CN106443872A - Method for writing fiber bragg gratings with any grating region lengths on basis of adjustable diaphragm - Google Patents
Method for writing fiber bragg gratings with any grating region lengths on basis of adjustable diaphragm Download PDFInfo
- Publication number
- CN106443872A CN106443872A CN201610916035.9A CN201610916035A CN106443872A CN 106443872 A CN106443872 A CN 106443872A CN 201610916035 A CN201610916035 A CN 201610916035A CN 106443872 A CN106443872 A CN 106443872A
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- Prior art keywords
- optical fiber
- diaphragm
- grating
- grid region
- region length
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
- G02B6/02133—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating using beam interference
- G02B6/02138—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating using beam interference based on illuminating a phase mask
Abstract
The invention discloses a method for writing fiber bragg gratings with any grating region lengths on the basis of an adjustable diaphragm. The method comprises the steps that hydrogen-support processing is conducted on an optical fiber, and a coating layer of the optical fiber is removed; shaping processing is conducted on a laser beam which is emitted by a laser and has the preset wavelength; the grating region length to be written is input to a software interface of an upper computer, the size of a diaphragm is adjusted according to the written grating region length, an optical fiber exposure area is adjusted by controlling a one-dimensional mobile platform, and the optical fiber is written to obtain the fiber bragg grating. According to the method, the problems that the cost of preparing fiber bragg gratings with different lengths is high, and manual optical path adjusting is complex and low in efficiency are solved; by providing the method for writing the fiber bragg gratings with the adjustable writing length, the fiber bragg gratings with the high uniform contrast ratio and the on-line continuous adjustable grating region lengths can be obtained.
Description
Technical field
The present invention relates to technical field of optical fiber, more particularly to a kind of based on any grid region length of fibre light of adjustable diaphragm inscription
Grid method.
Background technology
Fiber Bragg Grating FBG (abbreviation fiber grating), as one of 21st century of paramount importance photonic device, with
The advantages of its small volume, sensitivity height, Wavelength-encoding, electromagnetism interference and optical fiber are seamlessly connected, Fibre Optical Sensor, communication and
It is widely applied in the fields such as optical fiber laser.
Chinese patent 201310228540.0 discloses a kind of controlled fiber grating carving and writing method of bandwidth and device, China
Patent 201510213965.3 discloses a kind of device and method of inscription cycle adjustable optic fibre grating, but with fiber grating
In the extensive application in the field such as Fibre Optical Sensor, communication and optical fiber laser, also different to the length requirement of fiber grating, because
This is in order to meet requirement of engineering, and designing a kind of controlled preparing grating method of length of inscribing becomes the focus of research.
Content of the invention
It is an object of the invention to provide a kind of inscribe any grid region length of fibre grating approach, which inscribes efficiency high, operation
Method is simple and reusable.
The technical scheme is that：A kind of adjustable diaphragm that is based on inscribes any grid region length of fibre grating approach, the party
The device that method is adopted is made up of laser instrument, laser beam shaping system, phase mask plate, optical fiber and optical fiber clamping device, described
Laser beam shaping system include deviation mirror, expand microscope group, adjustable diaphragm and post lens, the detailed process of the carving and writing method is such as
Under：
Optical fiber is carried out hydrogen process is carried, and removes its coat；
By the laser of Shape correction through, in post lens focuss to phase mask plate, transmitted light produces ± 1 through phase mask plate
Order diffraction, the interference light that diffraction light is formed is inscribed to inscribing exposed optical fiber.
Preferably, described load hydrogen is processed to be included：Optical fiber is placed in load hydrogen pond of the preset air pressure with temperature, makes the optical fiber
Middle formation hydrogen-germanium chemical bond.
Preferably, the laser of the laser instrument transmitting vertically injects described expanding after 99% deviation mirror of surface coating
In microscope group, the deviation mirror is in 45 ° of angles with the laser instrument direction of the launch.
Preferably, the exposure area to optical fiber is inscribed and real-time monitoring includes：
Optical fiber two ends after the removal coat are respectively provided with wideband light source and spectrogrph, to the real-time inspection of scribing process
Survey, arrange below the optical fiber for removing coat and split as microscope, fiber lengths are verified.
Preferably, described specifically include according to inscribing grating length adjustment diaphragm size：Diaphragm parameter G size and grating
The relation of grid region length L represents for linear relationship formula (1)：
L=kG (1)
Wherein k value is that direct proportion coefficient, diaphragm parameter G refers to diaphragm lateral dimension.
Preferably, described regulation diaphragm specifically adjusts diaphragm horizontal direction distance, and method includes：With with a series of tools
The lighttight shelter of body size is blocked or from the adjustable diaphragm for carrying adjustable dimension.
The invention has the beneficial effects as follows：Based on phase mask plate, optical fiber is inscribed so that the fiber grating that is inscribed
Grid region length is not only restricted to inscribe the degree of warbling of Ultra-Violet Laser spot size and phase mask, you can reaching grating grid region length can
The purpose of control, the efficiency for being effectively reduced cost of manufacture and the method inscription is higher, and repeatability is stronger.
Description of the drawings
With reference to the accompanying drawing that encloses, the more purposes of the present invention, function and advantage are by by the as follows of embodiment of the present invention
Description is illustrated, wherein：
Fig. 1 inscribes the structured flowchart of any fiber grating grid region length device for the present invention.
Fig. 2 inscribes the structural representation of different length fiber grating for real-time monitoring of the present invention.
Fig. 3 is the relation schematic diagram of the diaphragm adjusting size with grating inscription length of the present invention.
Specific embodiment
By reference to one exemplary embodiment, the purpose of the present invention and function and the side for realizing these purposes and function
Method will be illustrated.However, the present invention is not limited to one exemplary embodiment disclosed below；Can by multi-form come
Which is realized.The essence of description is only to aid in the detail of the various equivalent modifications Integrated Understanding present invention.
Hereinafter, embodiments of the invention will be described with reference to the drawings.In the accompanying drawings, identical reference represents identical
Or similar part, or same or like step.
Embodiment 1
The invention provides a kind of inscribe any grid region length of fibre grating approach based on adjustable diaphragm, specifically include following
Step：Optical fiber carries out carrying hydrogen process, after removing its coat, is installed on the controlled fiber grating Written Device of grid region length
On；The controlled fiber grating Written Device of the grid region length by deviation mirror and expands the laser beam that microscope group is launched to laser instrument
Break-in and expand, the laser beam after expanding sets the grating length for inscribing grid region, adjustable diaphragm is by one-dimensional movement platform electricity
Dynamic control is simultaneously connected with computer by serial ports, and at upper computer software interface, input need to inscribe the grating length in grid region, according to quarter
Grating length adjustment diaphragm size is write, the diaphragm after adjustment is to the beam shaping that receives, one-dimensional according to Beam Control after shaping
Electric platforms adjust the exposure area of optical fiber.Based on phase mask plate, optical fiber is inscribed so that the fiber grating that is inscribed
Grid region length is not only restricted to inscribe the degree of warbling of Ultra-Violet Laser spot size and phase mask, you can reaching grating grid region length can
The purpose of control, the efficiency for being effectively reduced cost of manufacture and the method inscription is higher, and repeatability is stronger.
The invention provides a kind of inscribe any grid region length of fibre grating approach based on adjustable diaphragm, scribing process is concrete
Comprise the following steps：
Optical fiber is carried out hydrogen process is carried, and removes its coat.
Optical fiber is placed in load hydrogen pond of the preset air pressure with temperature through load hydrogen after a while, makes to be formed in the optical fiber
Hydrogen-germanium (H-Ge) chemical bond, becomes grid quickly to inscribe optical fiber in order to optical fiber；Optical fiber wire stripper are recycled to remove the optical fiber
Coat, it is generally the case that go the length in coat region no less than 20cm, go the length in coat region to cover more than phase place
The length of lamina membranacea.
The laser beam shaping that laser instrument 101 is launched is processed.
Laser beam shaping system includes deviation mirror 102, expands microscope group 103, adjustable diaphragm 104 and post lens 105, adjustable
Diaphragm 104 is by 109 Electronic control of one-dimensional movement platform and adjustable diaphragm 104 is connected with computer 110 by serial ports；Laser instrument
The diverted mirror of laser beams 102 of 101 transmittings and expand microscope group 103 and expand, by the laser beam after expanding in computer software
Interface input is intended inscribing grating grid region length, according to the width of grid region length adjustment adjustable diaphragm 104；After adjustable diaphragm is to expanding
Laser beam shaping process.
For reducing the cost of fiber grating inscription in the embodiment of the present invention, it is ensured that inscription fiber grating grid region length is controlled,
Need to carry out shaping to the transmitting laser beam of laser instrument 101, specifically：Using deviation mirror 102 and expand 103 pairs of laser of microscope group
The laser of the predetermined wavelength (for example, the Ultra-Violet Laser of 248nm) that device 101 is launched is expanded；It is being connected with diaphragm by serial ports
Computer software interface input intend need inscribe grating grid region length；Grating grid region length adjustment diaphragm width according to input
Degree simultaneously carries out shaping to the laser beam for receiving while adjusting exposure area by one-dimensional movement platform 109；Post lens 105 will
The laser beam focusing of the shaping for receiving.
Preferably, deviation mirror 102 is 99% high reflection mirror of a surface coating, and the deviation mirror and laser instrument launch party
To being in 45 ° of angles, it is finely adjusted for changing laser optical path and to laser optical path.
Preferably, computer software interface arranges grating grid region length and diaphragm parameters relationship program, is input into grating grid region
Length obtains diaphragm parameter through computed in software, and diaphragm parameter G size is linear relationship formula with the relation of grating grid region length L
(1) represent：
L=kG (1)
Preferably, described one-dimensional movement platform 109 is controlled by controller, it is possible to achieve is at the uniform velocity moved, is realized grid region
Uniform length is inscribed.
Light beam after focusing is inscribed through the exposure area of 106 pairs of optical fiber of phase mask plate, the light needed for obtaining
Fine grating.
Phase mask plate 106 is used for producing ± l order diffraction light, and diffraction light is alternatively formed interference fringe, exposure area is entered
Row is inscribed, and obtains fiber grating.
FBG monitoring and detection in scribing process.
Fig. 2 shows that real-time monitoring of the present invention inscribes the structure chart of different length fiber grating.As shown in Fig. 2 described
Remove the optical fiber two ends after coat and be respectively provided with wideband light source 220 (such as ASE wideband light source), spectrogrph 230 and spectrogrph
231, spectrogrph 230 and spectrogrph 231 monitor reflectance spectrum and transmitted spectrum respectively, carry out real-time monitoring to scribing process (right
In different length grating scribing process, optical grating reflection spectrum carries out real-time monitoring with transmission spectrum), wideband light source 220 and spectrogrph 230
It is connected with 210 port 1 of bonder and port 2, spectrogrph 231 is connected with optical fiber one end, the optical fiber other end and 210 port of bonder
3 connections, arrange below the optical fiber 108 for removing coat and split as microscope 240, grating length is verified and is detected.
Embodiment 2
Fig. 1 is a kind of structured flowchart of any fiber grating grid region length device of inscription of the offer of the embodiment of the present invention 2.Such as
Shown in Fig. 1, the device includes：Laser instrument 101, deviation mirror 102, expand microscope group 103, adjustable diaphragm 104, post lens 105, phase place
Mask plate 106, optical fiber 108 and optical fiber clamping device 107.
Described laser instrument 101 is used for launching the laser of predetermined wavelength.
The post lens 105, for being focused processing to the laser of Shape correction.
The deviation mirror 102, is finely adjusted for changing laser optical path and to laser optical path.
Described expand microscope group 103, for expanding shaping to laser beam.
The phase mask plate 105, for being inscribed to the exposure area of the optical fiber using the laser after focusing.
Described optical fiber clamping device 107 is provided with rubber blanket with optical fiber contact face, it is ensured that frictional force effect is not made to optical fiber
Become to damage；Described optical fiber clamping device is used for fixing and positioning optical fiber.
The adjustable diaphragm 104 receives the laser beam after shaping and to laser beam Shape correction again；Described adjustable
Diaphragm 104 is circular, rectangle or square, depending on practical situation is inscribed；Described adjustable diaphragm 104 is placed in one-dimensional shifting
109 top of moving platform, diaphragm is adjusted the horizontal level of diaphragm and then is changed by 109 Electronic control of one-dimensional movement platform and goes coating
The exposure area of layer optical fiber 108, described one-dimensional movement platform 109 controlled by controller, can at the uniform velocity move that to realize grid region long
Degree is uniform to be inscribed；Described adjustable diaphragm 104 is connected with computer 110 by serial ports, and user passes through to intend in software interface input
Inscribe grating grid region length to adjust diaphragm size；The adjustable diaphragm 104 adjusts the method for diaphragm width to be included：With light tight
The shelter with concrete size block through hole (the such as cloth of concrete size or wooden unit etc.) or carry the light of adjustable dimension
Door screen, changes aperture stop size (aperture in such as photographic lens) by adjusting handle.
Explanation and practice in conjunction with the present invention for disclosing here, the other embodiment of the present invention is for those skilled in the art
All will be readily apparent and understand.Illustrate and embodiment be to be considered only as exemplary, the true scope of the present invention and purport equal
It is defined in the claims.
Claims (6)
1. a kind of any grid region length of fibre grating approach is inscribed based on adjustable diaphragm, the device that the method is adopted by laser instrument,
Laser beam shaping system, phase mask plate, optical fiber and optical fiber clamping device composition, described laser beam shaping system includes
Deviation mirror, microscope group, adjustable diaphragm and post lens are expanded, the detailed process of the carving and writing method is comprised the following steps：
Optical fiber is carried out hydrogen process is carried, and removes its coat；
The laser beam of the predetermined wavelength of laser instrument transmitting through deviation mirror and expands microscope group break-in and expands process, after expanding
Laser beam set the grid region length for inscribing grating, methods described includes following sub-step：Adjustable diaphragm is put down by one-dimensional movement
Platform Electronic control is simultaneously connected with computer by serial ports, and at upper computer software interface, input need to inscribe the grid region length of grating, root
Diaphragm size is adjusted according to grating length is inscribed, beam shaping of the diaphragm after adjustment to reception, according to the Beam Control after shaping
One-dimensional electric platforms adjust the exposure area of optical fiber；
By the laser of Shape correction through, in post lens focuss to phase mask plate, transmitted light produces ± 1 grade through phase mask plate and spreads out
Penetrate, the interference light that diffraction light is formed is inscribed to inscribing exposed optical fiber, and real-time monitoring fiber grating.
2. according to claim 1 a kind of based on any grid region length of fibre grating approach of adjustable diaphragm inscription, its feature
It is, described load hydrogen is processed and included：Optical fiber is placed in load hydrogen pond of the preset air pressure with temperature, make in the optical fiber formed hydrogen-
Germanium chemical bond.
3. according to claim 1 a kind of based on any grid region length of fibre grating approach of adjustable diaphragm inscription, its feature
Be, the laser of laser instrument transmitting vertically inject after 99% deviation mirror of surface coating described expand in microscope group, institute
Deviation mirror is stated with the laser instrument direction of the launch in 45 ° of angles.
4. according to claim 1 a kind of based on any grid region length of fibre grating approach of adjustable diaphragm inscription, its feature
It is, the exposure area to optical fiber is inscribed and real-time monitoring includes：
Optical fiber two ends after the removal coat are respectively provided with wideband light source and spectrogrph, to scribing process real-time detection,
Arrange below the optical fiber for removing coat and split as microscope, fiber lengths are verified.
5. according to claim 1 a kind of based on any grid region length of fibre grating approach of adjustable diaphragm inscription, its feature
It is, described specifically includes according to inscription grating length adjustment diaphragm size：Diaphragm parameter G size and grating grid region length L
Relation be linear relationship formula (1) represent：
L=kG (1)
Wherein k value is direct proportion coefficient.
6. according to claim 1 a kind of based on any grid region length of fibre grating approach of adjustable diaphragm inscription, its feature
It is, described regulation diaphragm specifically adjusts diaphragm horizontal direction distance, and method includes：With with a series of concrete sizes not
The shelter of printing opacity is blocked or from the adjustable diaphragm for carrying adjustable dimension.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910269960.0A CN109828327B (en) | 2016-10-20 | 2016-10-20 | Method for writing fiber bragg grating with any grating area length based on adjustable diaphragm |
| CN201610916035.9A CN106443872B (en) | 2016-10-20 | 2016-10-20 | One kind inscribing any grid region length of fibre grating approach based on adjustable diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610916035.9A CN106443872B (en) | 2016-10-20 | 2016-10-20 | One kind inscribing any grid region length of fibre grating approach based on adjustable diaphragm |
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| CN201910269960.0A Division CN109828327B (en) | 2016-10-20 | 2016-10-20 | Method for writing fiber bragg grating with any grating area length based on adjustable diaphragm |
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| CN106443872A true CN106443872A (en) | 2017-02-22 |
| CN106443872B CN106443872B (en) | 2019-04-16 |
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| CN201910269960.0A Active CN109828327B (en) | 2016-10-20 | 2016-10-20 | Method for writing fiber bragg grating with any grating area length based on adjustable diaphragm |
| CN201610916035.9A Active CN106443872B (en) | 2016-10-20 | 2016-10-20 | One kind inscribing any grid region length of fibre grating approach based on adjustable diaphragm |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908896A (en) * | 2017-03-31 | 2017-06-30 | 武汉光谷航天三江激光产业技术研究院有限公司 | A kind of method and device for making fiber grating |
| WO2019047145A1 (en) * | 2017-09-08 | 2019-03-14 | 深圳大学 | Device for fabricating optical fiber bragg grating, and fabrication method thereof |
| CN109799574A (en) * | 2019-03-01 | 2019-05-24 | 南京聚科光电技术有限公司 | A kind of the fiber grating preparation facilities and its method of random pattern |
| CN110673258A (en) * | 2019-09-29 | 2020-01-10 | 北京工业大学 | System for writing various fiber gratings by ultraviolet laser mask plate method |
| CN112059404A (en) * | 2020-09-07 | 2020-12-11 | 中国科学院西安光学精密机械研究所 | Superfine single crystal optical fiber cladding processing method and system |
| WO2022165960A1 (en) * | 2021-02-02 | 2022-08-11 | 深圳大学 | Fiber grating manufacturing method and manufacturing device capable of regulating birefringence |
| CN114966953A (en) * | 2022-06-24 | 2022-08-30 | 湖北工业大学 | Method for manufacturing optical fiber grating |
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| CN114397728B (en) * | 2021-12-30 | 2024-02-27 | 昂纳科技(深圳)集团股份有限公司 | Fiber grating lens production process and production system |
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| CN109799574A (en) * | 2019-03-01 | 2019-05-24 | 南京聚科光电技术有限公司 | A kind of the fiber grating preparation facilities and its method of random pattern |
| CN110673258A (en) * | 2019-09-29 | 2020-01-10 | 北京工业大学 | System for writing various fiber gratings by ultraviolet laser mask plate method |
| CN112059404A (en) * | 2020-09-07 | 2020-12-11 | 中国科学院西安光学精密机械研究所 | Superfine single crystal optical fiber cladding processing method and system |
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| WO2022165960A1 (en) * | 2021-02-02 | 2022-08-11 | 深圳大学 | Fiber grating manufacturing method and manufacturing device capable of regulating birefringence |
| CN114966953A (en) * | 2022-06-24 | 2022-08-30 | 湖北工业大学 | Method for manufacturing optical fiber grating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109828327B (en) | 2020-06-12 |
| CN109828327A (en) | 2019-05-31 |
| CN106443872B (en) | 2019-04-16 |
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