CN104701716A - Multiple wavelength random optical fiber laser based on fully open cavity - Google Patents
Multiple wavelength random optical fiber laser based on fully open cavity Download PDFInfo
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- CN104701716A CN104701716A CN201510125085.0A CN201510125085A CN104701716A CN 104701716 A CN104701716 A CN 104701716A CN 201510125085 A CN201510125085 A CN 201510125085A CN 104701716 A CN104701716 A CN 104701716A
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Abstract
The invention discloses a multiple wavelength random optical fiber laser based on a fully open cavity, and belongs to the technical field of optical fiber lasers. The multiple wavelength random optical fiber laser based on the fully open cavity is composed of a Brillouin pumping laser source, an optical isolator, a coupler, an erbium-doped optical fiber pumping laser source, a wavelength division multiplexer, an erbium-doped optical fiber, a first random distribution feedback optical fiber and a second random distribution feedback optical fiber. The multiple wavelength random optical fiber laser based on the fully open cavity uses the second random distribution feedback optical fiber, the coupler, the wavelength division multiplexer, the erbium-doped optical fiber and the first random distribution feedback optical fiber to form the linear fully open cavity, provides random feedback, uses stimulated Brillouin scattering and the erbium-doped optical fiber to provide hybrid gain, and obtains and outputs random lasers simple in structure, easy to manufacture, low in threshold power, and large in number of output wavelengths.
Description
Technical field
The present invention relates to a kind of random fiber laser, particularly relate to a kind of multi-wavelength random fiber laser based on Full-open chamber, belong to fiber laser technology field.
Background technology
Be different from traditional laser, random fiber laser is a kind of novel without cavity laser, and it utilizes the multiple scattering effect of light in random medium to realize Laser output.Random fiber laser mainly utilizes the rayleigh backscattering in optical fiber to realize random distribution feedback, because rayleigh backscattering is more weak, present most of random fiber laser utilizes the excited Raman effect in optical fiber to realize the amplification of light signal, but has the shortcomings such as laser threshold power is high, conversion efficiency is low, output wavelength is few based on the random fiber laser of excited Raman effect.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, object of the present invention provides a kind of multi-wavelength random fiber laser based on Full-open chamber, and this laser has the features such as structure is simple, making is easy, threshold power is low, output wavelength number is many.
The technical scheme that the present invention takes for technical solution problem is:
A kind of multi-wavelength random fiber laser based on Full-open chamber, it is characterized in that, comprise Brillouin's pump laser source (1), optical isolator (2), coupler (3), Er-doped fiber pump laser source (4), wavelength division multiplexer (5), Er-doped fiber (6), the first random distribution feedback optical fiber (7), the second random distribution feedback optical fiber (8), described Brillouin's pump laser source (1) is connected with optical isolator (2) one end, optical isolator (2) other end is connected with coupler Single port (100), coupler three port (102) is connected with wavelength division multiplexer Single port (103), Er-doped fiber pump laser source (4) is connected with wavelength division multiplexer Two-port netwerk (104), wavelength division multiplexer three port (105) is connected with Er-doped fiber (6) one end, Er-doped fiber (6) other end and the first random distribution are fed back optical fiber (7) one end and are connected, second random distribution feedback optical fiber (8) one end is connected with coupler Two-port netwerk (101), second random distribution feedback optical fiber (8), coupler (3), wavelength division multiplexer (5), Er-doped fiber (6) and the first random distribution feedback optical fiber (7) Full-open chamber that composition one is linear jointly, there is provided random feedback, the Random Laser of generation exports from the first random distribution feedback optical fiber (7) and the second random distribution feedback optical fiber (8) other end.
The first described random distribution feedback optical fiber (7) and the second random distribution feedback optical fiber (8) are made up of quartz material, multicomponent glass, fluoride or polymeric material.
The first described random distribution feedback optical fiber (7) and the second random distribution feedback optical fiber (8) are monomode fiber, dispersion shifted optical fiber, dispersion compensating fiber, highly nonlinear optical fiber or high nonlinear dispersion shifted fiber, and length is 1km ~ 200km.
Beneficial effect of the present invention:
1, utilize Er-doped fiber to the amplification of light, reduce laser threshold power;
2, utilize stimulated Brillouin scattering and Er-doped fiber hybrid gain, obtain the short multiwavelength laser of wavelength spacing and export;
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
Fig. 1 is the structural representation of a kind of multi-wavelength random fiber laser based on Full-open chamber of the present invention.
1 is Brillouin's pump laser source; 2 is optical isolator; 3 is coupler; 4 Er-doped fiber pump laser source; 5 wavelength division multiplexers; 6 is Er-doped fiber; 7 is the first random distribution feedback optical fiber; 8 is the second random distribution feedback optical fiber; 100 is coupler Single port; 101 is coupler Two-port netwerk; 102 is coupler three port; 103 is wavelength division multiplexer Single port; 104 is wavelength division multiplexer Two-port netwerk; 105 is wavelength division multiplexer three port.
Concrete execution mode
Elaborate below in conjunction with structure of the present invention and operation principle:
In Fig. 1, a kind of multi-wavelength random fiber laser based on Full-open chamber, it is characterized in that, comprise Brillouin's pump laser source 1, optical isolator 2, coupler 3, Er-doped fiber pump laser source 4, wavelength division multiplexer 5, Er-doped fiber 6, first random distribution feedback optical fiber 7, second random distribution feedback optical fiber 8; Described Brillouin's pump laser source 1 is connected with optical isolator 2 one end, optical isolator 2 other end is connected with coupler Single port 100, coupler three port one 02 is connected with wavelength division multiplexer Single port 103, Er-doped fiber pump laser source 4 is connected with wavelength division multiplexer Two-port netwerk 104, wavelength division multiplexer three port one 05 is connected with Er-doped fiber 6 one end, Er-doped fiber 6 other end and the first random distribution are fed back optical fiber 7 one end and are connected, and the second random distribution feedback optical fiber 8 is connected with coupler Two-port netwerk 101; Second random distribution feedback optical fiber 8, coupler 3, wavelength division multiplexer 5, Er-doped fiber 6 and the first random distribution feedback optical fiber 7 Full-open chamber that composition one is linear jointly, there is provided random feedback, the Random Laser of generation exports from the first random distribution feedback optical fiber 7 and the second random distribution feedback optical fiber 8 other end.
A kind of operation principle of the multi-wavelength random fiber laser based on Full-open chamber:
After each parts of a kind of multi-wavelength random fiber laser based on Full-open chamber according to Fig. 1 connect.Erbium ion in Er-doped fiber 6 is excited under the effect of Er-doped fiber pump laser source 4, is in excitation state, can produce amplification to the light signal in optical fiber.The laser that Brillouin's pump laser source 1 sends is after optical isolator 2, coupler 3, wavelength division multiplexer 5, be exaggerated in Er-doped fiber, then enter in the first random distribution feedback optical fiber 7, in the first random distribution feedback optical fiber 7, produce stimulated Brillouin scattering and Rayleigh scattering, thus produce the rayleigh backscattering of single order stimulated Brillouin scattering and the Brillouin's pumping laser propagated dorsad.The single order stimulated Brillouin scattering propagated dorsad and the rayleigh backscattering of Brillouin's pumping laser are after Er-doped fiber 6 amplifies, successively by wavelength division multiplexer 5, coupler 3, in the second random distribution feedback optical fiber 8, produce the rayleigh backscattering of second order stimulated Brillouin scattering and single order stimulated Brillouin scattering.When pump power is enough high, due to the saturation effect of low order Brillouin scattering, high-order Brillouin scattering constantly produces, each rank stimulated Brillouin scattering of generation and rayleigh backscattering light oscillate in linear Full-open chamber, and the Random Laser finally realizing multi-wavelength exports.
Embodiment
Fig. 1 is the structural representation of a kind of multi-wavelength random fiber laser based on Full-open chamber of the present invention.Wherein Brillouin's pump laser source 1 wavelength is 1550nm, coupler 3 splitting ratio is 30/70, Er-doped fiber pump laser source 4 wavelength is 980nm, wavelength division multiplexer 5 is 980nm/1550nm, Er-doped fiber 6 length is 2m, first random distribution feedback optical fiber 7 and the second random distribution feedback optical fiber 8 are monomode fiber, and length is 20km.
Brillouin's pump laser source 1 of 1550nm is connected with optical isolator 2 one end, optical isolator 2 other end is connected with coupler Single port 100, coupler three port one 02 is connected with wavelength division multiplexer Single port 103, the Er-doped fiber pump laser source 4 of 980nm is connected with wavelength division multiplexer Two-port netwerk 104, wavelength division multiplexer three port one 05 is connected with Er-doped fiber 6 one end of 2m, Er-doped fiber 6 other end and first random distribution of 20km are fed back optical fiber 7 one end and are connected, and the second random distribution feedback optical fiber 8 of 20km is connected with coupler Two-port netwerk 101; First random distribution feedback optical fiber 7 and the second random distribution feedback optical fiber 8 provide random feedback, and laser exports from the first random distribution feedback optical fiber 7 and the second random distribution feedback optical fiber 8 other end.Erbium ion in the Er-doped fiber 6 of 2m is excited under the effect of the Er-doped fiber pump laser source 4 of 980nm, is in excitation state, can produce amplification to the light signal in optical fiber.The 1550nm laser that Brillouin's pump laser source 1 sends is after optical isolator 2, coupler 3, wavelength division multiplexer 5, be exaggerated in Er-doped fiber, then enter in the first random distribution feedback optical fiber 7 of 20km, in the first random distribution feedback optical fiber 7, produce stimulated Brillouin scattering and Rayleigh scattering, thus produce the rayleigh backscattering of 1550.088nm single order stimulated Brillouin scattering and the 1550nm Brillouin pumping laser propagated dorsad.The single order stimulated Brillouin scattering propagated dorsad and the rayleigh backscattering of Brillouin's pumping laser are after Er-doped fiber 6 amplifies, successively by wavelength division multiplexer 5, coupler 3, in the second random distribution feedback optical fiber 8 of 20km, produce the rayleigh backscattering of 1550.176nm second order stimulated Brillouin scattering and 1550.088nm single order stimulated Brillouin scattering.When pump power is enough high, due to the saturation effect of low order Brillouin scattering, high-order Brillouin scattering constantly produces, each rank stimulated Brillouin scattering of generation and rayleigh backscattering light oscillate in linear Full-open chamber, and the Random Laser finally realizing multi-wavelength exports.
Above embodiment is one of preferred version in all schemes of the present invention, and other all belongs to the simple change of the multi-wavelength random fiber laser structure based on Full-open chamber the scope that the present invention protects.
Claims (3)
1. the multi-wavelength random fiber laser based on Full-open chamber, it is characterized in that, comprise Brillouin's pump laser source (1), optical isolator (2), coupler (3), Er-doped fiber pump laser source (4), wavelength division multiplexer (5), Er-doped fiber (6), the first random distribution feedback optical fiber (7), the second random distribution feedback optical fiber (8), described Brillouin's pump laser source (1) is connected with optical isolator (2) one end, optical isolator (2) other end is connected with coupler Single port (100), coupler three port (102) is connected with wavelength division multiplexer Single port (103), Er-doped fiber pump laser source (4) is connected with wavelength division multiplexer Two-port netwerk (104), wavelength division multiplexer three port (105) is connected with Er-doped fiber (6) one end, Er-doped fiber (6) other end and the first random distribution are fed back optical fiber (7) one end and are connected, second random distribution feedback optical fiber (8) one end is connected with coupler Two-port netwerk (101), second random distribution feedback optical fiber (8), coupler (3), wavelength division multiplexer (5), Er-doped fiber (6) and the first random distribution feedback optical fiber (7) Full-open chamber that composition one is linear jointly, there is provided random feedback, the Random Laser of generation exports from the first random distribution feedback optical fiber (7) and the second random distribution feedback optical fiber (8) other end.
2. a kind of multi-wavelength random fiber laser based on Full-open chamber according to claim 1, it is characterized in that, the first described random distribution feedback optical fiber (7) and the second random distribution feedback optical fiber (8) are made up of quartz material, multicomponent glass, fluoride or polymeric material.
3. a kind of multi-wavelength random fiber laser based on Full-open chamber according to claim 1, it is characterized in that, the first described random distribution feedback optical fiber (7) and the second random distribution feedback optical fiber (8) are 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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| CN201510125085.0A CN104701716A (en) | 2015-03-20 | 2015-03-20 | Multiple wavelength random optical fiber laser based on fully open cavity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165541A (en) * | 2019-06-17 | 2019-08-23 | 南京邮电大学 | Changeable Brillouin-Er-doped fiber the accidental laser in wavelength interval |
| CN111106517A (en) * | 2019-12-26 | 2020-05-05 | 上海频准激光科技有限公司 | Erbium-doped fiber laser with same pump for random Raman fiber laser |
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| CN102231476A (en) * | 2011-05-20 | 2011-11-02 | 北京化工大学 | Random fiber laser of semiconductor laser cascaded pump |
| 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 |
| CN203787754U (en) * | 2014-01-21 | 2014-08-20 | 中国计量学院 | Multi-wavelength fiber laser based on chirp grating and random distribution feedback |
| CN203911220U (en) * | 2014-05-08 | 2014-10-29 | 中国计量学院 | Multi-wavelength fiber laser based on random distribution feedback |
| CN204424678U (en) * | 2015-03-20 | 2015-06-24 | 中国计量学院 | A kind of multi-wavelength random fiber laser based on Full-open chamber |
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| CN102231476A (en) * | 2011-05-20 | 2011-11-02 | 北京化工大学 | Random fiber laser of semiconductor laser cascaded pump |
| 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 |
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| H AHMAD ET AL.: ""Distributed feedback multimode Brillouin-Raman random fiber laser in the S-band"", 《LASER PHYSICS LETTERS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165541A (en) * | 2019-06-17 | 2019-08-23 | 南京邮电大学 | Changeable Brillouin-Er-doped fiber the accidental laser in wavelength interval |
| CN111106517A (en) * | 2019-12-26 | 2020-05-05 | 上海频准激光科技有限公司 | Erbium-doped fiber laser with same pump for random Raman fiber laser |
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