CN105406331A - Tellurate fibre-based raman fibre laser device with mid-infrared band of over 5 microns - Google Patents
Tellurate fibre-based raman fibre laser device with mid-infrared band of over 5 microns Download PDFInfo
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- CN105406331A CN105406331A CN201510933321.1A CN201510933321A CN105406331A CN 105406331 A CN105406331 A CN 105406331A CN 201510933321 A CN201510933321 A CN 201510933321A CN 105406331 A CN105406331 A CN 105406331A
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- fiber
- raman
- stokes signal
- reflection
- tellurate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
Abstract
The invention discloses a tellurate fibre-based raman fibre laser device with a mid-infrared band of over 5 microns. The raman fibre laser device is characterized by comprising a tellurate fibre, wherein fibre bragg grating pairs for reflecting a first-order raman stokes signal and a second-order raman stokes signal are etched in regions close to two ends of the tellurate fibre; one end of the tellurate fibre is connected with a high-power erbium-doped fluoride fibre laser device; and output light of the high-power erbium-doped fluoride fibre laser device enters the tellurate fibre through an optical coupling system. The tellurate fibre disclosed by the invention has a large raman frequency shift and a large raman gain bandwidth; mid-infrared laser of which the output wavelength exceeds 5 microns is generated through first-order stimulated raman scattering and second-order stimulated raman scattering of the fibre; and a laser output of which the output wavelength exceeds 10 microns can be obtained through further expansion.
Description
Technical field
The invention belongs to fiber laser field, particularly the Raman fiber lasers of a kind of output wavelength infrared 5 mu m wavebands in exceeding.
Background technology
Fiber laser has that threshold value is low, conversion efficiency is high, good beam quality, thermal diffusivity are good and compact conformation is easy to the advantage such as integrated.Current fiber laser develops wave band the most ripe and is positioned at 1.06 and 1.55 mu m wavebands, and main utilization mixes ytterbium (Yb
3+) and er-doped (Er
3+) rare earth luminescence.Wherein 1.06 mu m wavebands are due to the use of high concentration ytterbium doped fiber, can obtain high-power output; 1.55 mu m wavebands can be used for optical fiber telecommunications system.
In recent years, the development of middle-infrared band fiber laser rapidly.Its reason is that middle-infrared band laser has broad application prospects, such as, for the aspect such as laser microsurgery operation, environment Trace gas detection, Laser Micro-Machining and middle infrared spectroscopy.The laser of current generation middle-infrared band mainly contains hetero junction laser diode, quantum cascade laser, the generation of laser difference frequency signal system, optical parametric oscillator and crystalline material laser etc.It is lower that these methods produce lasing efficiency, and system configuration is complicated, is difficult to operation.How to obtain high power, high efficiency and structure simple in an infrared 3-8 μm Laser output become current research difficult point.
Due to thulium (Tm
3+), holmium (Ho
3+), erbium (Er
3+), dysprosium (Dy
3+) etc. rare earth ion in middle-infrared band, there is emission band, utilize it to mix optical fiber as gain media composition middle-infrared band laser, there is compact conformation and stability advantages of higher.But also there is several respects shortcoming: the acquisition of high-output power needs the rare earth ion doped of high concentration; The pumping wavelength of laser and emission wavelength depend on absorption and the emission characteristics of rare earth ion self.In addition, after wavelength is more than 4 μm, due to nonradiative transition dominate in optical fiber, be difficult to produce laser by rare earth ion radiates transition.Therefore utilize rare earth luminescence, usually can only obtain the mid-infrared laser of 2-4 mu m waveband.
Be compared to rare earth ion doped optical fiber laser, the output characteristic of Raman fiber lasers depends on the Raman gain coefficienct of the power of pumping source, wavelength and optical fiber.Based on highly nonlinear optical fiber, by the change of pumping wavelength, stimulated Raman scattering can be produced at any wave band in theory.Therefore, Raman fiber lasers has huge potentiality in infrared laser aspect in the implementation.The gain media optical fiber that can be used as middle-infrared band stimulated Raman scattering mainly contains fluoride, sulfide and tellurate optical fiber, by cascade stimulated Raman scattering process, can obtain the laser of output wavelength more than 4 μm.Usual employing thulium-doped fiber laser pumping fluoride fiber, the output wavelength of thulium-doped fiber laser is positioned at 1.95-2 μm, and the Raman frequency shift of fluoride fiber is ~ 579cm
-1, need the wave band that just can be reached more than 4 μm by five rank stimulated Raman scatterings, whole laser system inefficiency, and structure is particularly complicated, cost very high and be difficult to realize.In addition, the Raman gain coefficienct of fluoride fiber is lower by (~ 4 × 10
-14m/W), obtain certain Raman gain, every single order stimulated Raman scattering process all needs longer fluoride fiber, usually needs several meter Nai Zhi tens of meters of optical fiber.Chalcogenide fiber has higher Raman gain coefficienct (As
2s
3optical fiber, ~ 6 × 10
-12m/W), but the Raman frequency shift (As of chalcogenide fiber
2s
3optical fiber, ~ 350cm
-1) and Raman gain bandwidth (As
2s
3optical fiber, ~ 50cm
-1) all less, so need more multistage stimulated Raman scattering process just can reach 4 μm.The optical fiber of above-mentioned bi-material, is all not suitable for the mid-infrared laser of generation 5 μm and more long-wave band.
Summary of the invention
The present invention solves the deficiency that middle infrared Raman fiber laser of the prior art exists, and proposes a kind of Raman fiber lasers based on infrared 5 mu m wavebands in the exceeding of tellurate optical fiber.
Technical solution problem of the present invention, adopts following technical scheme:
The present invention is based on the Raman fiber lasers of infrared 5 mu m wavebands in the exceeding of tellurate optical fiber, its feature is: comprise a tellurate optical fiber; The Fiber Bragg Grating FBG of reflection single order Raman Stokes signal is carved with to the Fiber Bragg Grating FBG pair with reflection second order Raman Stokes signal, the outside that the Fiber Bragg Grating FBG of described reflection second order Raman Stokes signal is right to the Fiber Bragg Grating FBG being positioned at described reflection single order Raman Stokes signal at described tellurate optical fiber two ends near zone;
The input of described tellurate optical fiber is connected with high power Erbium-Doped Fluoride compound fiber laser, and the output light of described high power Erbium-Doped Fluoride compound fiber laser enters tellurate optical fiber by optical coupling lens group; Being provided with at the output of described tellurate optical fiber can the long pass filter of saturating more than 5 μm, for the spectral component of filtering less than 5 μm, and the mid-infrared laser of last output wavelength more than 5 μm.
The typical component of described tellurate optical fiber is 76.5TeO
2-6Bi
2o
3-6ZnO-11.5Na
2o (mol%), has large Raman frequency shift (peak gain position), wide Raman gain bandwidth and high Raman gain coefficienct, and the frequency displacement of its Raman peak values gain level is ~ 750cm
-1, Raman gain bandwidth is ~ 300cm
-1, Raman gain coefficienct is ~ 4 × 10
-12m/W.
The Fiber Bragg Grating FBG of described reflection single order Raman Stokes signal, to the Fiber Bragg Grating FBG pair with described reflection second order Raman Stokes signal, is utilize 800nm femto-second laser to add phase mask technology to write direct on tellurate optical fiber; Because 800nm femtosecond laser can penetrate polymeric material, therefore need not remove optical fiber coating and to write direct grating.The reflection kernel wavelength that the Fiber Bragg Grating FBG of described reflection single order Raman Stokes signal is right corresponds to single order Raman Stokes signal wavelength; The reflection kernel wavelength that the Fiber Bragg Grating FBG of described reflection second order Raman Stokes signal is right corresponds to second order Raman Stokes signal wavelength.
The output wavelength of described high power Erbium-Doped Fluoride compound fiber laser is 2.9 μm, comprises 980nm pump laser, the fiber grating pair of reflection wavelength 2.9 μm and er-doped fluoride fiber.The tail optical fiber (silica fiber) of 980nm pump laser is connected by optical fiber fusion welding technology with er-doped fluoride fiber, is produced the laser of 2.9 μm by cladding pumping.The fiber grating pair that reflection wavelength is 2.9 μm is scribed on er-doped fluoride fiber, and one of them grating is as height anti-chamber mirror, and another grating is as output coupling cavity mirror.
Described optical coupling lens group is made up of two coupling non-spherical lenses, the focal length of be coupled non-spherical lens adjacent with er-doped fluoride fiber and the numerical aperture of er-doped fluoride fiber match, and the focal length of be coupled non-spherical lens adjacent with tellurate optical fiber and the numerical aperture of tellurate optical fiber match; Being inserted with between two coupling non-spherical lenses can the long pass filter of saturating 2.9 μm, for by the pump light of 2.9 μm, and the stray light of filtering short-wave band.
The above-mentioned Raman fiber lasers based on infrared 5 mu m wavebands in the exceeding of tellurate optical fiber, be not limited to second-order Raman scattering process, can also expand to higher Raman scattering processes, to obtain the Laser output of more long-wave band, such as: by three rank stimulated Raman scattering processes, select the fiber grating pair mated with it, the mid-infrared laser more than 8 μm can be produced, that is: the Fiber Bragg Grating FBG pair of reflection three rank Raman Stokes signal can also be carved with at described tellurate optical fiber two ends near zone, the outside that the Fiber Bragg Grating FBG of described reflection three rank Raman Stokes signal is right to the Fiber Bragg Grating FBG being positioned at described reflection second order Raman Stokes signal.The Fiber Bragg Grating FBG of described reflection three rank Raman Stokes signal is to being utilize 800nm femto-second laser to add phase mask technology to write direct on tellurate optical fiber; The reflection kernel wavelength that the Fiber Bragg Grating FBG of described reflection three rank Raman Stokes signal is right corresponds to three rank Raman Stokes signal wavelength.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention adopts the tellurate optical fiber with large Raman frequency shift, wide gain bandwidth, high Raman gain and high power ability to bear, below 1 meter length optical fiber in produce high power mid-infrared laser more than 5 μm and export, the complexity of whole laser system reduces, structure is more compact, and cost is lower.
2, in laser of the present invention, owing to only can produce the mid-infrared laser more than 5 μm by second order stimulated Raman radiation process, energy conversion efficiency greatly improves, and under identical pump power, its power output is also higher.
3, the present invention adopts 800nm femto-second laser to add phase mask technology directly at tellurate optical fiber Fiber Bragg Grating, forming resonant cavity, without the need to removing optical fiber coating, can improve the mechanical capacity of fiber grating, improves the reliability of laser system.
4, laser of the present invention is by the 3rd rank stimulated Raman scattering process, and Raman fiber lasers output wavelength can be made to extend to more than 8-10 μm.
Accompanying drawing explanation
Fig. 1 be the Raman fiber lasers that the present invention is based on infrared 5 mu m wavebands in the exceeding of tellurate optical fiber a kind of structural representation (have reflection single order, second order Raman Stokes signal Fiber Bragg Grating FBG to);
Fig. 2 is the single order of the present invention's tellurate optical fiber used, second order and three rank Raman frequency shift schematic diagrames;
Fig. 3 be the another kind of form being the Raman fiber lasers that the present invention is based on infrared 5 mu m wavebands in the exceeding of tellurate optical fiber structural representation (have reflection single order, second order, three rank Raman Stokes signal Fiber Bragg Grating FBG to);
Number in the figure: 1 is 980nm pump laser; 2 is the fiber grating pair of reflection wavelength 2.9 μm; 3 is er-doped fluoride fiber; 4 is optical coupling lens group; 5 is can the long pass filter of saturating 2.9 μm; 6 is tellurate optical fiber; 7 for reflecting the Fiber Bragg Grating FBG pair of single order Raman Stokes signal; 8 for reflecting the Fiber Bragg Grating FBG pair of second order Raman Stokes signal; 9 is can the long pass filter of saturating more than 5 μm; 10 is the Fiber Bragg Grating FBG pair of reflection three rank Raman Stokes signal.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described further.
As shown in Figure 1, the present embodiment based on the Raman fiber lasers of infrared 5 mu m wavebands in the exceeding of tellurate optical fiber, comprise successively 980nm pump laser 1, the fiber grating pair 2 of reflection wavelength 2.9 μm, er-doped fluoride fiber 3, optical coupling lens group 4, can saturating 2.9 μm long pass filter 5, tellurate optical fiber 6, reflection single order Raman Stokes signal Fiber Bragg Grating FBG to 7, the Fiber Bragg Grating FBG of reflection second order Raman Stokes signal is to 8 and can the long pass filter 9 of saturating more than 5 μm.
Wherein: 980nm pump laser 1 has continuously and pulse two kinds of way of outputs, controls by modulated pumping electric current.In continuous pumping situation, high average power (~ 10W) can be obtained; In pulse pump situation (20-50Hz, duty ratio 10-20%, output pulse width 2-10ms), high peak power (~ 30W) can be obtained, and reduce thermal effect.Above-mentioned two kinds of way of outputs can be selected according to practical application request.
The Fiber Bragg Grating FBG of Fiber Bragg Grating FBG to 7 and reflection second order Raman Stokes signal of the fiber grating pair 2 that reflection wavelength is 2.9 μm, reflection single order Raman Stokes signal all adopts 800nm femto-second laser to add the inscription of phase mask technology to 8, adopt different phase masks respectively, 800nm femtosecond laser directly penetrates optical fiber coating and writes grating at fibre core, without the need to removing coat, the mechanical capacity of optical fiber and grating can be strengthened.
The fiber grating pair 2 that reflection wavelength is 2.9 μm: one of them grating, as input cavity mirror, utilizes chirp phase template to write, having wide reflection bandwidth (~ 5nm), is ~ 99% to the light reflectivities of 2.9 μm; Another utilizes uniform phase mask to write as output cavity mirror, and bandwidth narrower (~ 1nm), it may be selected to be 50-70% to the light reflectivity of 2.9 μm.
The Fiber Bragg Grating FBG of reflection single order Raman Stokes signal all utilizes chirp phase template to write to 7: two gratings, there is wide reflection bandwidth (~ 10nm), and to the reflectivity of 3.71 μm be greater than ~ 95%, width reflection belt is wide is conducive to the intensity improving inner chamber single order Raman Stokes signal, for the generation of second order Raman Stokes signal provides higher pump power with high reflectance.
The Fiber Bragg Grating FBG of reflection second order Raman Stokes signal is to 8: one of them grating is as input cavity mirror, chirp phase template is utilized to write, there is ~ the reflection bandwidth of 10nm near 5.13 μm, and reflectivity be greater than ~ 95%, wide bandwidth is convenient to mate with output grating cavity mirror wave appearance; Another grating, as output cavity mirror, utilizes uniform phase mask to write, and near 5.13 μm, have ~ the reflection bandwidth of 1nm, reflectivity is selected according to the needs of power output, can be ~ 70-90%.
The stimulated radiation spectrum center of er-doped fluoride fiber 3 covers 2.8-2.9 μm, and erbium ion-doped concentration is ~ 6-8mol.%, fiber lengths ~ 6 meter.Utilize the laser starting of oscillation that the fiber grating pair 2 of reflection wavelength 2.9 μm can make 2.9 μm to locate, other wavelength is suppressed.
The fiber grating pair 2 of the 980nm pump laser 1 in Fig. 1, reflection wavelength 2.9 μm and er-doped fluoride fiber 3 form high power Erbium-Doped Fluoride compound fiber laser, and output wavelength 2.9 μm, as raman pump source.It exports light and enters tellurate optical fiber 6 by optical coupling lens group 4.Optical coupling lens group 4 is made up of two non-spherical lenses, and its focal length is selected to match with the numerical aperture of er-doped fluoride fiber 3 and tellurate optical fiber 6 respectively.Inserting in the middle of optical coupling lens group 4 can the long pass filter 5 of saturating 2.9 μm, the spectral component that filtering is less than 2.9 μm, reduces the noise jamming of single order to generation and second order Raman stokes light.
Tellurate optical fiber 6 has step index structure, and preparing optical fiber tellurate glass typical component used is 76.5TeO
2-6Bi
2o
3-6ZnO-11.5Na
2o (mol%), core size is ~ 10 μm, and cladding diameter is ~ 140 μm, and after adding coat, diameter is ~ 300 μm, and optical fiber total length is between 0.8-1m.It is ~ 750cm that tellurate optical fiber 6 has Raman frequency shift
-1(peak gain position), Raman gain bandwidth is ~ 300cm
-1, Raman gain coefficienct is ~ 4 × 10
-12m/W.
Figure 2 shows that the single order of the tellurate optical fiber 6 that the present invention is used, second order and three rank Raman frequency shift schematic diagrames.After the raman pump light 10 that wavelength is 2.9 μm enters tellurate optical fiber 6 by optical coupling lens group 4, produce 3.71 μm of single order Raman Stokes signal light 11.Single order Raman Stokes signal light 11 by the Fiber Bragg Grating FBG of tellurate optical fiber 6 and reflection single order Raman Stokes signal to 7 effect, high-gain is obtained at chamber interior resonance, further generation 5.13 μm of second order Raman Stokes signal light 12, then amplify 8 through the Fiber Bragg Grating FBG of tellurate optical fiber 6 and reflection second order Raman Stokes signal and export after resonance.Select the pump light of 2.9 μm, the 3.71 μm of single order Raman Stokes signal light 11 produced and 5.13 μm of second order Raman Stokes signal light 12, just in time avoid the OH absworption peak of tellurate optical fiber near 3.3 μm and 4.3 μm, reduce the loss of optical fiber greatly, make single order and second order Raman resonance become possibility.Because the pump light producing second order Raman Stokes signal light 12 is lower than single order Raman Stokes signal light 11, so in Fig. 1 the fiber lengths of second order Raman Stokes signal light 12 process be a bit larger tham single order Raman Stokes signal light 11 (Fiber Bragg Grating FBG of reflection second order Raman Stokes signal to 8 Fiber Bragg Grating FBGs being positioned at reflection single order Raman Stokes signal to 7 outside), to reduce threshold value and to obtain higher gain.
The present invention is based on the Raman fiber lasers of infrared 5 mu m wavebands in the exceeding of tellurate optical fiber, its output wavelength is not limited to 5.13 μm.Because tellurate optical fiber has ~ 300cm
-1raman gain bandwidth, by selecting the reflection wavelength position of reflection single order Raman Stokes signal fiber grating pair 7, can near 3.71 μm ~ 400nm (~ 3.51-3.93 μm) scope produces single order Raman signal light; Corresponding this ~ the single order Raman signal light change of 400nm scope, the second order Raman signal light that wavelength location excursion is ~ 800nm (~ 4.76-5.57 μm) can be obtained; Due to tellurate optical fiber ~ 300cm
-1raman gain bandwidth, second order Raman signal light changeable wave-length coverage near 4.76 μm and 5.57 μm is respectively 4.44-5.13 μm and 5.14-6.08 μm.Therefore by select the Fiber Bragg Grating FBG of suitable reflection single order Raman Stokes signal to 7 and the Fiber Bragg Grating FBG of reflection second order Raman Stokes signal to 8, single order Raman can be obtained and cover the Laser output that 3.51-3.93 μm and second order Raman cover 4.44-6.08 μm.
As shown in Figure 3, the present invention is based on the Raman fiber lasers of infrared 5 mu m wavebands in the exceeding of tellurate optical fiber, its output wavelength can also be expanded further.Disappear deimpurity inhalation effects in the preparation process of tellurate optical fiber, increase the Fiber Bragg Grating FBG of reflection three rank Raman Stokes signal to 10, utilize three rank stimulated Raman scattering processes, output wavelength can be expanded to more than 8 μm, namely single order Raman Stokes signal light 11 is positioned at 3.71 μm, second order Raman Stokes signal light 12 is positioned at 5.13 μm, and three rank Raman Stokes signal light 13 are positioned at 8.34 μm.According to tellurate optical fiber ~ 300cm
-1raman gain bandwidth, three rank Raman Stokes signal can be expanded towards the wave band of more than 10 μm.
The present invention is based on the Raman fiber lasers of infrared 5 mu m wavebands in the exceeding of tellurate optical fiber, in can realizing, the raman laser of infrared 5-10 mu m waveband exports.
Claims (7)
1., based on a Raman fiber lasers for infrared 5 mu m wavebands in the exceeding of tellurate optical fiber, it is characterized in that: comprise a tellurate optical fiber (6); The Fiber Bragg Grating FBG being carved with reflection single order Raman Stokes signal at described tellurate optical fiber two ends near zone to (7) and reflect second order Raman Stokes signal Fiber Bragg Grating FBG to (8), the Fiber Bragg Grating FBG of described reflection second order Raman Stokes signal is positioned at the Fiber Bragg Grating FBG of described reflection single order Raman Stokes signal to the outside of (7) to (8);
The input of described tellurate optical fiber is connected with high power Erbium-Doped Fluoride compound fiber laser, and the output light of described high power Erbium-Doped Fluoride compound fiber laser enters tellurate optical fiber (6) by optical coupling lens group (4); Being provided with at the output of described tellurate optical fiber can the long pass filter (9) of saturating more than 5 μm.
2. Raman fiber lasers according to claim 1, it is characterized in that: the output wavelength of described high power Erbium-Doped Fluoride compound fiber laser is 2.9 μm, comprise 980nm pump laser (1), the fiber grating pair (2) of reflection wavelength 2.9 μm and er-doped fluoride fiber (3), the fiber grating pair (2) of described reflection wavelength 2.9 μm is scribed on described er-doped fluoride fiber (3).
3. Raman fiber lasers according to claim 2, it is characterized in that: described optical coupling lens group (4) is made up of two coupling non-spherical lenses, the focal length of be coupled non-spherical lens adjacent with described er-doped fluoride fiber (3) and the numerical aperture of er-doped fluoride fiber (3) match, and the focal length of be coupled non-spherical lens adjacent with described tellurate optical fiber (6) and the numerical aperture of tellurate optical fiber (6) match;
Being inserted with between two coupling non-spherical lenses can the long pass filter (5) of saturating 2.9 μm.
4. Raman fiber lasers according to claim 1 and 2, is characterized in that: the component of described tellurate optical fiber is 76.5TeO
2-6Bi
2o
3-6ZnO-11.5Na
2o (mol%).
5. Raman fiber lasers according to claim 1, it is characterized in that: the Fiber Bragg Grating FBG of described reflection single order Raman Stokes signal to (8), is utilize 800nm femto-second laser to add phase mask technology to write direct on tellurate optical fiber (6) to the Fiber Bragg Grating FBG of (7) and described reflection second order Raman Stokes signal;
The Fiber Bragg Grating FBG of described reflection single order Raman Stokes signal corresponds to single order Raman Stokes signal wavelength to the reflection kernel wavelength of (7);
The Fiber Bragg Grating FBG of described reflection second order Raman Stokes signal corresponds to second order Raman Stokes signal wavelength to the reflection kernel wavelength of (8).
6. Raman fiber lasers according to claim 1, it is characterized in that: be also carved with the Fiber Bragg Grating FBG of reflection three rank Raman Stokes signal to (10) at described tellurate optical fiber two ends near zone, the Fiber Bragg Grating FBG of described reflection three rank Raman Stokes signal is positioned at the Fiber Bragg Grating FBG of described reflection second order Raman Stokes signal to the outside of (8) to (10).
7. Raman fiber lasers according to claim 6, is characterized in that:
The Fiber Bragg Grating FBG of described reflection three rank Raman Stokes signal is to being utilize 800nm femto-second laser to add phase mask technology to write direct on tellurate optical fiber (6);
The reflection kernel wavelength that the Fiber Bragg Grating FBG of described reflection three rank Raman Stokes signal is right corresponds to three rank Raman Stokes signal wavelength.
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|---|---|---|---|
| CN201510933321.1A CN105406331A (en) | 2015-12-11 | 2015-12-11 | Tellurate fibre-based raman fibre laser device with mid-infrared band of over 5 microns |
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|---|---|---|---|
| CN201510933321.1A CN105406331A (en) | 2015-12-11 | 2015-12-11 | Tellurate fibre-based raman fibre laser device with mid-infrared band of over 5 microns |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720465A (en) * | 2016-04-20 | 2016-06-29 | 成都瀚辰光翼科技有限责任公司 | 4-8[mu]m-pulse Raman all-fiber laser |
| CN106374328A (en) * | 2016-11-18 | 2017-02-01 | 合肥工业大学 | Medium-infrared fiber laser system covering any wavelength in band between 2 and 10 microns based on soft glass fiber |
| CN107275917A (en) * | 2017-08-10 | 2017-10-20 | 电子科技大学 | Infrared super continuum source in ultra wide band all -fiber |
| CN107749557A (en) * | 2017-11-08 | 2018-03-02 | 合肥工业大学 | The middle tunable IR Fiber-optic parameter oscillator of high-order mode signal injection |
| CN108808434A (en) * | 2018-06-29 | 2018-11-13 | 电子科技大学 | High efficiency Raman pulse laser based on noise like pulse pump |
| CN112186481A (en) * | 2020-11-09 | 2021-01-05 | 四川光盛物联科技有限公司 | Narrow-band low-noise random fiber laser Raman pumping light source |
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2015
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720465A (en) * | 2016-04-20 | 2016-06-29 | 成都瀚辰光翼科技有限责任公司 | 4-8[mu]m-pulse Raman all-fiber laser |
| CN106374328A (en) * | 2016-11-18 | 2017-02-01 | 合肥工业大学 | Medium-infrared fiber laser system covering any wavelength in band between 2 and 10 microns based on soft glass fiber |
| CN106374328B (en) * | 2016-11-18 | 2019-04-05 | 合肥工业大学 | Mid-infrared fiber laser system based on the soft glass optical fiber covering any wavelength of 2-10 mu m waveband |
| CN107275917A (en) * | 2017-08-10 | 2017-10-20 | 电子科技大学 | Infrared super continuum source in ultra wide band all -fiber |
| CN107749557A (en) * | 2017-11-08 | 2018-03-02 | 合肥工业大学 | The middle tunable IR Fiber-optic parameter oscillator of high-order mode signal injection |
| CN107749557B (en) * | 2017-11-08 | 2019-08-30 | 合肥工业大学 | The middle tunable IR Fiber-optic parameter oscillator of high-order mode signal injection |
| CN108808434A (en) * | 2018-06-29 | 2018-11-13 | 电子科技大学 | High efficiency Raman pulse laser based on noise like pulse pump |
| CN113330737A (en) * | 2018-11-23 | 2021-08-31 | 努布鲁有限公司 | Multi-wavelength visible light laser light source |
| CN113330737B (en) * | 2018-11-23 | 2024-01-23 | 努布鲁有限公司 | Multi-wavelength visible light laser source |
| CN112186481A (en) * | 2020-11-09 | 2021-01-05 | 四川光盛物联科技有限公司 | Narrow-band low-noise random fiber laser Raman pumping light source |
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