CN206947722U - A kind of random fiber laser based on directional scatter feedback - Google Patents
A kind of random fiber laser based on directional scatter feedback Download PDFInfo
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- CN206947722U CN206947722U CN201720776590.6U CN201720776590U CN206947722U CN 206947722 U CN206947722 U CN 206947722U CN 201720776590 U CN201720776590 U CN 201720776590U CN 206947722 U CN206947722 U CN 206947722U
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- division multiplexer
- laser
- directional scatter
- wavelength division
- random
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Abstract
The utility model discloses a kind of random fiber laser based on directional scatter feedback, belong to fiber laser technology field, be made up of pump laser source, isolator, the first wavelength division multiplexer, high germnium doped fiber, the first directional scatter, the second directional scatter, the second wavelength division multiplexer.The utility model provides light feedback using directional scatter, can effectively reduce laser threshold power.The gain of light is realized using excited Raman effect.The laser has the characteristics that simple in construction, making is easy, threshold power is low.
Description
Technical field
It the utility model is related to a kind of random fiber laser, more particularly to a kind of random light based on directional scatter feedback
Fibre laser, belong to fiber laser technology field.
Background technology
Accidental laser is based on a kind of laser fed back at random, and it utilizes the Multiple Scattering effect in Disordered Media real
Now random feedback.Laser output angle dependence and high threshold power etc. often be present in the three-dimensional random laser thus built
Shortcoming.Optical fiber has fabulous two dimension limitation, can effectively overcome Random Laser output angle dependence and threshold power high
Problem.At present, random fiber laser light feedback by optical fiber rayleigh backscattering obtain, due to rayleigh backscattering compared with
Weak, the laser has the shortcomings such as laser threshold power is high, conversion efficiency is low.Therefore, people are provided at random using phase-shifted grating
Light feeds back, but is limited by preparation technology, and the phase shift point quantity of phase-shifted grating typically only has several to dozens of, and its is random
Feedback characteristics is restricted.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of anti-based on directional scatter
The random fiber laser of feedback, the laser have the advantages such as simple in construction, threshold power is low.
The utility model is that the technical solution adopted for solving the technical problem is：
A kind of random fiber laser based on directional scatter feedback, including pump laser source (1), isolator (2), first
Wavelength division multiplexer (3), the first directional scatter (4), high germnium doped fiber (5), the second directional scatter (6), the second wavelength division multiplexer
(7)；Described pump laser source (1) is connected with isolator (2) one end, the other end and the first wavelength division multiplexer of isolator (2)
Two-port netwerk (101) is connected, and the port of the first wavelength division multiplexer three (102) is connected with the first directional scatter (4) one end, and first is random
The other end of grating (4) is connected with high germnium doped fiber (5) one end, the other end and the second directional scatter of high germnium doped fiber (5)
(6) one end is connected, and the other end of the second directional scatter (6) is connected with (103) port of the second wavelength division multiplexer (7), the second ripple
Pumping laser is isolated in (104) port of division multiplexer (7), and (105) port output of the second wavelength division multiplexer (7) is random to swash
Light, Random Laser can also export from (100) port of the first wavelength division multiplexer (3)；Described the first directional scatter (4) and
Two directional scatters (6) form random light feedback, laser is formed vibration in a fiber, reduce threshold power.
The beneficial effects of the utility model are：
Utilize the high feedback of directional scatter and the high-gain of high germnium doped fiber so that the threshold power of random fiber laser
Significantly reduce, improve Random Laser output characteristics.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the utility model is described in further detail.
Fig. 1 is a kind of random fiber laser structural representation based on directional scatter feedback of the utility model；
1 is pump laser source；2 be isolator；3 be the first wavelength division multiplexer；4 be the first directional scatter；5 be highly doped germanium
Optical fiber；6 be the second directional scatter；7 be the second wavelength division multiplexer；100 be the first wavelength division multiplexer Single port；101 be first wave
Division multiplexer Two-port netwerk；102 be the port of the first wavelength division multiplexer three；103 be the second wavelength division multiplexer Single port；104 be second
Wavelength division multiplexer Two-port netwerk；105 be the port of the second wavelength division multiplexer three.
Embodiment
Elaborated below in conjunction with structure of the present utility model and operation principle：
In figure, a kind of random fiber laser based on directional scatter feedback, including pump laser source (1), isolator
(2), the first wavelength division multiplexer (3), the first directional scatter (4), high germnium doped fiber (5), the second directional scatter (6), the second wavelength-division
Multiplexer (7)；Described pump laser source (1) is connected with isolator (2) one end, the other end of isolator (2) and the first wavelength-division
Multiplexer Two-port netwerk (101) is connected, and the port of the first wavelength division multiplexer three (102) is connected with the first directional scatter (4) one end, and first
The other end of directional scatter (4) is connected with high germnium doped fiber (5) one end, the other end and the second random light of high germnium doped fiber (5)
Grid (6) one end is connected, and the other end of the second directional scatter (6) is connected with (103) port of the second wavelength division multiplexer (7), and second
Pumping laser is isolated in (104) port of wavelength division multiplexer (7), and (105) port output of the second wavelength division multiplexer (7) is random
Laser, Random Laser can also export from (100) port of the first wavelength division multiplexer (3)；Described the first directional scatter (4)
Random light feedback is formed with the second directional scatter (6), laser is formed vibration in a fiber, reduces threshold power.
A kind of random fiber laser operation principle based on directional scatter feedback：
A kind of each part of random fiber laser based on directional scatter feedback according to Fig. 1 connects, and pumping swashs
The laser of light source 1 enters the first wavelength division multiplexer 3 by isolator 2, enters high germnium doped fiber by the first directional scatter 4,
In the presence of stimulated raman scattering, optical wavelength to long wavelength change, when pumping light power is sufficiently strong, produce single order by
Swash Raman diffused light.Single order stimulated Raman scattering light is reflected by the second directional scatter, and random in the first directional scatter and second
Laser generation is formed between grating.105 ports and first wavelength division multiplexer 3 of the stable Random Laser by the second wavelength division multiplexer 7
100 ports output.Change the pump wavelength of pump laser source and the centre wavelength of directional scatter, Output of laser wavelength is therewith
Change.
Embodiment
Figure is a kind of structural representation of the random fiber laser based on directional scatter feedback of the utility model.Wherein
One directional scatter 4 and the second directional scatter 6 are inscribed by single-mode fiber, length 1cm, reflectivity 90%, and centre wavelength is
2.125μm.The optical maser wavelength of pump laser source 1 is 1.95 μm, the first wavelength division multiplexer 3 and the operation wavelength of the second wavelength division multiplexer 7
For 1.95 μm/2.125 μm, the high length of germnium doped fiber 5 is 2m, germania concentration 98mol.%.Pump laser source 1 and isolator 2
One end is connected, and the other end of isolator 2 is connected with the first wavelength division multiplexer Two-port netwerk 101, the port 102 of the first wavelength division multiplexer three
It is connected with the one end of the first directional scatter 4, the other end of the first directional scatter 4 is connected with high one end of germnium doped fiber 5, highly doped germanium light
The other end of fibre 5 is connected with the one end of the second directional scatter 6, the other end of the second directional scatter 6 and the second wavelength division multiplexer 103
Port is connected, and pumping laser is isolated in the port of the second wavelength division multiplexer 104, the 105 ports output of the second wavelength division multiplexer 7 with
Machine laser, while Random Laser can also export from the port of the first wavelength division multiplexer 100.
1.95 μm of pump lights that pump laser source 1 is sent are coupled in light path by the first wavelength division multiplexer Single port 101,
Pass through the stimulated Raman scattering light that excited Raman effect produces 2.125 μm or so in high germnium doped fiber 5, in the first directional scatter
4 and second produce random feedback between directional scatter 6, and feedback optical wavelength is 2.125 μm.When the pump power of pump laser source 1
When sufficiently high, caused stimulated Raman scattering light feeds back between the first directional scatter 4 and the second directional scatter 6, and feedback light exists
Vibrated back and forth between first directional scatter 4 and the second directional scatter 6, the Random Laser part finally obtained passes through the second wavelength-division
The port of multiplexer 105 is exported, and another part Random Laser is exported by the port of the first wavelength division multiplexer 100.
Above example is one of preferred scheme in all schemes of the utility model, other to be based on directional scatter to one kind
The simple change of the random fiber laser of feedback belongs to the scope that the utility model is protected.
Claims (1)
1. a kind of random fiber laser based on directional scatter feedback, including pump laser source (1), isolator (2), first wave
Division multiplexer (3), the first directional scatter (4), high germnium doped fiber (5), the second directional scatter (6), the second wavelength division multiplexer (7)；
Described pump laser source (1) is connected with isolator (2) one end, the other end of isolator (2) and the end of the first wavelength division multiplexer two
Mouth (101) is connected, and the port of the first wavelength division multiplexer three (102) is connected with the first directional scatter (4) one end, the first directional scatter
(4) the other end is connected with high germnium doped fiber (5) one end, the other end of high germnium doped fiber (5) and the second directional scatter (6) one end
It is connected, the other end of the second directional scatter (6) is connected with (103) port of the second wavelength division multiplexer (7), the second wavelength division multiplexer
(7) pumping laser is isolated in (104) port, and (105) port output Random Laser of the second wavelength division multiplexer (7) is random to swash
Light can also export from (100) port of the first wavelength division multiplexer (3)；Described the first directional scatter (4) and the second random light
Grid (6) form random light feedback, laser is formed vibration in a fiber, reduce threshold power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720776590.6U CN206947722U (en) | 2017-06-26 | 2017-06-26 | A kind of random fiber laser based on directional scatter feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720776590.6U CN206947722U (en) | 2017-06-26 | 2017-06-26 | A kind of random fiber laser based on directional scatter feedback |
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| Publication Number | Publication Date |
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| CN206947722U true CN206947722U (en) | 2018-01-30 |
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| CN201720776590.6U Expired - Fee Related CN206947722U (en) | 2017-06-26 | 2017-06-26 | A kind of random fiber laser based on directional scatter feedback |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048296A (en) * | 2019-05-24 | 2019-07-23 | 中国计量大学 | A kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback |
| CN110411553A (en) * | 2019-08-15 | 2019-11-05 | 上海波汇科技有限公司 | Distribution type fiber-optic acoustic wave sensing system based on directional scatter |
| CN113097845A (en) * | 2021-04-02 | 2021-07-09 | 广东工业大学 | Low-noise Brillouin random fiber laser |
| CN113346340A (en) * | 2021-05-12 | 2021-09-03 | 华中科技大学 | Single-frequency random DBR fiber laser based on fiber random grating |
-
2017
- 2017-06-26 CN CN201720776590.6U patent/CN206947722U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048296A (en) * | 2019-05-24 | 2019-07-23 | 中国计量大学 | A kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback |
| CN110411553A (en) * | 2019-08-15 | 2019-11-05 | 上海波汇科技有限公司 | Distribution type fiber-optic acoustic wave sensing system based on directional scatter |
| CN113097845A (en) * | 2021-04-02 | 2021-07-09 | 广东工业大学 | Low-noise Brillouin random fiber laser |
| CN113346340A (en) * | 2021-05-12 | 2021-09-03 | 华中科技大学 | Single-frequency random DBR fiber laser based on fiber random grating |
| CN113346340B (en) * | 2021-05-12 | 2022-05-20 | 华中科技大学 | Single-frequency random DBR fiber laser based on fiber random grating |
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