CN104635295B - A kind of online fiber grating preparation system - Google Patents
A kind of online fiber grating preparation system Download PDFInfo
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- CN104635295B CN104635295B CN201510114462.0A CN201510114462A CN104635295B CN 104635295 B CN104635295 B CN 104635295B CN 201510114462 A CN201510114462 A CN 201510114462A CN 104635295 B CN104635295 B CN 104635295B
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- cocoons
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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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The present invention relates to a kind of online fiber grating preparation system,Including wire-drawer-tower and grating Written Device,Described wire-drawer-tower includes fiber drawing furnace and the prefabricated rods hitch feed device being installed in above fiber drawing furnace,Bare fibre caliper is installed below fiber drawing furnace plug for outlet,Inscription grating device is installed below bare fibre caliper,Vertical down direction along bare fibre sets optical fiber coating solidification equipment in the lower section for inscribing grating device,The lower section of optical fiber coating solidification equipment sets the take-up mechanism that reels off raw silk from cocoons,It is characterized in that described inscription grating device includes phase mask plate and 193nm excimer lasers,Phase mask plate is centrally disposed against bare fibre,Install diaphragm and lens in 193nm excimer laser output ends interval,193nm excimer lasers export single-pulse laser beam,Pass through diaphragm shaping,Pass through lens focus again,It is irradiated on phase mask plate.It is reasonable that the present invention is not only set, and stable performance, producing efficiency is high, and manufactured grating precision is high, grating spectrum shape is good, uniformity is high.
Description
Technical field
The present invention relates to a kind of preparation system of online fiber grating, belong to fiber grating preparing technical field.
Background technology
Fiber grating is one of fiber optic passive device most representative, most promising at present, has insertion
The advantages that small, extinction ratio is high is lost, in optical fiber laser, fiber amplifier, optical fiber filter, fibre optical sensor and fiber optic communication
System etc. has extensive use.In sensory field of optic fibre, the advantage of fiber grating is especially prominent, and extensive multiplexing can be formed
Long range multi-parameter optical fiber optical grating sensing network.
The fiber grating concatenation of big quantity turns into array, is the basis for forming large-scale optical fiber grating sensing network.Tradition
On to prepare the method for optical fiber optical grating array be that finished product optical fiber first is cut into section, the organic protection layer of optical fiber surface is divested, used
Laser explosure prepares grating, and second coat is carried out to grating, then using the method welded by every a bit of optical fiber, that is, often
One single grating is connected in series.Due to be it is single prepare grating, preparation efficiency is low, and the quality of grating is unstable.Divest light
The organic protection layer on fine surface can damage the tensile strength of optical fiber significantly, and fine feelings of breaking also easily occurs in optical fiber weld
Condition, cause the less reliable of fibre system.In addition, optical fiber welding causes insertion loss significantly to increase, big quantity can not be accomplished
It is multiplexed and compared with low-loss.
On fiber drawing tower, the method that fiber grating is prepared during drawing optical fiber and forms array can solve
Problem above.In fiber draw process, laser explosure is carried out to bare fibre, realizes online write-in grating, then to optical fiber and light
Grid are coated, and can be effectively prevented from divesting organic protection layer fiber strength is caused damage.In optical fiber moving process, to optical fiber
Multiexposure, multiple exposure and write multiple gratings and form array, welding process can be removed from, avoid weld optical fiber and increase insertion loss.
But existing dynamic prepares the system of fiber grating online, and there is also some problems：First, using light path-splitting
Interferometric method prepares grating, is to change the Bragg wavelength of write-in grating by rotating the angle of two pieces of speculums.Due to cloth loudspeaker
Lattice wave length is very sensitive to the angle of speculum, and wavelength accuracy control needs performance high control device when within 1nm, because
And control difficulty big, cause the uniformity of grating poor；Second, it is longer, it is necessary to by multiple reflections, turn to inscribe the light path used
Folding, therefore it is required that have good vibration-isolating platform and stable working environment, but in actual mechanical process, influence factor is a lot,
The uniformity that this can also influence grating is poor；3rd, inscription light source is 248nm laser, the uniformity of laser beam, laser pulse it is steady
Qualitative, laser-beam acquiring point stability and coherence are relatively low so that prepared grating spectrum shape is poor, uniformity is poor, causes
Grating array it is of low quality.
The content of the invention
Problem to be solved by this invention is to provide a kind of dynamic in linear light for above-mentioned the shortcomings of the prior art
The preparation system of fine grating, it is not only set rationally, stable performance, and producing efficiency is high, and manufactured grating precision is high, grating
Spectrum shape is good, uniformity is high.
The present invention is to solve the problems, such as that used technical scheme set forth above is：
Including wire-drawer-tower and grating Written Device, described wire-drawer-tower includes fiber drawing furnace and is installed in pre- above fiber drawing furnace
Rod hitch feed device processed, installs bare fibre caliper below fiber drawing furnace plug for outlet, is installed below bare fibre caliper
Grating device is inscribed, the vertical down direction along bare fibre sets optical fiber coating to solidify dress in the lower section for inscribing grating device
Put, the lower section of optical fiber coating solidification equipment sets the take-up mechanism that reels off raw silk from cocoons, it is characterised in that described inscription grating device includes phase
Bit mask plate and 193nm excimer lasers, phase mask plate is centrally disposed against bare fibre, and 193nm excimer lasers are defeated
Go out to hold interval to install diaphragm and lens, 193nm excimer lasers output single-pulse laser beam, by diaphragm shaping, then pass through
Lens focus, it is irradiated on phase mask plate.
By such scheme, described diaphragm and lens are set along laser beam rectilinear direction, and single-pulse laser beam keeps straight line
Transmit and irradiated perpendicular to bare fibre, laser beam by mask plate onto bare fibre.
By such scheme, the pulsewidth of the single-pulse laser beam of described 193nm excimer laser output is less than or waited
In 4ns；193nm excimer laser is connected with computer.
By such scheme, described phase mask plate is smaller than or equal to 0.5mm with bare fibre center.
By such scheme, optical fiber calliper gauge is installed below optical fiber coating solidification equipment.
By such scheme, the described take-up mechanism that reels off raw silk from cocoons includes tensile measurer and is installed in the wheel that reels off raw silk from cocoons of its side, takes out
The opposite side of silk wheel sets reel off raw silk from cocoons take-up speed coalignment and take-up reel.
By such scheme, stop position labelling apparatus is provided between wheel and the take-up speed coalignment that reels off raw silk from cocoons reeling off raw silk from cocoons.
By such scheme, described optical fiber coating solidification equipment is that two level coats solidification equipment, including along bare fibre
Vertical down direction order sets one-level applicator and Primary UV curing oven, two level applicator and two level uv oven.
By such scheme, the drawing speed of the described wheel that reels off raw silk from cocoons is 2 ~ 30m/min, usually 15m/min.
The beneficial effects of the present invention are：1st, it is reasonable to set, can dynamic on-line continuous prepare optical fiber optical grating array, make effect
Rate is high；2nd, using phase-mask method, for specified optical fiber and specific phase mask plate, the effective refractive index and mask of optical fiber
The cycle of plate is that the wavelength of fixed, made fiber grating is a stationary value, can reach accurate control grating cloth loudspeaker
The purpose of lattice wave length, particularly can prepare multiple identical gratings, so as to prepare high-quality grating in an optical fiber
Array；3rd, 193nm PRKs coherence, uniformity and stability are good, and peak power is high, pulse width, preparing grating efficiency
Height, the raster center of inscription is Wavelength stabilized, and grating spectrum shape is good, grating reflectivity uniformity is high；4th, the simple venation of laser output
The shaped diaphragm of laser beam, condenser lens, phase mask plate, irradiate and grating are write on bare fibre, and light path is straight line and hung down
Directly in bare fibre, speculum is not used to change light path trend, the stability of light path is improved, so as to improve the one of grating array
Cause property.The present invention solve prepared online on wire-drawer-tower grating stability it is poor, poor reliability and grating quality are poor, efficiency is low
Problem.
Brief description of the drawings
Fig. 1 is the wire-drawer-tower system schematic for the present invention.
Fig. 2 is that grating device and its enlarged diagram of light path part are inscribed in Fig. 1.
Embodiment
Embodiments of the invention are further illustrated below in conjunction with accompanying drawing.
It is made up of wire-drawer-tower and inscription grating device, including fiber drawing furnace 2 clamps with the prefabricated rods being installed in above fiber drawing furnace
Feed device 1, bare fibre caliper 3 is installed below fiber drawing furnace plug for outlet, inscription light is installed below bare fibre caliper
Grid device 5, the vertical down direction along bare fibre 4 set one-level applicator 6 and one in the lower section order for inscribing grating device
Optical fiber calliper gauge 10 is installed in level uv oven 7, two level applicator 8 and two level uv oven 9, two level uv oven lower section
To detect the external diameter of coated fiber 11, coated fiber and then reeled off raw silk from cocoons wheel 13 by the switching of tensile measurer 12, by grating position
Tagging device 14 and the take-up speed coalignment 15 that reels off raw silk from cocoons collapse to take-up reel 16.The drawing speed of wheel of reeling off raw silk from cocoons is 2 ~ 30m/
min.Described inscription grating device includes phase mask plate 17 and 193nm excimer lasers 21, and phase mask plate is against naked
Fiber optic hub is set, and is 0.3mm with bare fibre center spacing.Install the He of diaphragm 19 in 193nm excimer laser output ends interval
Lens 18,193nm excimer lasers output single-pulse laser beam, by diaphragm shaping, then by lens focus, are irradiated to phase
On bit mask plate, PRK light path（Beam）20 keep linear transmission and perpendicular to bare fibre 4.193nm PRK
The pulsewidth of the single-pulse laser beam of device output is less than or equal to 4ns.193nm excimer laser is connected with computer 22, carves
Grating process is write to be controlled by computer.
The method that the present invention prepares fiber grating is as follows：Quartz glass matrix preform is clamped in fiber drawing tower
Upper progress melt drawing processing, the bare fibre for being melt into fibre are persistently extended downwardly, and advanced line raster is inscribed, and then passes through extexine
Coating and drying, finally close at take-up reel, and described grating inscribes the PRK pair using phase-mask method configuration 193nm
Bare fibre carries out pulse exposure write-in grating.Exposure is carried out with coating take-up for on-line continuous.Described PRK light
Road（Beam）20 holding linear transmissions are simultaneously less than or equal to perpendicular to bare fibre 4, the pulsewidth of described 193nm PRK
4ns。
Preform is placed in fiber drawing furnace 2, and melting post-tensioning cone in its lower end is monitored naked into silk by bare fibre caliper 3
The speed of fibre diameter and real-time feedback control prefabricated rods feed device 1 and bare fibre 4, realize the stable control of bare-fiber diameter
System.Wire Drawing speed is 15m/min.From the inscription grating device 5 that phase mask plate and 193nm lasers are formed to moving down
Grating is write on dynamic bare fibre, a light pulse writes a grating, and the bare fibre for being written with grating subsequently enters for the first time
Coating 6 and for the first time solidification 7, then carry out second of coating 8 and second of solidification 9.Optical fiber is surveyed by coated fiber after coating
Footpath instrument 10 monitors the diameter of coated fiber 11, controls the thickness of coat.Tension force suffered by the monitoring optical fiber of tensile measurer 12, while with
Prefabricated rods feed device 1 positions optical fiber jointly, optical fiber is kept vertical state.Reel off raw silk from cocoons the control drawing speed of wheel 13.Coated fiber
11 under the effect of wheel 13 of reeling off raw silk from cocoons, after stop position labelling apparatus 14 puts on mark, by the take-up speed coalignment 15 that reels off raw silk from cocoons
After be collected on take-up reel 16.
The present invention uses 193nm laser combination phase-mask methods, in low loss fiber drawing process, to bare fibre simple venation
Rush exposure and prepare antiradar reflectivity grating, continuous exposure, prepare the low reflection of one to 100,000 high-quality online on wire-drawer-tower
Rate fiber grating simultaneously forms array.In drawing process to feed device, fiber drawing furnace, applicator, uv oven, gas flow and
The equipment such as pressure, fiber tension, drawing speed and state carry out on line real-time monitoring, by two calipers to bare-fiber diameter
And the diameter of optical fiber measures after coating, the regulation and control to whole system are realized, ensures that whole system is stable and transports
OK.In addition, under the conditions of controlled temperature and humidity online write-in grating, make grating writing point optical fiber background temperature have compared with
Good uniformity.By controlling bare fibre translational speed above other measures, bare-fiber diameter, fiber tension are stably controlled,
Ensure that optical fiber internal stress is stable, so as to ensure that the grating write online has uniformity.Grating process is inscribed by computer 22
Control, the spacing and laser beam intensity between grating can be set on request.
Claims (9)
1. a kind of online fiber grating preparation system, including wire-drawer-tower and grating Written Device, described wire-drawer-tower include wire drawing
Stove and the prefabricated rods hitch feed device being installed in above fiber drawing furnace, install bare fibre caliper below fiber drawing furnace plug for outlet,
Inscription grating device is installed below bare fibre caliper, the vertical down direction along bare fibre is inscribing grating device
Lower section sets optical fiber coating solidification equipment, and the lower section of optical fiber coating solidification equipment sets the take-up mechanism that reels off raw silk from cocoons, it is characterised in that institute
The inscription grating device stated includes phase mask plate and 193nm excimer lasers, and phase mask plate is set against bare fibre center
Put, diaphragm and lens, 193nm excimer lasers output single-pulse laser are installed in 193nm excimer laser output ends interval
Beam, by diaphragm shaping, then by lens focus, it is irradiated on phase mask plate；Described diaphragm and lens is straight along laser beam
Line direction is set, and single-pulse laser beam keeps linear transmission and arrives naked light by mask plate irradiation perpendicular to bare fibre, laser beam
On fibre.
2. online fiber grating preparation system according to claim 1, it is characterised in that described 193nm quasi-molecule swashs
The pulsewidth of the single-pulse laser beam of light device output is less than or equal to 4ns.
3. online fiber grating preparation system according to claim 1 or 2, it is characterised in that 193nm PRK
Device is connected with computer.
4. online fiber grating preparation system according to claim 1 or 2, it is characterised in that described phase mask plate with
Bare fibre is smaller than or equal to 0.5mm.
5. online fiber grating preparation system according to claim 1 or 2, it is characterised in that in optical fiber coating solidification equipment
Install optical fiber calliper gauge in lower section.
6. online fiber grating preparation system according to claim 1 or 2, it is characterised in that the described take-up mechanism that reels off raw silk from cocoons
Including tensile measurer and the wheel that reels off raw silk from cocoons for being installed in its side, the opposite side of the wheel that reels off raw silk from cocoons set reel off raw silk from cocoons take-up speed coalignment and
Take-up reel.
7. online fiber grating preparation system according to claim 6, it is characterised in that in wheel and the take-up speed of reeling off raw silk from cocoons of reeling off raw silk from cocoons
Stop position labelling apparatus is provided between degree coalignment.
8. online fiber grating preparation system according to claim 1 or 2, it is characterised in that described optical fiber coating solidification
Device is that two level coats solidification equipment, including sets one-level applicator and one-level purple along the vertical down direction order of bare fibre
Outer curing oven, two level applicator and two level uv oven.
9. online fiber grating preparation system according to claim 6, it is characterised in that the wire drawing speed of the described wheel that reels off raw silk from cocoons
Spend for 2 ~ 30m/min.
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| CN201510114462.0A CN104635295B (en) | 2015-03-17 | 2015-03-17 | A kind of online fiber grating preparation system |
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| CN201510114462.0A CN104635295B (en) | 2015-03-17 | 2015-03-17 | A kind of online fiber grating preparation system |
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| CN104635295A CN104635295A (en) | 2015-05-20 |
| CN104635295B true CN104635295B (en) | 2018-01-09 |
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| CN105891945A (en) * | 2016-06-24 | 2016-08-24 | 西安盛佳光电有限公司 | Continuous production method of fiber bragg grating (FBG) |
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| CN107991734B (en) * | 2018-01-03 | 2019-09-10 | 武汉理工大学 | The stop position labelling apparatus and method of optical fiber optical grating array are prepared online |
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| CN109238355B (en) * | 2018-08-30 | 2020-08-25 | 武汉理工大学 | Device and method for simultaneously sensing and measuring distributed dynamic and static parameters of optical fiber |
| CN109883461B (en) * | 2019-03-15 | 2021-02-02 | 哈尔滨工程大学 | Method and device for manufacturing multilayer optical fiber strain disc |
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| CN111208602B (en) * | 2020-01-21 | 2021-03-23 | 武汉理工大学 | Device and method for preparing weak grating array with continuous wavelength change on line |
| WO2022061558A1 (en) * | 2020-09-23 | 2022-03-31 | 江苏亨通光纤科技有限公司 | Method and device for manufacturing long-period fiber grating |
| CN114415287B (en) * | 2022-01-24 | 2023-04-18 | 武汉理工大学 | Hydrogen-resistant carbon-coated fiber grating string and preparation method and preparation device thereof |
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| CN1529192A (en) * | 2003-10-21 | 2004-09-15 | 中国科学院上海光学精密机械研究所 | Method for manufacturing low double-refraction optical-fiber grating |
| CN102590929A (en) * | 2012-02-17 | 2012-07-18 | 武汉理工大学 | Method for continuously preparing fiber gratings on line |
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| KR100342532B1 (en) * | 2000-08-04 | 2002-06-28 | 윤종용 | Fabrication device of polarization insensitive long period fiber grating |
| JP2005196089A (en) * | 2004-01-09 | 2005-07-21 | Furukawa Electric Co Ltd:The | Fiber bragg grating element |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1529192A (en) * | 2003-10-21 | 2004-09-15 | 中国科学院上海光学精密机械研究所 | Method for manufacturing low double-refraction optical-fiber grating |
| CN102590929A (en) * | 2012-02-17 | 2012-07-18 | 武汉理工大学 | Method for continuously preparing fiber gratings on line |
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