CN103616742B - Method for fabricating chirped fiber grating - Google Patents
Method for fabricating chirped fiber grating Download PDFInfo
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- CN103616742B CN103616742B CN201310670826.4A CN201310670826A CN103616742B CN 103616742 B CN103616742 B CN 103616742B CN 201310670826 A CN201310670826 A CN 201310670826A CN 103616742 B CN103616742 B CN 103616742B
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Abstract
The invention relates to a method for fabricating a chirped fiber grating. A fiber grating with a uniform cycle is encapsulated by adopting a polymer; non-uniform stress distribution changing along the axial direction is formed on the internal part of the polymer by the measures such as high-temperature solidification, room-temperature solidification, low-temperature aging and the like in the fabrication process. The non-uniform stress is applied to the uniform cycle fiber grating so as to generate strain in axial non-uniform cycle distribution, and also simultaneously generate an effective refractive index in the non-uniform cycle distribution, so that the chirped fiber grating is fabricated. Meanwhile, the naked fiber in a fiber grating lattice is encapsulated through the polymer in the fabrication process; the prepared chirped fiber grating does not include a naked fiber area, and great convenience is supplied for practical application of the chirped fiber grating. Therefore, the method has important application value in the field of fabrication of the chirped fiber grating.
Description
Technical field
The invention belongs to Fabrication Methods of Fiber Gratings field, be specifically related to a kind of method for making of chirped fiber grating.
Background technology
Chirped fiber grating is a kind of important fiber optics device components and parts.The grid cycle of chirped fiber grating or effective refractive index are uneven, and cause the difference place reflection wavelength along grating length different, can be used for realizing dispersion compensation, therefore chirped fiber grating has a wide range of applications in optical fiber communication and optical fiber-based optical device.
Chirped fiber grating is generally by two class methods producing principles: the first kind, adopts uneven screen periods, and namely the grid cycle of fiber grating is with length variations; Equations of The Second Kind, adopts uneven effective refractive index, and namely the grid cycle of fiber grating is uniform, but the effective refractive index depth of modulation of waveguide medium in grid cycle is with length variations.Current chirped fiber grating method for making has: Re-exposing method, bending method, slant optical fiber method, tapered optical fiber meridional stress method, tapered fibre core method, temperature gradient method, compound chirp grating method etc.But for chirped fiber grating, these method for makings are complicated, and manufacture craft is hard to tackle.In addition, usual chirped fiber grating needs to remove fibre cladding in manufacturing process, cause making complete chirped fiber grating and there is naked fibre in grid region, cause frangible in actual use, it is very inconvenient to use, all these problems be all restriction chirped fiber grating development and application must faced by problem.
Summary of the invention
The object of the present invention is to provide a kind of method for making of chirped fiber grating of novelty, to overcome the deficiency of prior art.
The present invention consider the method for making of uniform period fiber grating and technique comparatively ripe, and it is with low cost, therefore utilize after the method for making of ripe uniform period fiber grating and technique produces uniform period fiber grating, again by polymer encapsulated uniform fiber grating, with the naked fine region of available protecting, simultaneously in polymer encapsulated process, unequal stress polymeric inner being produced change vertically by controlling packaging technology distributes, when this unequal stress puts on uniform period fiber grating, both the strain of axially non-homogeneous period profile had been produced, produce again the equivalent refractive index of non-homogeneous period profile simultaneously, thus achieve being successful of chirped fiber grating.Because this chirped fiber grating does not exist naked fibre, this is that the practical application of chirped fiber grating provides great convenience.
Technical scheme of the present invention comprises the following steps:
Step 1: be that the uniform period fiber grating (1) of L is connected with spectrometer (11) with fiber coupler (10), wideband light source (12) by naked for existing grid zone fine length, and measure the reflectance spectrum centre wavelength numerical value W of this fiber grating (1) under free straight configuration;
Step 2: according to naked fine length L, makes with metallic aluminium the cylindrical body mould (3) that a length is 1.5L, internal diameter is 10 ~ 15mm, has again the treadmill (4) of through hole at arranging center, cylindrical body mould (3) two ends; And with metallic aluminium make a length be 4L, wide be the fixed flat planar (5) of 80 ~ 100mm, cylindrical body mould (3) is fixed on fixed flat planar (5);
Step 3: by the central through hole of fiber grating described in step 1 (1) through treadmill (4), and be positioned at the shaft centre line of cylindrical body mould (3), and fixed flat planar (5) is fixed on by optical fiber stationary fixture (6) in fiber grating (1) one end, fiber grating (1) other end is fixed on fixed flat planar (5) by screw-thread micrometer (7);
Step 4: regulate described screw-thread micrometer (7) to pull fiber grating (1) to apply tension force to it to both sides, and with the reflection peak centre wavelength of spectrometer (11) Real-Time Monitoring fiber grating (1); When spectrometer (11) detects the large 10-4 of W numerical value described in reflection peak centre wavelength numeric ratio step 1, screw-thread micrometer (7) stops stretching, and the optical fiber after then stretching by optical fiber stationary fixture (13) is fixing, then removes screw-thread micrometer (7);
Step 5: by polymkeric substance and corresponding hardening agent in proportion 10:1 join glue and be heated to molten condition, and the eliminating bubble that stirs in heating process; Then the polymkeric substance of described molten condition is slowly poured in above-mentioned cylindrical body mould (3), to being full of mould completely;
Step 6: fixed flat planar (5) is put into the hot setting that incubator carries out 80-100 degree, the hot setting time is 1-2 hour; From incubator, take out fixed flat planar (5) after hot setting terminates, removed by optical fiber stationary fixture (6), be placed on cured at room temperature, the cold curing time is 1-2 hour;
Step 7: fixed flat planar (5) is put into the low temperature aging that incubator carries out 50-60 degree, digestion time is at 10-15 hour, low temperature aging terminates rear taking-up fixed flat planar (5), disconnect optical fiber pad 9, remove optical fiber stationary fixture (13), die sinking also takes out the fiber grating (1) after encapsulating, and namely obtains chirped fiber grating.
The uniform period fiber grating (1) of described step 1 is Fiber Bragg Grating FBG.
The described polymkeric substance of described step 5 is epoxy polyurethane, and described hardening agent is isocyanate curing agent.
Described step 3 and 4 optical fiber stationary fixture (6), optical fiber stationary fixture (13) and and be fixedly connected with between screw-thread micrometer (7) with stationary platform (5).
In above-mentioned steps 5 to 7 process, spectrometer (11) and wideband light source (12) power up work, the reflection peak data of Real-Time Monitoring fiber grating (1), to guarantee that in encapsulation process, fiber grating reflection spectral line is normal, prevents the unexpected forced breakage of fiber grating.
The present invention is not omnidistance to fiber grating applying tension force in manufacturing process, only applies tension force in the hot setting stage to fiber grating, polymkeric substance is converted to by molten condition solid-state; Then the tension force release at fiber grating two ends will be applied in the cold curing stage, the temperature contrast of high temperature and room temperature produces stress at polymeric inner, and along fiber axis to non-homogeneous mechanical periodicity, both produce the strain of axially non-homogeneous period profile, produce the equivalent refractive index of non-homogeneous period profile simultaneously; Then by low temperature aging measure, this polymeric inner stress is consolidated, thus made chirped fiber grating.
The present invention obtains chirped fiber grating by the method for polymer encapsulated uniform period fiber grating, simultaneously by encapsulating the available protecting provided naked fine region.Because the manufacture craft of uniform period fiber grating is full-fledged, with low cost, thus greatly provide convenient to making chirped fiber grating.
Below in conjunction with drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is manufacturing process equipment therefor schematic diagram of the present invention.
Fig. 2 is the reflection spectrogram of uniform period fiber grating before polymer encapsulated.
Fig. 3 is the reflection spectrogram of the chirped fiber grating that the present invention makes.
In figure, 1. fiber grating, 2. polymkeric substance, 3. cylindrical body mould, 4. treadmill, 5. fixed flat planar, 6. stationary fixture, 7. screw-thread micrometer, 8. tail optical fiber, 9. fusion point, 10. fiber coupler, 11. spectrometers, 12. wideband light sources, 13. stationary fixtures, 14. tail optical fibers.
Embodiment
Embodiment
As shown in Figure 1, the step of the method comprises the present embodiment manufacturing process equipment therefor:
Step 1: adopt conventional phase-mask method to make a bragg grating, the length measuring this bragg grating grid Luo Xian district after making is 30mm; The tail optical fiber (8) of above-mentioned fiber grating (1) is connected with spectrometer (11) with fiber coupler (10), wideband light source (12) at optical fiber fusion welding point (9) place; After connecting, wideband light source (12) and spectrometer (11) power up work, and measure the reflection spectrogram of this bragg grating (1) under free straight configuration, as shown in Figure 2, its reflection peak centre wavelength numerical value is 1549.936nm to result.
Step 2: make the cylindrical body mould (3) that a length is 45mm, internal diameter is Φ 12mm with metallic aluminium.These cylindrical body mould (3) two ends are provided with the treadmill (4) of center Φ 1.0mm through hole, and this treadmill (4) is fixed on cylindrical body mould (3) two ends by screw; Making a length with metallic aluminium etc. is again 120mm, the wide fixed flat planar (5) for 90mm, is fixed on fixed flat planar (5) by cylindrical body mould (3).
Step 3: the center above-mentioned fiber grating (1) being fixed on cylindrical body mould (3) through the central through hole of treadmill (4), fixed flat planar (5) is fixed on by optical fiber stationary fixture (6) in fiber grating (1) one end, and fiber grating (1) other end is fixed on fixed flat planar (5) by screw-thread micrometer (7).
Step 4: adjustable screw micrometer (7) pulls fiber grating (1) to apply tension force to it, the reflection peak centre wavelength of spectrometer (11) Real-Time Monitoring fiber grating (1) to both sides.When spectrometer (11) detects that reflection peak centre wavelength numerical value is 1550.091nm, screw-thread micrometer (7) stops stretching, and the optical fiber after stretching by optical fiber stationary fixture (13) is fixing, then removes screw-thread micrometer (7).
Step 5: epoxy polyurethane material and isocyanate curing agent are joined glue in 10:1 ratio and is heated to molten condition, stir eliminating bubble in heating process, also can adopt vacuum pump to absorb bubble further.Then slowly pour in above-mentioned mould by the polyurethane material of described molten condition, be full of cylindrical body mould (3) completely, casting process is wanted slowly, to prevent bubble formation.
Step 6: fixed flat planar (5) is put into together with the cylindrical body mould (3) etc. be fixed thereon the hot setting that incubator carries out 90 degree, and the hot setting time is 2 hours; From incubator, take out fixed flat planar (5) after hot setting terminates, removed by optical fiber stationary fixture (6), be placed on the cured at room temperature that temperature is 18 degree, the cold curing time is 2 hours.
Step 7: again fixed flat planar (5) is put into the low temperature aging that incubator carries out 60 degree, the reflectance spectrum data of spectrometer (11) Real-Time Monitoring fiber grating (1) together with the cylindrical body mould (3) etc. be fixed thereon, the low temperature aging time is 12 hours.Low temperature aging terminates rear disconnection optical fiber pad 9, removes optical fiber stationary fixture (13), and die sinking also takes out the fiber grating after encapsulating, and namely obtains chirped fiber grating.
The reflectance spectrum data of the chirped fiber grating that the present embodiment makes as shown in Figure 3, can realize the dispersion compensation of different wave length.There is not naked fine region in the chirped fiber grating that the present embodiment completes, for the practical application of chirped fiber grating provides great convenience.
Although describe the present invention in detail with reference to above-described embodiment, should be appreciated that the present invention is not limited to the disclosed embodiments, for the technician of this professional domain, various change can be carried out to its form and details.
Claims (4)
1. a method for making for chirped fiber grating, is characterized in that, the step of the method is as follows:
Step 1: be that the uniform period fiber grating (1) of L is connected with spectrometer (11) with fiber coupler (10), wideband light source (12) by naked for existing grid zone fine length, and measure the reflectance spectrum centre wavelength numerical value W of this fiber grating (1) under free straight configuration;
Step 2: according to naked fine length L, makes with metallic aluminium the cylindrical body mould (3) that a length is 1.5L, internal diameter is 10 ~ 15mm, has again the treadmill (4) of through hole at arranging center, cylindrical body mould (3) two ends; And with metallic aluminium make a length be 4L, wide be the fixed flat planar (5) of 80 ~ 100mm, above-mentioned cylindrical body mould (3) is fixed on fixed flat planar (5);
Step 3: by the central through hole of fiber grating described in step 1 (1) through treadmill (4), and be positioned at the shaft centre line of cylindrical body mould (3), and fixed flat planar (5) is fixed on by optical fiber stationary fixture (6) in fiber grating (1) one end, fiber grating (1) other end is fixed on fixed flat planar (5) by screw-thread micrometer (7);
Step 4: regulate described screw-thread micrometer (7) to pull fiber grating (1) to apply tension force to it to both sides, and with the reflection peak centre wavelength of spectrometer (11) Real-Time Monitoring fiber grating (1); When spectrometer (11) detects W numerical value large 10 described in reflection peak centre wavelength numeric ratio step 1
-4time, screw-thread micrometer (7) stops stretching, and the optical fiber after then stretching by optical fiber stationary fixture (13) is fixing, then removes screw-thread micrometer (7);
Step 5: by polymkeric substance and corresponding hardening agent in proportion 10:1 join glue and be heated to molten condition, and the eliminating bubble that stirs in heating process; Then the polymkeric substance of described molten condition is slowly poured in above-mentioned cylindrical body mould (3), to being full of mould completely;
Step 6: fixed flat planar (5) is put into the hot setting that incubator carries out 80-100 degree, the hot setting time is 1-2 hour; From incubator, take out fixed flat planar (5) after hot setting terminates, removed by optical fiber stationary fixture (6), be placed on cured at room temperature, the cold curing time is 1-2 hour;
Step 7: fixed flat planar (5) is put into the low temperature aging that incubator carries out 50-60 degree, digestion time is at 10-15 hour, low temperature aging terminates rear taking-up fixed flat planar (5), disconnect optical fiber pad (9), remove optical fiber stationary fixture (13), die sinking also takes out the fiber grating (1) after encapsulating, and namely obtains chirped fiber grating.
2. the method for making of a kind of chirped fiber grating as claimed in claim 1, is characterized in that described uniform period fiber grating (1) is Fiber Bragg Grating FBG.
3. the method for making of a kind of chirped fiber grating as claimed in claim 1, is characterized in that described polymkeric substance is epoxy polyurethane.
4. the method for making of a kind of chirped fiber grating as claimed in claim 1, is characterized in that described hardening agent is isocyanate curing agent.
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| CN201310670826.4A CN103616742B (en) | 2013-12-11 | 2013-12-11 | Method for fabricating chirped fiber grating |
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| CN201310670826.4A CN103616742B (en) | 2013-12-11 | 2013-12-11 | Method for fabricating chirped fiber grating |
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| CN103616742B true CN103616742B (en) | 2015-06-17 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106482760B (en) * | 2015-10-14 | 2018-09-21 | 北京信息科技大学 | A kind of system of all-metal packaged fiber grating strain transducer |
| CN105583484B (en) * | 2015-12-16 | 2017-12-15 | 北京遥测技术研究所 | A kind of fibre optical sensor is without gel packaging system and method |
| CN105973159B (en) * | 2016-05-25 | 2018-08-28 | 中石化石油工程设计有限公司 | A kind of pipeline distributed fiberoptic sensor initial strain control device and its control method |
| CN107687817B (en) * | 2017-07-20 | 2019-11-29 | 北京航天控制仪器研究所 | A kind of miniaturization flexible optical fibre grating strain transducer |
| CN108680289A (en) * | 2018-05-24 | 2018-10-19 | 大连理工大学 | A kind of method that polyurethane encapsulation fiber grating prepares sensor |
| CN110320590B (en) * | 2019-05-17 | 2020-07-31 | 浙江工业大学 | Method for manufacturing mechanically chirped long-period fiber grating |
| CN112068238A (en) * | 2020-09-07 | 2020-12-11 | 桂林电子科技大学 | Single stress element optical fiber chirped fiber Bragg grating and preparation method thereof |
| CN112068237A (en) * | 2020-09-07 | 2020-12-11 | 桂林电子科技大学 | Cascade multi-type grating based on single stress element optical fiber and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397813A (en) * | 2002-08-30 | 2003-02-19 | 清华大学 | Process for preparing high-chip optical fibre raster with controllable transmission (reflection) |
| CN1811503A (en) * | 2006-03-03 | 2006-08-02 | 清华大学 | Method for producing non-linear chirp optical fibre grating for 40 Gb/S optical communication system |
| CN102122023A (en) * | 2011-04-14 | 2011-07-13 | 暨南大学 | Method for manufacturing tunable chirped fiber grating |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397813A (en) * | 2002-08-30 | 2003-02-19 | 清华大学 | Process for preparing high-chip optical fibre raster with controllable transmission (reflection) |
| CN1811503A (en) * | 2006-03-03 | 2006-08-02 | 清华大学 | Method for producing non-linear chirp optical fibre grating for 40 Gb/S optical communication system |
| CN102122023A (en) * | 2011-04-14 | 2011-07-13 | 暨南大学 | Method for manufacturing tunable chirped fiber grating |
Non-Patent Citations (1)
| Title |
|---|
| 非线性二次曝光法制作啁啾光纤Bragg光栅;任秋荣 等;《武汉理工大学学报》;20050531;第27卷(第5期);第15-17页 * |
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