CN103048728A - Device and method for simultaneously inscribing by multi-wavelength grating in multi-core banding optical fiber - Google Patents
Device and method for simultaneously inscribing by multi-wavelength grating in multi-core banding optical fiber Download PDFInfo
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- CN103048728A CN103048728A CN2012105169801A CN201210516980A CN103048728A CN 103048728 A CN103048728 A CN 103048728A CN 2012105169801 A CN2012105169801 A CN 2012105169801A CN 201210516980 A CN201210516980 A CN 201210516980A CN 103048728 A CN103048728 A CN 103048728A
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Abstract
The invention discloses a device and method for simultaneously inscribing by a multi-wavelength grating in a multi-core banding optical fiber. The method comprises a design processing step for optical fiber positioning chutes, an establishing and aligning step for an optical path and a grating inscribing step and belongs to the technical field of optical communication-optical fiber sensing. A principle that a central wavelength of an optical grating shifts following axial deformation is utilized, each chute interval between the array optical fiber positioning chutes is corresponding to an interval between coating-removed optical fibers in the banding optical fiber, and stretching volume of each optical fiber is regulated and controlled by adjusting and hanging self-designed high-precision weights, so that the accurate control on the central wavelength of the grating is realized. An array grating prepared by the system is excellent in repeatability, high in precision, less in damage and suitable for the batch production of array gratings with controllable wavelength in the banding optical fiber.
Description
Technical field
The present invention relates to producing device and the method for fiber grating, particularly inscribe the device and method of different wave length optical fiber at the multicore ribbon fiber.
Background technology
Fiber grating is a kind of important optical element, in optical communication and sensory field important effect is arranged.The ribbon fiber connection is simple and convenient, density of optic fibre is high, is widely used in optical fiber communication, sensory field of optic fibre.
The phase mask plate method has been widely used in preparing fiber grating at present, and the phase mask plate method is simple to operate, and made grating parameter stability is high.Because the phase mask plate cycle is fixed, need to take some measures so will make the grating of different centre wavelengths, making the widely used method of different centre wavelength gratings is that prestress changes the grating cycle
Because multicore ribbon fiber each optical fiber in preparation process unavoidably exists extruding or rotation, the ribbon fiber overall package is unfavorable for each optical fiber is implemented accurate Stress Control; Optical fiber arrangement is tight, inscribes operating difficulties by root, and can unavoidably bring systematic error by the root inscription.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, can be in fibre multifiber apply the device and method that the multi-wavelength grating is inscribed simultaneously in the multicore ribbon fiber of different controlled stress.The method is inscribed grating based on uv-exposure mask plate method, and the stress that applies when writing grating processed by accurate control again simultaneously realizes inscribing the different wave length grid.
Technical scheme of the present invention is as follows:
One, Written Device of the present invention mainly includes: excimer laser, phase mask plate, photosensitive tape be fine, be with fine anchor clamps, array fibre positioning runner plate and high precision counterweight.On the light path of excimer laser, from the close-by examples to those far off be provided with successively the fine interlude of photosensitive tape of the phase mask plate vertical with light path and level.This photosensitive tape fibre comprises single-mode fiber, doped fiber, photonic crystal fiber, and its interlude is for removing the bare fibre of whole external packing, and the photosensitive tape of these interlude both sides is fine, and its level one side is fixed on to be with on the fine anchor clamps, and vertical opposite side is free segment.Bare fibre between above-mentioned phase mask plate and vertical photosensitive tape fibre is provided with array fibre positioning runner plate, this array fibre positioning runner plate is provided with and the same number of one group of V-shaped groove of bare fibre, this V-shaped groove is the trough with straight angle of rounding off, they are not contour horizontally, this V-shaped groove horizontal component and in the inner bare fibre of position be identical with the height on the fibre, and the distance between one group of V-shaped groove horizontal component equals bare fibre to each other distance on fibre.Below each V-shaped groove, all establish one with the vertical small column that links to each other of coulisse, i.e. guide posts, the distance between them is greater than the distance between the optical fiber, bare fibre is walked around guide posts, so that hang counterweight thereon and stretching is independent of each other.Bare fibre below guide pillar is provided with the high precision counterweight, this high precision counterweight is comprised of two semicolumns, the face that this two semicolumn is relative is inlaid with respectively opposite polarity two blocks of magnet, preferably there is the V-shaped groove at the axis place of this two semicolumn, V-shaped groove undersized is in fiber size, only optical fiber need to be placed in the use procedure between two semicolumns in the V-shaped groove, closing gets final product.
Two, carving and writing method of the present invention
1, excimer laser and phase mask plate are set.Ribbon fiber level one side is fixed on is with on the fine anchor clamps, make ribbon fiber consistent with excimer laser and phase mask plate height.
2, separate the interlude bare fibre of removing whole external packing, by placing highly respectively V-shaped groove corresponding to array fibre positioning runner plate.Adjust the position of array fibre positioning runner plate, make all maintenance levels of each bare fibre and be consistent with the phase mask plate distance.
3, determine the fiber bragg grating center wavelength drift value and hang counterbalance mass between linear relationship
, wherein,
Be wavelength shift,
Be the wave length shift coefficient, for standard single-mode fiber G.652
,
Be counterbalance mass.The counterbalance mass that should hang each optical fiber according to the wavelength Location of requirement; The high precision counterweight is placed on the bare fibre through guide posts, hangs the weight quality by adjusting the quantity that hangs the high precision counterweight, regulating, realize the difference with each optical fiber amount of tension in the fibre.
When 4, inscribing, the ultraviolet light of excimer laser output to the fine exposure of photosensitive tape, realizes inscribing synchronously the grating of different centre wavelengths through phase mask plate.
The method is inscribed grating based on uv-exposure mask plate method, inscribe when can realize multifiber, and the centre wavelength of the grating of inscribing can be adjusted flexibly.In the fiber grating ablation process, if apply different stress at individual light-sensitive optical fibre, then can produce the fiber grating of different centre wavelengths with the same mask plate, and the stress that is applied on the light-sensitive optical fibre is directly proportional with the fiber bragg grating center wavelength deviation value.So the stress that applies in the time of can writing grating processed by accurate control realizes inscribing the different wave length grid.
The present invention compared with prior art has following advantage:
1, preparation facilities of the present invention is simple in structure, is easy to realize;
2, by being with a fine end to be placed on the array fibre positioning runner, inscribe when realizing the different centre wavelength grating of multifiber;
3, by the particular design to embedded magnet in the high precision counterweight, realized the simple and convenient of operation, and optic fibre force is even, is difficult for injury;
4, be pulled in counterweight on each optical fiber by accurate control, realize that each fiber bragg grating center wavelength is controlled flexibly, and weaken the impact of optical fiber stiction in the V-shaped groove;
5, the array grating dirigibility height of this system preparation, good reproducibility, simple to operation, cost is low, is applicable to the batch production of multi-wavelength grating in the ribbon fiber.
Description of drawings
Fig. 1 is the three-dimensional simplified schematic diagram of Written Device of the present invention;
Fig. 2 is Written Device sectional perspective simplified schematic diagram of the present invention.
Among the figure, 1: excimer laser; 2: phase mask plate; 3: photosensitive tape is fine; 4: be with fine anchor clamps; 5: the array fibre positioning runner; 6: the high precision counterweight.
Embodiment
In the three-dimensional simplified schematic diagram of the device that the multi-wavelength grating is inscribed simultaneously in multicore ribbon fiber illustrated in figures 1 and 2, on the light path of excimer laser, from the close-by examples to those far off be provided with successively the fine interlude of photosensitive tape of the phase mask plate vertical with light path and level.The fine interlude of this photosensitive tape is for removing the bare fibre of whole external packing, and the photosensitive tape of these interlude both sides is fine, and its level one side is fixed on to be with on the fine anchor clamps, and vertical opposite side is free segment.Bare fibre between above-mentioned phase mask plate and vertical photosensitive tape fibre is provided with array fibre positioning runner plate, this array fibre positioning runner plate is provided with and the same number of one group of V-shaped groove of bare fibre, this V-shaped groove is the trough with straight angle of rounding off, they are not contour horizontally, this V-shaped groove horizontal component and in the inner bare fibre of position be identical with the height on the fibre, and the distance between one group of V-shaped groove horizontal component equals bare fibre to each other distance on fibre.Below each V-shaped groove, all establish one with the vertical small column that links to each other of coulisse, i.e. guide posts, the distance between them is greater than the distance between the optical fiber, bare fibre is walked around guide posts.Bare fibre below guide pillar is provided with the high precision counterweight, this high precision counterweight is comprised of two semicolumns, the face that this two semicolumn is relative is inlaid with respectively opposite polarity two blocks of magnet, and there is the V-shaped groove at the axis place of this two semicolumn, and V-shaped groove undersized is in fiber size.Only optical fiber need to be placed in the use procedure between two semicolumns in the V-shaped groove, closing gets final product.
Embodiment 1
Excimer laser and phase mask plate are set.4 core ribbon fiber levels, one side is fixed on is with on the fine anchor clamps, make ribbon fiber consistent with excimer laser and phase mask plate height.Separate the interlude bare fibre of removing whole external packing, by placing highly respectively V-shaped groove corresponding to array fibre positioning runner plate.Adjust the position of array fibre positioning runner plate, make all maintenance levels of each bare fibre and be consistent with the phase mask plate distance.
Determine the fiber bragg grating center wavelength drift value and hang counterbalance mass between linear relationship
, wherein,
Be wavelength shift,
Be the wave length shift coefficient, for standard single-mode fiber G.652
,
Be counterbalance mass.The counterbalance mass that should hang each optical fiber according to the wavelength Location of requirement hangs the high precision counterweight of 59.88g, 119.76g, 179.64g, 239.52g successively at each optical fiber; Realization is with the difference of each optical fiber amount of tension in the fibre.During inscription, the ultraviolet light of ArF excimer laser output exposes to photosensitive tape is fine through phase mask plate, setting wavelength such as the phase mask plate is 1545nm, then can inscribe out the grating array of different centre wavelengths (1546nm, 1547nm, 1548nm, 1549nm).
Claims (5)
1. the device that the multi-wavelength grating is inscribed simultaneously in the multicore ribbon fiber, it is characterized in that: the photosensitive tape that from the close-by examples to those far off is provided with successively the phase mask plate vertical with light path and level on the light path of excimer laser is fine, the fine interlude of this photosensitive tape is for removing the bare fibre of whole external packing, the photosensitive tape of these interlude both sides is fine, its level one side is fixed on to be with on the fine anchor clamps, vertical opposite side is free segment, bare fibre between above-mentioned phase mask plate and vertical photosensitive tape fibre is provided with array fibre positioning runner plate, this array fibre positioning runner plate is provided with and the same number of one group of V-shaped groove of bare fibre, this V-shaped groove is the trough with straight angle of rounding off, they are not contour horizontally, this V-shaped groove horizontal component and in the inner bare fibre of position are identical with the height on the fibre, and the distance between one group of V-shaped groove horizontal component equals bare fibre to each other distance on fibre, below each V-shaped groove, all establish one with the vertical guide posts that links to each other of coulisse, distance between them is greater than the distance between the optical fiber, bare fibre is walked around guide posts, and the bare fibre below guide pillar is provided with the high precision counterweight.
2. the method that the multi-wavelength grating is inscribed simultaneously in the multicore ribbon fiber is characterized in that:
1), excimer laser and phase mask plate are set, ribbon fiber level one side is fixed on is with on the fine anchor clamps, make ribbon fiber consistent with excimer laser and phase mask plate height;
2), separate the interlude bare fibre of removing whole external packing, by placing highly respectively V-shaped groove corresponding to array fibre positioning runner plate, adjust the position of array fibre positioning runner plate, make all maintenance levels of each bare fibre and be consistent with the phase mask plate distance;
3), determine the fiber bragg grating center wavelength drift value and hang counterbalance mass between linear relationship
, wherein,
Be wavelength shift,
Be the wave length shift coefficient, for standard single-mode fiber G.652
,
Be counterbalance mass, the counterbalance mass that should hang each optical fiber according to the wavelength Location of requirement; The high precision counterweight is placed on the bare fibre through guide posts;
4), when inscribing, the ultraviolet light of excimer laser output to the fine exposure of photosensitive tape, realizes inscribing synchronously the grating of different centre wavelengths through phase mask plate.
3. the device that the multi-wavelength grating is inscribed simultaneously in the multicore ribbon fiber according to claim 1 is characterized in that: the high precision counterweight is comprised of two semicolumns, and the face that this two semicolumn is relative is inlaid with respectively opposite polarity two blocks of magnet.
4. the device that the multi-wavelength grating is inscribed simultaneously in the multicore ribbon fiber according to claim 3 is characterized in that: there is the V-shaped groove at the axis place of this two semicolumn, and V-shaped groove undersized is in fiber size.
5. the device and method that the multi-wavelength grating is inscribed simultaneously in the multicore ribbon fiber according to claim 1, array fibre positioning runner (5) is characterised in that, in the V-shaped groove by each optical fiber of high separation and respectively placement correspondence, the V-shaped rooved face is smooth, each optical fiber spacing is identical in vertical range between each V-shaped groove and the photosensitive tape fine (3), guarantees the equal keeping parallelism of each optical fiber and is consistent with phase mask plate (2) distance.
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| CN201210516980.1A CN103048728B (en) | 2012-12-06 | 2012-12-06 | Device and method for simultaneously inscribing by multi-wavelength grating in multi-core banding optical fiber |
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| CN201210516980.1A CN103048728B (en) | 2012-12-06 | 2012-12-06 | Device and method for simultaneously inscribing by multi-wavelength grating in multi-core banding optical fiber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459875A (en) * | 2014-12-19 | 2015-03-25 | 中国科学院上海光学精密机械研究所 | Automatic phase mask plate switching device |
| 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 |
| CN114185129A (en) * | 2022-02-15 | 2022-03-15 | 深圳奥斯诺导航科技有限公司 | Method for writing inclined grating polarization filter |
Citations (2)
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| US20080310789A1 (en) * | 2003-03-21 | 2008-12-18 | Mihailov Stephen J | Method of Changing the Birefringence of an Optical Waveguide by Laser Modification of the Cladding |
| CN102998740A (en) * | 2012-11-30 | 2013-03-27 | 燕山大学 | Device and method for simultaneously inscribing multi-wavelength array gratings in ribbon fiber |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080310789A1 (en) * | 2003-03-21 | 2008-12-18 | Mihailov Stephen J | Method of Changing the Birefringence of an Optical Waveguide by Laser Modification of the Cladding |
| CN102998740A (en) * | 2012-11-30 | 2013-03-27 | 燕山大学 | Device and method for simultaneously inscribing multi-wavelength array gratings in ribbon fiber |
Non-Patent Citations (3)
| Title |
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| 刘学静: "光子晶体光纤光栅及其在激光器中的应用", 《激光与光电子学进展》 * |
| 田高洁 等: "碳纤维复合材料封装光纤Bragg光栅", 《DAM AND SAFETY》 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459875A (en) * | 2014-12-19 | 2015-03-25 | 中国科学院上海光学精密机械研究所 | Automatic phase mask plate switching device |
| CN104459875B (en) * | 2014-12-19 | 2017-04-05 | 中国科学院上海光学精密机械研究所 | Phase mask plate automatic switching control equipment |
| 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 |
| CN114185129A (en) * | 2022-02-15 | 2022-03-15 | 深圳奥斯诺导航科技有限公司 | Method for writing inclined grating polarization filter |
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