CN209608084U - A kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback - Google Patents
A kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback Download PDFInfo
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- CN209608084U CN209608084U CN201920758227.0U CN201920758227U CN209608084U CN 209608084 U CN209608084 U CN 209608084U CN 201920758227 U CN201920758227 U CN 201920758227U CN 209608084 U CN209608084 U CN 209608084U
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Abstract
The utility model discloses a kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback, belong to fiber laser technology field, by LD pump laser source group, optical-fiber bundling device, optoisolator, fiber grating, the first high germnium doped fiber, the second high germnium doped fiber and is carved with the double clad of random phase shift grating and mixes Ho3+Fluoride fiber composition.The utility model mixes Ho in double clad3+Random phase shift grating is inscribed on fluoride fiber, passes through pumping source laser pump (ing), Ho3+Pump light is absorbed, stimulated radiation is generated, when reaching output laser threshold, generates Random Laser output；Pumping laser is vibrated back and forth by fiber grating reflection, can be effectively reduced Threshold pumped power, improves pumping efficiency, which has the characteristics that low threshold power, high conversion efficiency, compact-sized, all -fiber.
Description
Technical field
The utility model relates to a kind of random fiber laser, more particularly to one kind are anti-based on doped fluoride phase-shifted grating
3 μm of optical fiber lasers of feedback, belong to fiber laser technology field.
Background technique
Random fiber laser is a kind of Novel fiber laser, different from conventional laser, it is situated between using unordered gain
The multiple scattering of matter forms coherent light, does not have general resonant cavity, it does not have reflecting mirror in structure, and light is fed back through
Feedback is generated the resonance mode of specific frequency using the interference effect of scattering light, realizes Random Laser at random to realize in optical fiber
Output, lasing principle are based on random distribution Rayleigh scattering and Raman amplifiction effect.But formed feedback Rayleigh scattering compared with
Weak, this random fiber laser generally requires the optical fiber (tens kilometers) of long range, to meet gain media and feedback medium
Requirement in active length, and threshold power is high, transfer efficiency is low.Currently, Random Laser output wavelength just started from
1.0-1.5 μm of optical communications wavelength develops to 2 mum wavelengths, and in 3 mu m wavebands infrared random fiber laser there is presently no.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of this utility model provides a kind of based on based on random phase shift light
3 μm of optical fiber lasers of grid feedback, the laser have the spies such as low threshold power, high conversion efficiency, compact-sized, all -fiber
Point.
The technical solution that the utility model is taken in order to solve the technical problem are as follows:
A kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback, including LD pump laser source group (1),
Optical-fiber bundling device (2), optoisolator (3), the first high germnium doped fiber (4), double clad mix Ho3+Fluoride fiber (5), be scribed at it is double
Doped cladding layer Ho3+Random phase shift grating (6), the second high germnium doped fiber (7), fiber grating (8) on fluoride fiber (5)；It is described
LD pump laser source group (1) connect with one end of optical-fiber bundling device (2), optical-fiber bundling device (2) other end and optoisolator (3)
One end be connected, one end of the high germnium doped fiber (4) of optoisolator (3) other end first is connected, and the first high germnium doped fiber (4) is another
Ho is mixed with double clad in end3+One end of fluoride fiber (5) is connected, and double clad mixes Ho3+Fluoride fiber (5) other end and second
One end of high germnium doped fiber (7) is connected, and second high germnium doped fiber (7) other end is connect with fiber grating (8).Fiber grating (8)
Central wavelength is consistent with LD pump laser source group (1) optical maser wavelength, provides pump light reflection.Double clad mixes Ho3+Fluoride fiber
(5) the random phase shift grating (6) inscribed on provides random light feedback, and Random Laser is exported from fiber grating (8) other end, entirely
The left and right ends fiber end face of laser throws 8 ° of angles.
The utility model has the beneficial effects that
1, Ho is mixed using double clad3+Fluoride fiber and cladding pumping are adapted to high power pump light in a fiber
Transmission improves optical fiber and bears power；
2, Ho is mixed using in double clad3+Random phase shift grating is inscribed on fluoride fiber, and random feedback and light can be provided
Gain is learned, can be effectively reduced laser threshold power, improves laser output power, shortens fiber lengths required for light is fed back.
3, using fiber grating reflected pump light, pumping light utilization efficiency and transfer efficiency are improved, reduces pumping threshold；
4, using lower melting-point high germnium doped fiber, it can be used as and mix Ho3+Ho is mixed in the end cap of fluoride fiber, protection3+Fluorine
Compound optical fiber.
Detailed description of the invention
Fig. 1 is that a kind of structure of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback of the utility model is shown
It is intended to.
1 is LD pump laser source group, and 2 be optical-fiber bundling device；3 be optoisolator；4 be the first high germnium doped fiber；5 be double-contracting
Layer mixes Ho3+Fluoride fiber；6 be to be scribed at double clad to mix random phase shift grating on Ho3+ fluoride fiber 5；7 is high for second
Germnium doped fiber；8 be fiber grating.
Specific embodiment
It elaborates below in conjunction with the structure and working principle of the utility model:
In Fig. 1, a kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback, including LD pump laser source
Group 1, optical-fiber bundling device 2, optoisolator 3, the first high germnium doped fiber 4, double clad mix Ho3+Fluoride fiber 5 is scribed at double clad
Mix Ho3+Random phase shift grating 6, the second high germnium doped fiber 7, fiber grating 8 on fluoride fiber 5；The LD pumping laser
Source group 1 is connect with one end of optical-fiber bundling device 2, and 2 other end of optical-fiber bundling device is connected with one end of optoisolator 3, optoisolator 3
The other end is connected with one end of the first high germnium doped fiber 4, and first high 4 other end of germnium doped fiber and double clad mix Ho3+It is fluorinated object light
One end of fibre 5 is connected, and double clad mixes Ho3+5 other end of fluoride fiber is connected with one end of the second high germnium doped fiber 7, and second is high
7 other end of germnium doped fiber is connect with fiber grating 8.8 central wavelength of fiber grating and 1 optical maser wavelength one of LD pump laser source group
It causes, pump light reflection is provided.Double clad mixes Ho3+The random phase shift grating 6 inscribed on fluoride fiber 5 provides random light feedback,
Random Laser is exported from 8 other end of fiber grating.
A kind of working principle of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback:
A kind of each component connection according to figure 1 of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback
Good, the 1150nm pump light that LD pump laser source group 1 exports is coupled in linear optical path by optical-fiber bundling device 2, by optical isolation
Device 3 and the first high germnium doped fiber 4, mix Ho into double clad3+In fluoride fiber 5, the double clad for being carved with random phase shift grating 6 is mixed
Ho3+Simultaneously as the gain of light and random feedback medium, population occurs fluoride fiber 5 for holmium ion anti-by absorbing pump light
Turn, generates the random feedback of laser generation.The wavelength one of reflection of the fiber grating 8 as pump light, central wavelength and pump light
It causes, Threshold pumped power can be reduced, improve the utilization rate of pumping efficiency and pump light.When reaching Threshold pumped power, pump
Pu light mixes Ho by double clad3+Fluoride fiber 5 vibrates in random phase shift grating 6, carries out mode and frequency selection, finally
Random Laser is obtained to be exported by 8 other end of fiber grating.
Embodiment
Fig. 1 is that a kind of structure of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback of the utility model is shown
It is intended to.Wherein 1 optical maser wavelength of LD pump laser source group is 1150nm, and optical-fiber bundling device 2 is (6+1) × 1, and operation wavelength is
1150nm/2860nm, 3 central wavelength of optoisolator are 1150nm.First high germnium doped fiber 4 and the second high 7 concentration of germnium doped fiber
For 75wt.%, length 10cm.Double clad mixes Ho3+5 length of fluoride fiber is 2m, and random phase shift grating 6 is mixed in double clad
Ho3+It is inscribed on fluoride fiber 5, reflectivity is 50%~95%, length 5cm.Fiber grating 8 is inscribed by high germnium doped fiber, long
Degree is 2cm, and reflectivity is 95%~99%, central wavelength 1150nm.The one of LD pump laser source group 1 and optical-fiber bundling device 2
End connection, 2 other end of optical-fiber bundling device are connected with one end of optoisolator 3,3 other end of optoisolator and the first high germnium doped fiber
4 one end are connected, and first high 4 other end of germnium doped fiber and double clad mix Ho3+One end of fluoride fiber 5 is connected, and double clad mixes Ho3 +5 other end of fluoride fiber is connected with one end of the second high germnium doped fiber 7, second high 7 other end of germnium doped fiber and fiber grating
8 connections, final Random Laser are exported from 8 other end of fiber grating.
The 1150nm pump light that LD pump laser source group 1 exports is coupled in linear optical path by optical-fiber bundling device 2, by light
Isolator 3 and the first high germnium doped fiber 4, mix Ho into double clad3+In fluoride fiber 5, it is carved with the double-contracting of random phase shift grating 6
Layer mixes Ho3+Simultaneously as the gain of light and random feedback medium, by absorbing pump light particle occurs fluoride fiber 5 for holmium ion
Number reversion, generates the random feedback of laser generation.Reflection of the fiber grating 8 as pump light, the wave of central wavelength and pump light
It is long consistent, Threshold pumped power can be reduced, the utilization rate of pumping efficiency and pump light is improved.When reaching Threshold pumped power
When, pump light mixes Ho by double clad3+Fluoride fiber 5 vibrates in random phase shift grating 6, carries out mode and frequency selection,
The final central wavelength that obtains is exported for the Random Laser of 2860nm by 8 other end of fiber grating.
Above embodiments are one of preferred embodiment in all schemes of the utility model, and other pairs of one kind are based on doping fluorination
The simple change of 3 μm of optical fiber lasers of object phase-shifted grating feedback belongs to the range that the utility model is protected.
Claims (1)
1. a kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback, which is characterized in that including LD pumping laser
Source group (1), optical-fiber bundling device (2), optoisolator (3), the first high germnium doped fiber (4), double clad mix Ho3+Fluoride fiber (5),
It is scribed at double clad and mixes Ho3+Random phase shift grating (6), the second high germnium doped fiber (7), fiber grating on fluoride fiber (5)
(8)；The LD pump laser source group (1) is connect with one end of optical-fiber bundling device (2), optical-fiber bundling device (2) other end and light
Isolator (3) one end is connected, and high germnium doped fiber (4) one end of optoisolator (3) other end first is connected, the first high germnium doped fiber
(4) other end and double clad mix Ho3+One end of fluoride fiber (5) is connected, and double clad mixes Ho3+Fluoride fiber (5) other end
It is connected with one end of the second high germnium doped fiber (7), second high germnium doped fiber (7) other end is connect with fiber grating (8)；Optical fiber light
Grid (8) central wavelength is consistent with LD pump laser source group (1) optical maser wavelength, provides pump light reflection, and double clad mixes Ho3+Fluoride
The random phase shift grating (6) inscribed on optical fiber (5) provides random light feedback, and Random Laser is exported from fiber grating (8) other end,
The left and right ends fiber end face of entire laser throws 8 ° of angles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920758227.0U CN209608084U (en) | 2019-05-24 | 2019-05-24 | A kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920758227.0U CN209608084U (en) | 2019-05-24 | 2019-05-24 | A kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback |
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| CN201920758227.0U Expired - Fee Related CN209608084U (en) | 2019-05-24 | 2019-05-24 | A kind of 3 μm of optical fiber lasers based on doped fluoride phase-shifted grating feedback |
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Granted publication date: 20191108 Termination date: 20200524 |