CN203573000U - Mid-infrared fiber Bragg grating preparation device - Google Patents
Mid-infrared fiber Bragg grating preparation device Download PDFInfo
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- CN203573000U CN203573000U CN201320808501.3U CN201320808501U CN203573000U CN 203573000 U CN203573000 U CN 203573000U CN 201320808501 U CN201320808501 U CN 201320808501U CN 203573000 U CN203573000 U CN 203573000U
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- fiber
- bragg grating
- laser
- optical fiber
- infrared
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- 239000000835 fiber Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000013307 optical fiber Substances 0.000 claims abstract description 41
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 238000001228 spectrum Methods 0.000 claims abstract description 11
- 238000000985 reflectance spectrum Methods 0.000 claims description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 150000004770 chalcogenides Chemical class 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 102100029469 WD repeat and HMG-box DNA-binding protein 1 Human genes 0.000 claims description 3
- 101710097421 WD repeat and HMG-box DNA-binding protein 1 Proteins 0.000 claims description 3
- SCCCLDWUZODEKG-UHFFFAOYSA-N germanide Chemical compound [GeH3-] SCCCLDWUZODEKG-UHFFFAOYSA-N 0.000 claims description 3
- 230000007773 growth pattern Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- -1 rare earth ion Chemical class 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 229910052594 sapphire Inorganic materials 0.000 claims description 3
- 239000010980 sapphire Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 230000002269 spontaneous effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 206010034960 Photophobia Diseases 0.000 abstract 1
- 208000013469 light sensitivity Diseases 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
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Abstract
The utility model discloses a mid-infrared fiber Bragg grating preparation device. The mid-infrared fiber Bragg grating preparation device is characterized in that a femto second laser emits high-energy femto second laser, the femto second laser is collimated by a collimating lens, the size of the laser spot is adjusted by an aperture diaphragm, laser pulse energy is adjusted by a 1/2 wave-plate and a Glan prism, and then the laser is incident to a convex-plane cylindrical lens through a reflector, then the laser passes through a Bragg phase mask slice, and +1 grade diffracted light and -1 grade diffracted light are generated, the +1 grade diffracted light and the -1 grade diffracted light generate interference fringes in an overlapping region, an optical fiber is erected on a precision displacement platform, one end of the optical fiber is connected with a broadband light source, and the other end of the optical fiber is connected with a spectrum measuring instrument. A method for preparing a mid-infrared fiber Bragg grating is achieved, the optical system is simple, the method is provided with the advantages of traditional UV quasi molecule laser writing raster, the method has no requirements on the light sensitivity of the optical fiber, and the prepared fiber grating is provided with good temperature stability.
Description
Technical field
The present invention relates to a kind of fiber grating technology of preparing, especially a kind of based on infrared bragg grating preparation facilities in phase-mask method and femtosecond laser.
Background technology
Mid-infrared fiber laser can be widely used in the fields such as medical science, sensing, national defence.But be limited to middle infrared optical fiber grating, current mid-infrared fiber laser has all been used many such as optical lens mostly, the Free Space Optics devices (bulk optics) such as inverse mirror, cannot realize full fiberize, and this has limited the range of application of mid-infrared fiber laser greatly.Therefore, prepare high-quality middle infrared optical fiber grating and there is important value.
High-energy fly secondary laser relies on superelevation peak power and ultrafast action time, while acting on material, by multiphoton ionization, causes densification, causes the part of insulating material after light blast to be melted and rapid quenching, changes the refractive index of material.Therefore high-energy fly secondary laser can act on glass optical fiber, and the refractive index of glass optical fiber fibre core is carried out to periodic modulation, realizes grating effect.
We propose a kind of method and apparatus of preparing middle infrared optical fiber grating based on femtosecond laser and phase masks, during the middle infrared optical fiber Bragg grating of inscribing out can be applicable to, the development of infrared full-optical-fiber laser, also can be used for the development of mid-infrared light fiber grating sensor.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of based on infrared bragg grating preparation facilities in phase-mask method and femtosecond laser.
The present invention can be achieved through the following technical solutions.
Infrared bragg grating preparation facilities in a kind of, it is characterized in that by femto-second laser 1, collimation lens 2, aperture 3, 1/2 wave plate 4, Glan prism 5, catoptron 6, plano-convex post lens 7, Prague phase mask plate 8, optical fiber 9, precision displacement platform 10, wideband light source 11, optical spectrum instrumentation 12 forms, femto-second laser 1 sends high-octane femtosecond laser, through collimation lens 2 collimations, and adjust laser facula size by aperture 3, through 1/2 wave plate 4 and Glan prism 5, regulate pulsed laser energy, by catoptron 6, incide on plano-convex post lens 7, through Prague phase mask plate 8, produce again
order diffraction light, + 1 grade produces interference fringe with-1 order diffraction light in overlapping region, optical fiber 9 is erected on precision displacement platform 10, by precision displacement platform, adjust fiber position, make overlapping region that above-mentioned+1 grade and-1 order diffraction light interferes on fiber core, thereby the variation that interference fringe can induction optical fiber fiber core refractive index generating period, form optical fiber Bragg fiber grating, in online preparation process, optical fiber one end connects wideband light source 11, the other end connects optical spectrum instrumentation 12, observes the real-time growth pattern of optical grating reflection rate by transmitted spectrum.
Femto-second laser 1 of the present invention is titanium-doped sapphire femtosecond laser regenerative amplifier, and operation wavelength is 800nm, and repetition frequency is 1KHz, and maximum impulse energy is 2.2mJ;
Of the present inventionly write the middle-infrared band that the bragg grating reflectance spectrum centre wavelength of making is positioned at 2-5 μ m, determined by cycle of Prague phase mask plate, specific as follows: λ
b=2n
effΛ
g; Λ
g=Λ
pM/ 2; Wherein, λ
bfor bragg grating reflectance spectrum centre wavelength, n
efffiber core effective refractive index, Λ
gfor bragg grating index modulation cycle, Λ
pMfor the phase mask plate cycle.
Optical fiber 9 of the present invention can be silica fibre (Silicon Fiber), or fluoride fiber (Fluoride Fiber), or germanide (Germanate Fiber), or chalcogenide fiber (Chalcogenide Fiber).
Optical fiber 9 of the present invention can be passive fiber, can be also the adulterated Active Optical Fiber of rare earth ion of fibre core.
Optical fiber 9 of the present invention can be single cladded-fiber, can be also doubly clad optical fiber.
The advantages such as the present invention has simple in structure, easy operating, in preparation infrared bragg grating temperature stability good, be difficult for being wiped free of infrared full-optical-fiber laser in can be applicable to, the development of mid-infrared light fiber grating sensor.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Mark in figure: femto-second laser 1, collimation lens 2, aperture 3,1/2 wave plates 4, Glan prism 5, catoptron 6, plano-convex post lens 7, Prague phase mask plate 8, optical fiber 9, precision displacement platform 10, wideband light source 11, optical spectrum instrumentation 12.
Embodiment
The invention will be further described by reference to the accompanying drawings:
As shown in Figure 1, infrared bragg grating (FBG) preparation facilities in a kind of, comprise femto-second laser 1, collimation lens 2, aperture 3, 1/2 wave plate 4, Glan prism 5, catoptron 6, plano-convex post lens 7, Prague phase mask plate 8, optical fiber 9, precision displacement platform 10, wideband light source 11, optical spectrum instrumentation 12, it is characterized in that femto-second laser 1 sends high-octane femtosecond laser, through collimation lens 2 collimations, and adjust laser facula size by aperture 3, through 1/2 wave plate 4 and Glan prism 5, regulate pulsed laser energy, by catoptron 6, incide on plano-convex post lens 7, through Prague phase mask plate 8, produce again
order diffraction light, + 1 grade produces interference fringe with-1 order diffraction light in overlapping region, optical fiber 9 is erected on precision displacement platform 10, by precision displacement platform, adjust fiber position, make overlapping region that above-mentioned+1 grade and-1 order diffraction light interferes on fiber core, thereby the variation that interference fringe can induction optical fiber fiber core refractive index generating period, forms optical fiber Bragg fiber grating.In online preparation process, optical fiber one end connects wideband light source 11, and the other end connects optical spectrum instrumentation 12, observes the real-time growth pattern of optical grating reflection rate by transmitted spectrum.
Described femto-second laser 1 is titanium-doped sapphire femtosecond laser regenerative amplifier, and operation wavelength is 800nm, and repetition frequency is 1KHz, and maximum impulse energy is 2.2mJ;
Described write the middle-infrared band that the bragg grating reflectance spectrum centre wavelength of making is positioned at 2-5 μ m, determined by cycle of Prague phase mask plate.Specific as follows: λ
b=2n
effΛ
g; Λ
g=Λ
pM/ 2; Wherein, λ
bfor bragg grating reflectance spectrum centre wavelength, n
efffiber core effective refractive index, Λ
gfor bragg grating index modulation cycle, Λ
pMfor the phase mask plate cycle;
Described optical fiber 9 can be silica fibre (Silicon Fiber), or fluoride fiber (Fluoride Fiber), or germanide (Germanate Fiber), or chalcogenide fiber (Chalcogenide Fiber); Can be passive fiber, can be also the adulterated Active Optical Fiber of rare earth ion of fibre core; Can be single cladded-fiber, can be also doubly clad optical fiber;
Described wideband light source 11 can be based on spontaneous radiation, to amplify the wideband light source of (ASE), can be also the wideband light source based on super continuous (Supercontinuum Generation) effect.Wideband light source has covered the centre wavelength of the Fiber Bragg Grating FBG of the system of writing.
Claims (8)
1. infrared bragg grating preparation facilities in a kind, comprise femto-second laser, collimation lens, aperture, 1/2 wave plate, Glan prism, catoptron, plano-convex post lens, Prague phase mask plate, optical fiber, precision displacement platform, wideband light source, optical spectrum instrumentation, it is characterized in that femto-second laser sends high-octane femtosecond laser, through collimation lens collimation, and adjust laser facula size by aperture, through 1/2 wave plate and Glan prism, regulate pulsed laser energy, by catoptron, incide on plano-convex post lens, through Prague phase mask plate, produce again
order diffraction light, + 1 grade produces interference fringe with-1 order diffraction light in overlapping region, optical fibre frame is located on precision displacement platform, by precision displacement platform, adjust fiber position, make overlapping region that above-mentioned+1 grade and-1 order diffraction light interferes on fiber core, the variation of interference fringe induction optical fiber fiber core refractive index generating period, form optical fiber Bragg fiber grating, in online preparation process, optical fiber one end connects wideband light source, the other end connects optical spectrum instrumentation, observes the real-time growth pattern of optical grating reflection rate by transmitted spectrum.
According to claim 1 a kind of in infrared bragg grating preparation facilities, it is characterized in that femto-second laser 1 is for titanium-doped sapphire femtosecond laser regenerative amplifier, operation wavelength is 800nm, repetition frequency is 1KHz, maximum impulse energy is 2.2mJ.
According to claim 1 a kind of in infrared bragg grating preparation facilities, it is characterized in that writing the middle-infrared band that the bragg grating reflectance spectrum centre wavelength of making is positioned at 2-5 μ m.
According to claim 1 a kind of in infrared bragg grating preparation facilities, it is characterized in that writing the bragg grating reflectance spectrum centre wavelength of making and determined by cycle of Prague phase mask plate: λ
b=2n
effΛ
g; Λ
g=Λ
pM/ 2; Wherein, λ
bfor bragg grating reflectance spectrum centre wavelength, n
efffiber core effective refractive index, Λ
gfor bragg grating index modulation cycle, Λ
pMfor the phase mask plate cycle.
According to claim 1 a kind of in infrared bragg grating preparation facilities, it is characterized in that optical fiber is silica fibre (Silicon Fiber) or fluoride fiber (Fluoride Fiber) or germanide (Germanate Fiber) or chalcogenide fiber (Chalcogenide Fiber).
According to claim 1 a kind of in infrared bragg grating preparation facilities, it is characterized in that optical fiber is the adulterated Active Optical Fiber of rare earth ion of passive fiber or fibre core.
7. infrared bragg grating preparation facilities in a kind of according to claim 1, is characterized in that optical fiber is single cladded-fiber or doubly clad optical fiber.
According to claim 1 a kind of in infrared bragg grating preparation facilities, it is characterized in that wideband light source is based on spontaneous radiation, to amplify wideband light source or the wideband light source based on super continuous (Supercontinuum Generation) effect of (ASE), wideband light source has covered the centre wavelength of the Fiber Bragg Grating FBG of the system of writing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320808501.3U CN203573000U (en) | 2013-12-07 | 2013-12-07 | Mid-infrared fiber Bragg grating preparation device |
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| CN201320808501.3U CN203573000U (en) | 2013-12-07 | 2013-12-07 | Mid-infrared fiber Bragg grating preparation device |
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| CN203573000U true CN203573000U (en) | 2014-04-30 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616741A (en) * | 2013-12-07 | 2014-03-05 | 山东海富光子科技股份有限公司 | Device for preparing intermediate infrared fiber bragg grating |
| CN107783216A (en) * | 2017-10-24 | 2018-03-09 | 武汉锐科光纤激光技术股份有限公司 | A kind of device and method that Chirp gratings are made using Uniform Mask |
| CN107807443A (en) * | 2016-09-08 | 2018-03-16 | 南京理工大学 | The device and its method of adjustment of adjust automatically ultraviolet laser beams position |
| CN109828327A (en) * | 2016-10-20 | 2019-05-31 | 北京信息科技大学 | One kind inscribing any grid region length of fibre grating approach based on adjustable diaphragm |
| CN110879437A (en) * | 2019-11-29 | 2020-03-13 | 江苏师范大学 | Preparation device and preparation method of chalcogenide glass fiber Bragg grating |
| CN111221072A (en) * | 2020-03-30 | 2020-06-02 | 南京聚科光电技术有限公司 | Device and method for writing fiber grating by femtosecond laser |
-
2013
- 2013-12-07 CN CN201320808501.3U patent/CN203573000U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616741A (en) * | 2013-12-07 | 2014-03-05 | 山东海富光子科技股份有限公司 | Device for preparing intermediate infrared fiber bragg grating |
| CN107807443A (en) * | 2016-09-08 | 2018-03-16 | 南京理工大学 | The device and its method of adjustment of adjust automatically ultraviolet laser beams position |
| CN109828327A (en) * | 2016-10-20 | 2019-05-31 | 北京信息科技大学 | One kind inscribing any grid region length of fibre grating approach based on adjustable diaphragm |
| CN109828327B (en) * | 2016-10-20 | 2020-06-12 | 北京信息科技大学 | Method for writing fiber bragg grating with any grating area length based on adjustable diaphragm |
| CN107783216A (en) * | 2017-10-24 | 2018-03-09 | 武汉锐科光纤激光技术股份有限公司 | A kind of device and method that Chirp gratings are made using Uniform Mask |
| CN110879437A (en) * | 2019-11-29 | 2020-03-13 | 江苏师范大学 | Preparation device and preparation method of chalcogenide glass fiber Bragg grating |
| CN110879437B (en) * | 2019-11-29 | 2021-05-28 | 江苏师范大学 | Preparation device and preparation method of chalcogenide glass fiber Bragg grating |
| CN111221072A (en) * | 2020-03-30 | 2020-06-02 | 南京聚科光电技术有限公司 | Device and method for writing fiber grating by femtosecond laser |
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Denomination of utility model: Device for preparing intermediate infrared fiber bragg grating Effective date of registration: 20151016 Granted publication date: 20140430 Pledgee: Weihai commercial bank Limited by Share Ltd. Pledgor: HFB Photonics Co.,Ltd. Registration number: 2015990000870 |
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Date of cancellation: 20171107 Granted publication date: 20140430 Pledgee: Weihai commercial bank Limited by Share Ltd. Pledgor: HFB Photonics Co.,Ltd. Registration number: 2015990000870 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
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Denomination of utility model: Device for preparing intermediate infrared fiber bragg grating Effective date of registration: 20171107 Granted publication date: 20140430 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: HFB Photonics Co.,Ltd. Registration number: 2017990001036 |
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Date of cancellation: 20211014 Granted publication date: 20140430 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: HFB Photonics Co.,Ltd. Registration number: 2017990001036 |
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