CN103605180A - Etching device for spiral fiber grating fiber grating - Google Patents
Etching device for spiral fiber grating fiber grating Download PDFInfo
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- CN103605180A CN103605180A CN201310590046.9A CN201310590046A CN103605180A CN 103605180 A CN103605180 A CN 103605180A CN 201310590046 A CN201310590046 A CN 201310590046A CN 103605180 A CN103605180 A CN 103605180A
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Abstract
The invention discloses an etching device for a spiral fiber grating fiber grating. The etching device comprises a UV light source (101), a collimating focusing lens (102), a mask slice (103) and a motor control system, wherein the motor control system is mainly composed of a spiral motor and a forward motor. By using the etching device for the spiral fiber grating fiber grating, a Bragg type spiral fiber grating and a long-time spiral fiber grating can be etched, the etched spiral fiber grating can generate a vortex light beam and polarization control of the light beam. The etching device has the advantages of clear structure, high stability and simple manufacture.
Description
Technical field
The present invention relates to inscribe the technical field of fiber grating, particularly a kind of Written Device of Helical Fiber grating, the Helical Fiber grating that adopts the exposure of mask plate method one side to inscribe.
Background technology
The characteristic of vortex beams is that phase place has space non-uniform Distribution on beam cross-section, and light beam has carried certain orbital angular momentum and distributed, and its central point position has singularity mutually.This light beam can produce special field distribution under high numerical aperture lens focuses on, and in microstructure, controls with the field such as quantum communications and is widely used.Adopt one side exposure technique that optical fiber is inscribed into screw type grating, thereby in optical fiber, inspire vortex beams.
In addition along with the fast development of optical fiber communication and optical fiber sensing technology, people have proposed requirements at the higher level to function and the performance of full fiber type light modulator part, chiral optical fiber grating receives much concern because it has circular polarization selectivity characteristic, adopt one side exposure technique that optical fiber is inscribed to growth cycle screw type grating, thereby realize the Polarization Control to light beam.
The screw type grating great majority of report are the methods that adopts stress distortion both at home and abroad at present, and the spiral grating cycle of generation is mostly 10
-4magnitude, belongs to long period spiral grating, and short-period Prague spiral grating is difficult to realize.
Summary of the invention
The technical problem to be solved in the present invention is: in order to overcome defect described in background technology, the invention provides a kind of Written Device of Helical Fiber grating, its implementation is simple, and cost is lower.The present invention utilizes mask plate, adopt one side exposure technique on grating xsect, to produce asymmetrical lateral refraction rate modulation, one side exposure technique is in the ablation process of grating, the exponential function form that core region refractive index tapers off with the variation of inscribing the degree of depth, adopts this technology can make short-period Prague screw type grating.In addition, also can use amplitude type mask plate instead and inscribe long period screw type fiber grating.
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of Written Device of Helical Fiber grating, its structure is comprised of ultraviolet source, collimation focusing lens, mask plate, electric rotating machine and the motor that advances, the ultraviolet light that ultraviolet source produces, after collimation focusing lens, be irradiated on mask plate, when adopting phase mask plate inscription short period Prague spiral grating, transmitted light by phase mask plate after can produce ± 1 order diffraction, the interference light that diffraction light forms exposes to the optical fiber of being inscribed.When adopting amplitude type mask plate to inscribe long period spiral grating, on mask plate, directly expose in light transmission part on optical fiber.What inscribe employing is one side exposure technique, inscription has certain degree of depth, in the process of inscribing, electric rotating machine drives fiber spinning, electric rotating machine can rotate to both direction, the driven by motor of advancing optical fiber moves forward, regulate the cycle of two motors, make optical fiber when advancing one and inscribing periods lambda, fiber spinning one week, so just optical fiber can be inscribed into the screw type with certain depth, by the v speed that driven by motor optical fiber advances that represents to advance, ω represents that electric rotating machine rotarily drives the angular velocity size of fiber spinning, ∧ represents the cycle of the grating that will inscribe, relation between them is:
Further, described ultraviolet source is Argon ion laser or excimer laser.
Further, mask plate is the phase mask plate of inscribing bragg grating, or inscribes macrocyclic amplitude type mask plate.
Further, the optical fiber that the driven by motor of advancing is inscribed moves forward vertically, and electric rotating machine can drive the optical fiber of being inscribed around axial-rotation.
Principle of the present invention is: a kind of Written Device of Helical Fiber grating, comprising: ultraviolet source, collimation focusing lens, mask plate, electric machine control system form, and wherein electric machine control system mainly forms by entering motor in front of electric rotating machine.Conventional ultraviolet source has Argon ion laser, excimer laser etc.Phase mask plate used, after ultraviolet light sees through, can produce ± 1 order diffraction, and the interference fringe that diffraction light forms is exposed to the optical fiber of being inscribed, and makes fiber core refractive index produce cyclical variation and writes grating.When light beam is when inscribing long period spiral grating amplitude type mask plate used, optical fiber corresponding to light transmission part can expose, thereby in fibre core, forms permanent index modulation, and the optical fiber that lightproof part is corresponding does not change.Electric machine control system mainly contains two motors and forms: the motor that advances, electric rotating machine.Electric rotating machine drives optical fiber around axial-rotation, and it can realize the rotation of both direction, and the driven by motor of advancing optical fiber moves forward vertically, accurately controls the slewing rate of two motors, makes optical fiber when rotating a circle, and advances vertically a grating cycle.The conventional optical fiber of inscription fiber selection used, as single-mode fiber, multimode optical fiber, can be also the special fibers such as multilayer fibers.Ultraviolet lighting can form index modulation after being mapped to above.
The present invention's advantage is compared with prior art: the present invention utilizes mask plate, the method that adopts one side exposure to inscribe, both can inscribe long period Helical Fiber grating, also can inscribe short-period Prague Helical Fiber grating, can directly utilize mask plate inscription technology used at present, it is simple in structure, and principle is clear, cost is lower, easily realizes; Cycle can accurately be controlled, and stability is high.
Accompanying drawing explanation
Fig. 1 is that the present invention inscribes system and device schematic diagram; Wherein, 101 is ultraviolet source, and 102 is collimation condenser lens, and 103 is mask plate, and 104 is optical fiber, and 105 is electric rotating machine, and 106 for advancing motor;
Fig. 2 is for adopting one side exposure technique fiber core to be inscribed into the screw type grating schematic diagram with certain index modulation degree of depth, and wherein darker regions 107 is the index modulation degree of depth, and 108 is fibre cladding, and 109 is fiber core;
Fig. 3 is the asymmetric index distribution schematic diagram of one side exposure cross section of optic fibre.
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiment of the invention in detail, take that to inscribe Prague Helical Fiber grating be example.As shown in Figure 1: Written Device is comprised of ultraviolet source 101, collimation focusing lens 102, mask plate 103, electric rotating machine 105, the motor 106 that advances.The ultraviolet light that ultraviolet source 101 produces, after collimation focusing lens 102, be irradiated on mask plate 103, when adopting phase mask plate inscription short period Prague spiral grating, transmitted light by phase mask plate after can produce ± 1 order diffraction, the interference light that diffraction light forms exposes to the optical fiber 104 of being inscribed.When adopting amplitude type mask plate to inscribe long period spiral grating, on mask plate, directly expose in light transmission part on optical fiber 104.What inscribe employing is one side exposure technique, inscribes and has certain degree of depth as shown in Figure 3, and on cross section of optic fibre, 109 is fiber core, and 107 is the degree of depth of inscribing in fibre core.In the process of inscribing, electric rotating machine 105 drives fiber spinning, it can rotate to both direction, the motor 106 that advances drives optical fiber to move forward, the cycle of two motors of fine adjustment, make optical fiber when advancing one and inscribing periods lambda, fiber spinning one week, so just can inscribe into optical fiber the screw type (as shown in Figure 2) with certain depth.By the v speed that driven by motor optical fiber advances that represents to advance, ω represents that electric rotating machine rotarily drives the angular velocity size of fiber spinning, and ∧ represents the cycle of the grating that will inscribe, and the relation between them is:
Above the two motor cycles of accurate adjustment are carried: make optical fiber when advancing one and inscribing periods lambda, fiber spinning one week, so just can inscribe into optical fiber the screw type (as shown in Figure 2) with certain depth.Make them meet this relation
in addition, electric rotating machine can be realized the rotation of both direction, thereby inscribes out the fiber grating with the different hands of spiral.
Innovation of the present invention is: utilize mask plate, the technology that adopts single mode exposure to inscribe, both can inscribe long period Helical Fiber grating, also can inscribe short-period Prague Helical Fiber grating, can directly utilize mask plate inscription technology used at present, it is simple in structure, and principle is clear, cost is lower, easily realizes; Cycle can accurately be controlled, and stability is high.
Although described the present invention and advantage thereof in detail, should be appreciated that in the situation that do not deviate from the spirit and scope of the present invention defined by the appended claims, can carry out various variations, replacement and transformation.In addition, do not mean that the application's scope is limited to the specific embodiment of technique, equipment, manufacture and material composition, means, method and the step described in instructions.Those skilled in the art will be easy to recognize technique, equipment, manufacture, material composition, means, method or step that those exist now or that find from disclosure of the present invention later, and it is with described herein according to the present invention, corresponding enforcement is used completes substantially the same function or reach substantially the same result.Therefore, expect that appended claim is included in such technique, equipment, manufacture, material composition, means, method or step in their scope.
Claims (4)
1. the Written Device of a Helical Fiber grating, it is characterized in that: its structure is by ultraviolet source (101), collimation focusing lens (102), mask plate (103), electric rotating machine (105) and the motor that advances (106) form, the ultraviolet light that ultraviolet source (101) produces, after collimation focusing lens (102), be irradiated on mask plate (103), when adopting phase mask plate inscription short period Prague spiral grating, transmitted light by phase mask plate after can produce ± 1 order diffraction, the interference light that diffraction light forms exposes to the optical fiber of being inscribed (104), when adopting amplitude type mask plate to inscribe long period spiral grating, on mask plate, directly expose in light transmission part on optical fiber (104), what inscribe employing is one side exposure technique, inscription has certain degree of depth (107), in the process of inscribing, electric rotating machine (105) drives fiber spinning, electric rotating machine (105) can rotate to both direction, the motor (106) that advances drives optical fiber to move forward, regulate the cycle of two motors, make optical fiber when advancing one and inscribing periods lambda, fiber spinning one week, so just optical fiber can be inscribed into the screw type with certain depth, by the v speed that driven by motor optical fiber advances that represents to advance, ω represents that electric rotating machine rotarily drives the angular velocity size of fiber spinning, ∧ represents the cycle of the grating that will inscribe, relation between them is:
2. the Written Device of a kind of Helical Fiber grating according to claim 1, is characterized in that: described ultraviolet source (101) is Argon ion laser or excimer laser.
3. the Written Device of a kind of Helical Fiber grating according to claim 1, is characterized in that: mask plate is the phase mask plate of inscribing bragg grating, or inscribes macrocyclic amplitude type mask plate.
4. the Written Device of a kind of Helical Fiber grating according to claim 1, is characterized in that: the optical fiber that the driven by motor of advancing is inscribed moves forward vertically, and electric rotating machine can drive the optical fiber of being inscribed around axial-rotation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310590046.9A CN103605180A (en) | 2013-11-20 | 2013-11-20 | Etching device for spiral fiber grating fiber grating |
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| CN201310590046.9A CN103605180A (en) | 2013-11-20 | 2013-11-20 | Etching device for spiral fiber grating fiber grating |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969741A (en) * | 2014-05-11 | 2014-08-06 | 中国科学技术大学 | Orthogonal dislocation fiber Bragg grating writing device and method |
| CN105938219A (en) * | 2016-05-04 | 2016-09-14 | 上海交通大学 | Apparatus and method for manufacturing fiber grating on the basis of gamma radiation source |
| CN106353852A (en) * | 2016-11-18 | 2017-01-25 | 安徽蓝海之光科技有限公司 | Manufacturing method for low-cost long-period fiber bragg grating |
| CN106443872A (en) * | 2016-10-20 | 2017-02-22 | 北京信息科技大学 | Method for writing fiber bragg gratings with any grating region lengths on basis of adjustable diaphragm |
| CN106443873A (en) * | 2016-11-03 | 2017-02-22 | 北京信息科技大学 | Apparatus of precisely controlling pretightening force in FBG etching |
| CN106772782A (en) * | 2017-01-19 | 2017-05-31 | 华中科技大学 | A kind of continuous Written Device of multifunctional optical fiber micro-structural and method |
| CN107340565A (en) * | 2017-08-25 | 2017-11-10 | 武汉理工大学 | A kind of online device and method for preparing optical fiber optical grating array automatic switchover wavelength |
| CN109558762A (en) * | 2018-11-15 | 2019-04-02 | 无锡火眼睛睛科技发展有限公司 | A kind of anti-fake retrospective device of portable electronic based on bar code |
| CN109583916A (en) * | 2018-11-15 | 2019-04-05 | 无锡火眼睛睛科技发展有限公司 | A kind of electronic anti-fogery traceability system based on bar code |
| CN114799537A (en) * | 2022-03-18 | 2022-07-29 | 中山市精量光电子科技有限公司 | Method for preparing spiral chirped fiber grating by femtosecond laser micromachining technology |
| CN115327694A (en) * | 2022-03-31 | 2022-11-11 | 西北工业大学 | Clamping device for multi-core fiber Bragg grating laser direct writing |
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| US6751380B1 (en) * | 1997-11-26 | 2004-06-15 | Mitsubishi Cable Industries, Ltd. | Fiber grating and method and apparatus for fabricating the same |
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| CN203561765U (en) * | 2013-11-20 | 2014-04-23 | 中国科学技术大学 | Etching device for spiral fiber gratings |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969741B (en) * | 2014-05-11 | 2017-03-22 | 中国科学技术大学 | Orthogonal dislocation fiber Bragg grating writing device and method |
| CN103969741A (en) * | 2014-05-11 | 2014-08-06 | 中国科学技术大学 | Orthogonal dislocation fiber Bragg grating writing device and method |
| CN105938219A (en) * | 2016-05-04 | 2016-09-14 | 上海交通大学 | Apparatus and method for manufacturing fiber grating on the basis of gamma radiation source |
| CN106443872B (en) * | 2016-10-20 | 2019-04-16 | 北京信息科技大学 | One kind inscribing any grid region length of fibre grating approach based on adjustable diaphragm |
| CN106443872A (en) * | 2016-10-20 | 2017-02-22 | 北京信息科技大学 | Method for writing fiber bragg gratings with any grating region lengths on basis of adjustable diaphragm |
| CN106443873B (en) * | 2016-11-03 | 2019-03-19 | 北京信息科技大学 | A kind of accurate device for controlling pretightning force in FBG inscription |
| CN106443873A (en) * | 2016-11-03 | 2017-02-22 | 北京信息科技大学 | Apparatus of precisely controlling pretightening force in FBG etching |
| CN106353852A (en) * | 2016-11-18 | 2017-01-25 | 安徽蓝海之光科技有限公司 | Manufacturing method for low-cost long-period fiber bragg grating |
| CN106353852B (en) * | 2016-11-18 | 2019-08-02 | 安徽蓝海之光科技有限公司 | A kind of long-period fiber grating production method of low cost |
| CN106772782B (en) * | 2017-01-19 | 2017-10-31 | 华中科技大学 | A kind of continuous Written Device of multifunctional optical fiber micro-structural and method |
| CN106772782A (en) * | 2017-01-19 | 2017-05-31 | 华中科技大学 | A kind of continuous Written Device of multifunctional optical fiber micro-structural and method |
| CN107340565A (en) * | 2017-08-25 | 2017-11-10 | 武汉理工大学 | A kind of online device and method for preparing optical fiber optical grating array automatic switchover wavelength |
| CN107340565B (en) * | 2017-08-25 | 2018-10-09 | 武汉理工大学 | A kind of online device and method for preparing optical fiber optical grating array and automatically switching wavelength |
| CN109583916A (en) * | 2018-11-15 | 2019-04-05 | 无锡火眼睛睛科技发展有限公司 | A kind of electronic anti-fogery traceability system based on bar code |
| CN109558762A (en) * | 2018-11-15 | 2019-04-02 | 无锡火眼睛睛科技发展有限公司 | A kind of anti-fake retrospective device of portable electronic based on bar code |
| CN109583916B (en) * | 2018-11-15 | 2021-07-06 | 无锡火眼睛睛科技发展有限公司 | Electronic anti-counterfeiting tracing system based on bar codes |
| CN109558762B (en) * | 2018-11-15 | 2021-07-09 | 无锡火眼睛睛科技发展有限公司 | Portable electronic anti-counterfeiting tracing device based on bar codes |
| CN114799537A (en) * | 2022-03-18 | 2022-07-29 | 中山市精量光电子科技有限公司 | Method for preparing spiral chirped fiber grating by femtosecond laser micromachining technology |
| CN115327694A (en) * | 2022-03-31 | 2022-11-11 | 西北工业大学 | Clamping device for multi-core fiber Bragg grating laser direct writing |
| CN115327694B (en) * | 2022-03-31 | 2024-03-15 | 西北工业大学 | Clamping device for multi-core fiber Bragg grating laser direct writing |
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Application publication date: 20140226 |