6), the second circulator (7), a loop configuration of monomode fiber (8) composition, jointly form a semi-open resonant cavity with random distribution feedback optical fiber (9), form laser generation, finally realize the Random Laser output of multi-wavelength.
2. a kind of multi-wavelength Brillouin-erbium doped fiber laser based on semi-open chamber according to claim 1, it is characterized in that, described monomode fiber (8) produces stimulated Brillouin scattering and rayleigh backscattering dorsad, form feedback mechanism, Er-doped fiber for light signal fed back (6) amplifies separately, has realized to greatest extent the amplification of light signal fed back.
3. a kind of multi-wavelength Brillouin-erbium doped fiber laser based on semi-open chamber according to claim 1, it is characterized in that, described random distribution feedback optical fiber (9) is made up of quartz material, multicomponent glass, fluoride or polymeric material.
4. a kind of multi-wavelength Brillouin-erbium doped fiber laser based on semi-open chamber according to claim 1, it is characterized in that, described random distribution feedback optical fiber (9) is monomode fiber, dispersion shifted optical fiber, dispersion compensating fiber, highly nonlinear optical fiber or high nonlinear dispersion shifted fiber, and length is 1km～200km.
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| CN201420240132.7U CN203850613U (en) | 2014-05-08 | 2014-05-08 | Multi-wavelength Brillouin-Er-doped fiber laser based on semi-open cavity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109801732A (en) * | 2019-03-20 | 2019-05-24 | 中国人民解放军国防科技大学 | Two-dimensional self-cooling laser optical tweezers device and method |
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2014
- 2014-05-08 CN CN201420240132.7U patent/CN203850613U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109801732A (en) * | 2019-03-20 | 2019-05-24 | 中国人民解放军国防科技大学 | Two-dimensional self-cooling laser optical tweezers device and method |
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