CN112456782B - Preparation method of optical fiber stress rod - Google Patents
Preparation method of optical fiber stress rod Download PDFInfo
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- CN112456782B CN112456782B CN202011330596.3A CN202011330596A CN112456782B CN 112456782 B CN112456782 B CN 112456782B CN 202011330596 A CN202011330596 A CN 202011330596A CN 112456782 B CN112456782 B CN 112456782B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01861—Means for changing or stabilising the diameter or form of tubes or rods
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01876—Means for heating tubes or rods during or immediately prior to deposition, e.g. electric resistance heaters
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Manufacturing & Machinery (AREA)
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention relates to a preparation method of an optical fiber stress rod, which comprises the steps of (1) pretreating a base pipe; (2) depositing stress zone loose bodies on the inner wall of the base pipe: obtaining a doped silicon dioxide loose body on the inner wall of the base tube by vapor deposition; (3) Fusing the base pipe in the step (2) into a stress rod mother rod, wherein the core part of the stress rod mother rod is a doped silica stress area with the diameter of A, the outer layer is a pure silica cladding and the diameter of B; (4) extending the stress bar mother bar: stretching the stress rod mother rod to reduce the diameter until the diameter of the stress area reaches the target diameter a of the stress area; (5) Cutting the length of the stress rod in the step (4) to a target length; (6) And (5) grinding the stress rod in the step (5) to grind the diameter of the outer layer of the stress rod to a target diameter b, wherein b is larger than a. This application can be according to the needs of difference, and stable, nimble, mass production stress stick realizes the diversification of stress stick production specification, satisfies the diversified demand of optic fibre preparation.
Description
Technical Field
The invention relates to a preparation method of an optical fiber rod, in particular to a preparation method of an optical fiber stress rod.
Background
The polarization maintaining optical fiber can ensure that the polarized light keeps the initial polarization state in the transmission process, and especially plays a vital role in the field of optical fiber sensing precision measurement such as an optical fiber gyroscope and the like. The polarization maintaining optical fiber is used for linearly polarized light transmission, is widely applied to various fields of national economy such as aerospace, aviation, navigation, industrial manufacturing technology, communication and the like, and can ensure the linear polarization direction to be unchanged and improve the coherent signal-to-noise ratio in an interference optical fiber sensor based on optical coherent detection so as to realize high-precision measurement of physical quantity; the polarization maintaining fiber is used as a special fiber, is mainly applied to sensors such as fiber optic gyroscopes, fiber optic hydrophones and the like and fiber optic communication systems such as DWDM, EDFA and the like, and is a special fiber type with wide application value.
The polarization maintaining fiber generally includes three types, i.e., a bow tie type polarization maintaining fiber, a panda type polarization maintaining fiber, and an elliptical cladding type polarization maintaining fiber. The panda type polarization maintaining fiber has the most wide application, and the structure of the panda type polarization maintaining fiber comprises a fiber core, a stress area and a cladding part, wherein the fiber core is positioned in the central part of the cladding, and two cylindrical stress areas are distributed on two sides of the fiber core. The core is generally germanium-fluorine co-doped quartz glass, and the stress region is generally B 2 O 3 Doped silica glass and the cladding is typically a pure silica glass material. Since boron quartz has a larger thermal expansion property than pure quartz, the stress region can generate compressive stress to act on the core portion, thereby generating so-called stress birefringence so that the polarization-maintaining fiber has a linear polarization-maintaining property.
The active fiber is an optical fiber capable of generating laser light or having an optical amplification function, and is mainly used for a fiber laser and a fiber amplifier. With the rapid development of the fiber laser radar detection technology, people put higher requirements on the performance of an active fiber laser, and the laser is required to be linearly polarized to output.
In the preparation process of the panda polarization maintaining fiber and the linear polarization active fiber, the manufacture of the stress rod is one of the key steps. The traditional stress rod manufacturing method can only be used for traditional panda polarization maintaining optical fibers, special requirements are required on the diameter and the length of a stress area under the special requirements, and the traditional MCVD and PCVD methods can only stably produce the stress rod with a single specification in batch and cannot adapt to the specification diversification and batch production of the stress rod.
Disclosure of Invention
The invention provides a preparation method for stably, flexibly and massively producing stress rods according to different requirements, realizing the diversification of the production specifications of the stress rods and meeting the diversification requirements of optical fiber preparation.
The technical scheme of the invention is as follows: the preparation method of the optical fiber stress rod comprises the following steps
(1) Base tube pretreatment: preparing a quartz tube as a base tube, and removing impurities and bubbles on the inner wall of the base tube by pickling and preheating the base tube;
(2) Depositing a stress area loose body on the inner wall of the base pipe: obtaining a doped silicon dioxide loose body on the inner wall of the base tube by utilizing vapor deposition;
(3) Fusing the base pipe in the step (2) into a stress rod mother rod, wherein the core part of the stress rod mother rod is a doped silica stress area with the diameter of A, the outer layer is a pure silica cladding and the diameter of B;
(4) Extending the stress bar mother bar: stretching the stress rod mother rod to reduce the diameter until the diameter of the stress area reaches the target diameter a of the stress area;
(5) Cutting the length of the stress rod in the step (4) to a target length;
(6) And (5) grinding the stress rod in the step (5) to grind the diameter of the outer layer of the stress rod to a target diameter b, wherein b is larger than a.
Preferably, the stress region loose body of the step (2) is a boron B-doped silicon dioxide loose body, and the thermal expansion capacity of the stress region is improved by doping B.
Specifically, when the step (2) is implemented, the gas-phase BCl is introduced into the inner wall of the base tube at the same time 3 And SiCl 4 The base tube is heated by oxyhydrogen flame, and B is deposited on the inner wall 2 O 3 The silica agglomerates of (1). Preferably, the boron B is doped in molar concentration according to B 2 O 3 5 to 23mol percent.
Preferably, before the stretching in the step (4), the diameter A of the stress area of the stress rod mother rod is 10-17 mm, and the diameter B of the cladding is 17-25 mm; after the stretching in the step (4), the diameter a of the stress area is 1-15 mm; after the polishing in the step (6), the diameter b of the cladding is 2-17 mm.
Preferably, the vapor deposition of step (2) is selected from MCVD or PCVD.
Preferably, step (5) is carried out by using H as the stress bar 2 /O 2 The flame is cut off according to the required length.
Preferably, step (4) is carried out by welding glass handles to two ends of the stress rod mother rod respectively by a horizontal glass lathe stretcher, and controlling O in flame of the stretcher 2 :H 2 In a ratio of 0.4 to 0.5 2 The flow rate is 50-120sccm, H 2 /O 2 The flame moving speed is 2 mm/min-500 mm/min.
Drawings
FIG. 1 is a flow chart of a method for manufacturing an optical fiber stress bar according to an embodiment of the present invention;
FIG. 2 is a flow chart of the structural change of the optical fiber stress rod in the embodiment of the invention.
Detailed Description
The present invention will be described in further detail below with reference to the attached drawings, which are illustrative and are not to be construed as limiting the invention.
Example 1
And (3) manufacturing a stress rod mother rod by an MCVD (metal chemical vapor deposition) method, wherein the diameter A of a stress region is =11.2mm, the outer diameter B of the rod is =18.5mm, and the doping concentration of B2O3 of the stress region is about 10 mol%. One end of a stress rod on an MCVD lathe is connected with a handle, the handle is clamped on a chuck of a glass extension lathe, and the other end of the stress rod is connected with the handle. The H2/O2 torch preferably has a H2 flow rate of 70sccm, a lampholder moving speed of preferably 10mm/min, and an elongation speed of preferably 21.6mm/min.
Stress area diameter a =6.3mm after extension
The stress rod is cut into required lengths by flame on a glass lathe.
And grinding the divided stress rods to b =7.3mm by using a glass cylindrical grinder.
And (5) manufacturing a stress rod with the final stress area diameter of a =6.3mm and the final stress area diameter of b =7.3mm.
Example 2
A stress rod mother rod is manufactured by an MCVD method, the diameter A of a stress area is =13mm, the outer diameter B of the rod is =20.6mm, and the doping concentration of B2O3 of the stress area is about 15 mol%. One end of a stress rod on an MCVD lathe is connected with a handle, the handle is clamped on a chuck of a glass extension lathe, and the other end of the stress rod is connected with the handle. The H2/O2 torch preferably has a H2 flow rate of 90sccm, a lampholder moving speed of 10mm/min and an extension speed of 23.8mm/min.
Stress area diameter a =11.2mm after extension
The stress rod is cut into required lengths by flame on a glass lathe.
And grinding the divided stress rods to b =12.5mm by using a glass cylindrical grinder.
And (3) manufacturing a stress rod with the final stress zone diameter of a =11.2mm and the b =12.5mm.
Example 3
And (3) manufacturing a stress rod mother rod by an MCVD (metal chemical vapor deposition) method, wherein the diameter A of a stress region is =11.2mm, the outer diameter B of the rod is =18.5mm, and the doping concentration of B2O3 of the stress region is about 22 mol%. One end of a stress rod on an MCVD lathe is connected with a handle, the handle is clamped on a chuck of a glass extension lathe, and the other end of the stress rod is connected with the handle. The H2/O2 torch preferably has a H2 flow rate of 70sccm, a lamp base movement speed of 10mm/min and an elongation speed of 370mm/min.
Stress area diameter a =3mm after extension
The stress rod is cut into required lengths by flame on a glass lathe.
And grinding the divided stress rods to b =5mm by using a glass cylindrical grinder.
And (5) completing the manufacture of a stress rod with the final stress area diameter of a =3mm and b =5mm.
Example 3 and example 1 are stress bar products of different specifications prepared using the same stress bar master bar. Through comparison, the preparation method can realize stable, flexible and batch production of the stress rods according to different requirements, realize the diversification of the production specifications of the stress rods and meet the diversified requirements of optical fiber preparation.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (8)
1. A preparation method of an optical fiber stress rod is characterized by comprising the following steps: comprises the following steps
(1) Base pipe pretreatment: preparing a quartz tube as a base tube, and removing impurities and bubbles on the inner wall of the base tube by pickling and preheating the base tube;
(2) Depositing a stress area loose body on the inner wall of the base pipe: obtaining a doped silicon dioxide loose body on the inner wall of the base tube by vapor deposition;
(3) Fusing the base pipe in the step (2) into a stress rod mother rod, wherein the core part of the stress rod mother rod is a doped silica stress area with the diameter of A, the outer layer is a pure silica cladding and the diameter of B;
(4) Extending the stress bar mother bar: stretching the stress rod mother rod to reduce the diameter until the diameter of the stress area reaches the target diameter a of the stress area;
(5) Cutting the length of the stress rod in the step (4) to a target length;
(6) And (5) grinding the stress rod in the step (5) to grind the diameter of the outer layer of the stress rod to a target diameter b, wherein b is larger than a.
2. The method of making an optical fiber stress bar of claim 1, wherein: and (3) the stress region loose body in the step (2) is a boron B-doped silicon dioxide loose body.
3. The method of making an optical fiber stress rod of claim 2, wherein: when the step (2) is implemented, simultaneously introducing gas phase BCl to the inner wall of the base pipe 3 And SiCl 4 The base tube is heated by oxyhydrogen flame, and B is deposited on the inner wall 2 O 3 The silica agglomerates of (1).
4. The method of making an optical fiber stress rod of claim 2, wherein: boron B in molar concentration B 2 O 3 5 to 23mol percent.
5. The method of making an optical fiber stress bar of claim 1, wherein: before the stretching in the step (4), the diameter A of the stress area of the stress rod mother rod is 10-17 mm, and the diameter B of the cladding is 17-25 mm; after the stretching in the step (4), the diameter a of the stress area is 1-15 mm; after the polishing in the step (6), the diameter b of the cladding is 2-17 mm.
6. The method of making an optical fiber stress rod of claim 1, wherein: the vapor deposition of step (2) is selected from MCVD or PCVD.
7. The method of making an optical fiber stress bar of claim 1, wherein: when the step (5) is implemented, the stress rod adopts H 2 /O 2 The flame is cut off according to the required length.
8. The method of making an optical fiber stress bar of claim 1, wherein: when the step (4) is implemented, the horizontal glass lathe extension machine is used for respectively welding glass handles at two ends of a stress rod mother rod and controlling O in flame of the extension machine 2 :H 2 In a ratio of 0.4 to 0.5 2 The flow rate is 50-120sccm, H 2 /O 2 The flame moving speed is 2 mm/min-500 mm/min.
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| CN202011330596.3A CN112456782B (en) | 2020-11-24 | 2020-11-24 | Preparation method of optical fiber stress rod |
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| CN202011330596.3A CN112456782B (en) | 2020-11-24 | 2020-11-24 | Preparation method of optical fiber stress rod |
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| CN102531378B (en) * | 2012-03-12 | 2014-12-10 | 武汉烽火锐光科技有限公司 | Boron-doped stress bar for manufacturing polarization-preserving fiber and manufacturing method for boron-doped stress bar |
| CN103878649B (en) * | 2014-03-19 | 2017-04-05 | 武汉长盈通光电技术有限公司 | A kind of processing method of fiber stress rod |
| CN111099820B (en) * | 2019-12-30 | 2022-07-05 | 武汉安扬激光技术股份有限公司 | Preparation method of fine stress bar |
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Effective date of registration: 20211102 Address after: 214400 No.278 Chengjiang Middle Road, high tech Zone, Jiangyin City, Wuxi City, Jiangsu Province Applicant after: JIANGSU FASTEN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Address before: No. 165, Chengjiang Middle Road, high tech Zone, Jiangyin City, Wuxi City, Jiangsu Province Applicant before: FASTEN GROUP Co.,Ltd. Applicant before: JIANGSU FASTEN OPTICAL COMMUNICATION TECHNOLOGY Co.,Ltd. Applicant before: JIANGSU FASTEN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
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