CN105016615B - A kind of manufacturing method of the small stressed zone bow-tie fiber prefabricated rods for torsion - Google Patents
A kind of manufacturing method of the small stressed zone bow-tie fiber prefabricated rods for torsion Download PDFInfo
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- CN105016615B CN105016615B CN201410166207.6A CN201410166207A CN105016615B CN 105016615 B CN105016615 B CN 105016615B CN 201410166207 A CN201410166207 A CN 201410166207A CN 105016615 B CN105016615 B CN 105016615B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
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Abstract
The invention discloses a kind of manufacturing methods of small stressed zone bow-tie fiber prefabricated rods for torsion, it is characterized in that preform is made of modified chemical vapor deposition process (MCVD) (MCVD), compared with traditional bow-tie fiber prefabricated rods, its stressed zone area is smaller, solves the problems, such as that prefabricated rods are easy to burst in subsequent processing；Prefabricated rods endodermis is relatively large in diameter, and is solved the problems, such as that sandwich layer ovality is big, is also reduced fibre loss；Casing layer is added outside prefabricated rods, solves the problems, such as prefabricated rods quartz volatilization and windrow in twist process.Operation of the present invention difficulty is lower, and prefabricated rods obtained are suitable for grinding and polishing under torsion at high temperature or room temperature, is the committed step for manufacturing circular birefringent fiber.
Description
Technical field
It is that manufacture circle is double the present invention relates to a kind of manufacturing method of small stressed zone bow-tie fiber prefabricated rods for torsion
Reflect the committed step of optical fiber.
Background technique
In recent years, all-fiber current transformator with its dynamic range big, bandwidth, flexible for installation, anti-electromagnetic interference capability
By force, can test cross direct current signal the advantages that, become the development trend of novel current transformer.Due to being basic with Faraday effect
The all-fiber current transformator of principle is equally sensitive to the linear birefrigence in Fibre Optical Sensor ring, this makes low linear birefrigence light
Fibre becomes the core element of all-fiber current transformator.
The low linear birefringent fiber of original adoption is reversed by general single mode fiber, and specific manufacturing method is also divided
Not in the Chinese patent of Publication No. CN 1663922《The optical fiber producing apparatus and method of spin fiber pre-shaped during drawing》, award
Weigh the Chinese patent that notification number is CN 201857345《Optical fiber twisting device》, Publication No. CN 1472153 Chinese patent
《The manufacturing method of low polarisation mode dispersion single mode optical fiber and the optical fiber prepared with this method》It proposes, specific method is all in wire drawing
Prefabricated rods either rubbing optical fiber is rotated in journey to realize torsion.As people go deep into all-fiber current transformator research,
Gradually there is bending resistance is poor, impact resistance is poor, temperature stability is weak etc. in the low linear birefringent fiber of discovery tradition
Disadvantage, and another low linear birefringent fiber with stressed zone is also known as circular birefringent fiber and enters the people visual field, this light
Fibre introduces a large amount of circular brief-ringence to inhibit residuary linear birefringence, so that fiber optic loop has very strong external interference resistance.
No. 92113821.0 Chinese patent《Keep the optical fiber and its preparation method of circular polarization state》In give circular birefringent fiber
Essential structure：With one or more stressed zones along the spiral distribution of fiber axis in covering.Production circular brief-ringence can cover
The method of prefabricated rods either rubbing optical fiber is rotated in drawing process with front, but there are some problems for these methods：1, by
Generally 8mm is required in circular birefringent fiber screw pitch hereinafter, and in order to keep mechanical strength drawing speed to must be maintained at 30m/min
More than, prefabricated rods revolving speed or rubbing speed need to reach 3500r/min or more at this time, this is far beyond the normal operation model of machine
It encloses；2, rotation can be such that optical fiber swings in drawing process, and phenomena such as coating is irregular occurs.
The Chinese patent of application publication number CN 102442774《The manufacturing method and circumgyration stretch of ultra-low birefringence fiber
Tower》It proposes the method for prefabricated rods circumgyration stretch, this method can be applied to the torsion of general single mode fiber prefabricated rods well
In turning, but there are following some problems for the torsion of bow-tie type prefabricated rods：1, traditional bow-tie type prefabricated rods stressed zone area accounts for
10% or more total sectional area, prefabricated rods are easy to burst in subsequent processing；2, traditional bow-tie fiber fibre core ovality is high
Up to 28% or more, if spin fiber is made, it is unevenly distributed to will cause core diameter, and then influence fiber cut off wavelength, mode field diameter
Etc. multiple indexs, while there is also the problems with other fiber couplings difficulty；3, torsion is to carry out at high temperature, and quartz can not
The generation volatilization and windrow phenomenon avoided, this can seriously destroy the exodermis even stressed zone of prefabricated rods.
Summary of the invention
The present invention provides a kind of manufacturing method of small stressed zone bow-tie fiber prefabricated rods for torsion, including it is prefabricated
Stick production and prefabricated rods casing step will especially solve what traditional bow-tie type prefabricated rods were easy to burst in subsequent processing
Quartz volatilization and the problem of windrow when problem, traditional bow-tie type preform core ovality higher problem and torsion.
The technical scheme adopted by the invention is that：
1, prefabricated rods production uses modified chemical vapor deposition process (MCVD) (MCVD), compared with traditional bow-tie type prefabricated rods,
When deposition stress layer, reduces every layer of inlet amount and reduce certain number of plies；When depositing endodermis, every layer of inlet amount is increased
And increase certain number of plies.
2, after prefabricated rods are made, by prefabricated rods with quartz ampoule along axial concentric placement, along axial heating on MCVD lathe
The prefabricated rods with casing layer are made in collapsing.
Compared with prior art, the beneficial effects of the invention are as follows：
1, the 3~7% of the section gross area is accounted for using the preceding stressed zone area of prefabricated rods casing made of the present invention, makes prefabricated rods
It is not easy to burst in subsequent processing.
2, while stressed zone area reduces, endodermis diameter is increased, the benefit done so has：It (1) can be effective
Reduce collapsing during influence of the stressed zone to sandwich layer ovality, using the present invention can make fibre core ovality be down to 3% hereinafter,
The standard of general single mode fiber is reached；(2) Intrinsic Gettering for reducing stressed zone dopant material, reduces fibre loss.
3, the benefit that casing layer is added outside prefabricated rods has：(1) prefabricated rods waving in high temperature twist process is solved
Hair and windrow problem, allow volatilization and windrow that the structural integrity that ensure that original prefabricated rods in casing layer all occurs；(2) further
The percentage that stressed zone area accounts for the section gross area is reduced, the problem of bursting is fully solved.
4, had using beneficial effect of the prefabricated rods produced by the present invention to final circular birefringent fiber：(1) light can be improved
Fine mechanical performance；(2) can make optical fiber easily with other fiber couplings；(3) manufacture difficulty of optical fiber can be reduced, finished product is improved
Rate.
Detailed description of the invention
Fig. 1 is the small stressed zone bow-tie fiber prefabricated rods schematic cross-section with casing layer.
Fig. 2 is the small stressed zone bow-tie fiber prefabricated rods production flow diagram with casing layer.
Figure center core layer -1, endodermis -2, stressed zone -3, exodermis -4, casing layer -5
Specific embodiment
The following further describes the present invention with reference to the drawings.
With the small stressed zone bow-tie fiber prefabricated rods section of casing layer as shown in Figure 1, its structure is successively from inside to outside
Sandwich layer, endodermis, stressed zone, exodermis, casing layer.
The production of small stressed zone bow-tie fiber prefabricated rods with casing layer is carried out on MCVD lathe, specific to walk
Suddenly as shown in Fig. 2, including：
1, bushing pipe is connect with skirt and tail pipe on MCVD lathe respectively, and inside and outside polishing treatment is carried out to bushing pipe.
2, normal sedimentation exodermis.
3, deposition stress layer, the inlet amount of every layer of stressor layers it is few compared with traditional bow-tie fiber prefabricated rods, and deposit the number of plies
It reduces.
4, etch stressor layers, bushing pipe is stopped operating, immediately below bushing pipe with etching lamp be axially moveable to stressor layers into
Row etching, proof stress layer disconnect；Then bushing pipe is rotated into 180 ° of etching other ends, guarantees that other end stressor layers disconnect.
5, endodermis is deposited, the inlet amount of every layer of endodermis is more compared with traditional bow-tie fiber prefabricated rods, and deposits the number of plies and increase
Add.
6, normal sedimentation sandwich layer.
7, shrinking and outer throwing processing, the small stressed zone bow-tie fiber prefabricated rods before casing is made are carried out.
8, after quartz ampoule deionized water flushing, pickling, fire are thrown, by one end necking.
9, prefabricated rods are placed in quartz ampoule, one end is fixed with quartz ampoule necking end, and other end workpiece and quartz ampoule are solid
It is fixed, and the concentricity of retention bar pipe.
10, two termination skirts are reapposed on MCVD lathe, are axially moveable heating from one end of necking, are made and have
The small stressed zone bow-tie fiber prefabricated rods of casing layer.
Embodiment 1：
1, in stick step processed, every layer of inlet amount of stressor layers reduces 20%, and the deposition number of plies is 3 layers, every layer of inlet amount of endodermis
Increase by 50%, the deposition number of plies is 3 layers, and it is 11.0mm that optical fiber prefabricating rod outside diameter, which is made, is drawn into the optical fiber that diameter is 79.8 μm, answers
Power area area is 241.3 μm2, account for the 4.8% of the gross area, this accounting can guarantee prefabricated rods reverse at high temperature or room temperature under grind
Throwing will not all be burst；Optical fiber inner end fibre core ovality 1.4%, outer end fibre core ovality 1.3%, the requirement before having reached torsion；
Optical fiber claps a length of 6.67mm in 1310nm wave band, can meet the preceding requirement to polarization property of torsion.
2, in casing step, quartzy rod outside diameter 19mm, wall thickness 2mm, temperature is 2140 ± 5 DEG C, speed is 8mm/min's
Under the conditions of, it is made the prefabricated rod outside diameter 15.9mm with casing layer, internal bright and clean bubble-free, the core concentricity of drawing optic fibre is poor
It is 0.9 μm, concentricity is preferable after casing, and casing layer accounts for total cross-sectional area up to 51.5%, can be used for reversing.
Claims (5)
1. a kind of manufacturing method of the small stressed zone bow-tie fiber prefabricated rods for torsion, it is characterised in that preform
Making step uses modified chemical vapor deposition process (MCVD)（MCVD）, compared with traditional bow-tie fiber prefabricated rods, stressed zone face
Product is smaller, endodermis is relatively large in diameter, and is embodied in front of preform casing and is directly drawn into 80 optical fiber of Φ, fiber cross-sections are answered
Power area area accounts for the 3 ~ 7% of the section gross area, and optical fiber endodermis diameter is 18 ~ 22 μm；And it joined casing outside prefabricated rods
Layer, the quartzy pipe outside diameter for casing are 19 ~ 30mm, and wall thickness is 1 ~ 3mm.
2. a kind of manufacturing method of small stressed zone bow-tie fiber prefabricated rods for torsion according to claim 1,
Outer diameter before being characterized in that preform casing is 11 ~ 20mm.
3. a kind of manufacturing method of small stressed zone bow-tie fiber prefabricated rods for torsion according to claim 1,
It is characterized in that directly being drawn into 80 optical fiber of Φ before preform casing, bat a length of 4 ~ 10mm of the optical fiber in 1310nm wave band.
4. a kind of manufacturing method of small stressed zone bow-tie fiber prefabricated rods for torsion according to claim 1,
It is characterized in that along axis placing prefabricated rods and quartz ampoule with one heart and collapsing, heating temperature is 2140 ± 50 DEG C at high temperature, vehicle
Speed is 5 ~ 10mm/min.
5. a kind of manufacturing method of small stressed zone bow-tie fiber prefabricated rods for torsion according to claim 1,
It is characterized in that the prefabricated rod outside diameter with casing layer is 15 ~ 25mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410166207.6A CN105016615B (en) | 2014-04-24 | 2014-04-24 | A kind of manufacturing method of the small stressed zone bow-tie fiber prefabricated rods for torsion |
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| CN201410166207.6A CN105016615B (en) | 2014-04-24 | 2014-04-24 | A kind of manufacturing method of the small stressed zone bow-tie fiber prefabricated rods for torsion |
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| CN105016615B true CN105016615B (en) | 2018-11-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105866880B (en) * | 2016-06-14 | 2018-12-28 | 烽火通信科技股份有限公司 | A kind of preparation method of polarization maintaining optical fibre |
| CN106199827A (en) * | 2016-07-27 | 2016-12-07 | 武汉长盈通光电技术有限公司 | A kind of oval core panda type polarization-preserving fiber and preparation method thereof |
| CN110954987A (en) * | 2019-12-05 | 2020-04-03 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | Elliptical core-bow-tie type single-polarization structure optical fiber and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1395523B1 (en) * | 2001-05-30 | 2004-12-15 | 3M Innovative Properties Company | Optical waveguide article including a fluorine-containing zone |
| CN102295407A (en) * | 2010-06-25 | 2011-12-28 | 北京玻璃研究院 | Manufacturing method of polarization maintaining optical fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001342032A (en) * | 2000-05-29 | 2001-12-11 | Fujikura Ltd | Method of manufacturing optical fiber preform by dipping process and injection plug |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1395523B1 (en) * | 2001-05-30 | 2004-12-15 | 3M Innovative Properties Company | Optical waveguide article including a fluorine-containing zone |
| CN102295407A (en) * | 2010-06-25 | 2011-12-28 | 北京玻璃研究院 | Manufacturing method of polarization maintaining optical fiber |
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Address after: 101111 No.7 juer Hutong, Dongcheng District, Beijing Patentee after: Beijing Yiqing Research Institute Co.,Ltd. Address before: 101111 No.7 juer Hutong, Dongcheng District, Beijing Patentee before: BEIJING INDUSTRIAL TECHNOLOGY Research Institute |
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Effective date of registration: 20230217 Address after: 101111 No.5 Xingguang 4th Street, optical Mechatronics industrial base, Zhongguancun Science Park, Tongzhou District, Beijing Patentee after: Beijing Glass Research Institute Co.,Ltd. Patentee after: Beijing Yiqing Research Institute Co.,Ltd. Address before: 101111 No.7 juer Hutong, Dongcheng District, Beijing Patentee before: Beijing Yiqing Research Institute Co.,Ltd. |