CN113998880A - Manufacturing method of core rod, preform rod and optical fiber - Google Patents
Manufacturing method of core rod, preform rod and optical fiber Download PDFInfo
- Publication number
- CN113998880A CN113998880A CN202111170935.0A CN202111170935A CN113998880A CN 113998880 A CN113998880 A CN 113998880A CN 202111170935 A CN202111170935 A CN 202111170935A CN 113998880 A CN113998880 A CN 113998880A
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- rod
- core rod
- conical
- seed
- manufacturing
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000013307 optical fiber Substances 0.000 title claims abstract description 9
- 239000011521 glass Substances 0.000 claims abstract description 44
- 238000000151 deposition Methods 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 230000008021 deposition Effects 0.000 claims abstract description 26
- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 230000004927 fusion Effects 0.000 abstract description 6
- 239000000155 melt Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
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Classifications
-
- 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
- C03B37/01807—Reactant delivery systems, e.g. reactant deposition burners
- C03B37/01815—Reactant deposition burners or deposition heating means
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The application discloses a manufacturing method of a core rod, a prefabricated rod and an optical fiber, wherein the manufacturing method of the core rod comprises the following steps: 1) welding the first auxiliary rod with a seed rod, wherein the lower end of the seed rod is provided with a conical structure meeting the deposition requirement; 2) depositing loose core rod bodies at the lower end of the seed rod; 3) sintering the loose core rod body into a coarse core rod; 4) the thick core rod is welded with the second auxiliary rod; 5) longitudinally extending the thick core rod to obtain a thin core rod; 6) fusing the fine core rod and the seed rod to obtain the seed rod with a conical part; 7) heating the conical part of the seed rod, pressing and melting the conical glass block and the conical part mutually, and pressing and deforming the conical part into a cylindrical part, wherein the conical glass block has a conical structure meeting the deposition requirement. This application is after the seed rod melts, and the butt fusion has the cone glass piece that accords with the cone structure of deposition requirement to can reliably carry out the loose body deposit of next plug, effectively guarantee the deposition quality.
Description
Technical Field
The invention relates to the field of optical fiber preforms, in particular to a core rod manufacturing method, a preform and an optical fiber.
Background
When the core rod is processed, the auxiliary rod and the seed rod are firstly welded, then the seed rod is inserted into a VAD reaction furnace, a reaction blowtorch in the VAD reaction furnace works to carry out deposition reaction, reactant particles are deposited on the seed rod to obtain a core rod loose body, and then the core rod loose body is dried and sintered to obtain a coarse core rod.
In order to facilitate reliable deposition of the particles, the lower end of the seed rod has a tapered portion, and there are specific requirements on the shape (height, angle) of the tapered portion. In the existing processing method, after the processing is finished, the seed rod and the loose body are fused, and the lower end of the fused seed rod forms a new conical part for the next deposition.
Disclosure of Invention
The present invention addresses the above-described problems and provides a method of manufacturing a core rod, a preform, and an optical fiber.
The technical scheme adopted by the invention is as follows:
a method of manufacturing a core rod, comprising the steps of:
1) welding the first auxiliary rod with a seed rod, wherein the lower end of the seed rod is provided with a conical structure meeting the deposition requirement;
2) mounting the first auxiliary rod on a rotary lifting mechanism, and depositing loose core rod bodies at the lower end of the seed rod through a VAD reaction furnace;
3) after the deposition is finished, dewatering the loose core rod body, and sintering the loose core rod body into a coarse core rod;
4) welding a second auxiliary rod at one end of the thick core rod, which is far away from the first auxiliary rod;
5) longitudinally extending the thick core rod to obtain a thin core rod;
6) after the longitudinal extension is finished, fusing the thin core rod and the seed rod to obtain the seed rod with a conical part;
7) and heating the conical part of the seed rod, pressing and melting a conical glass block and the conical part mutually, and pressing and deforming the conical part into a cylindrical part, wherein the conical glass block has a conical structure meeting the deposition requirement, and the conical glass block, the cylindrical part and the seed rod form a new seed rod for performing the next deposition of loose core rod bodies.
This application is after kind stick fuse, and the butt fusion has the taper glass piece that accords with the taper structure of deposition requirement to the taper glass piece that obtains, cylindrical portion and kind stick form into new kind stick, can be used for reliably carrying on the next loose body deposit of plug, effectively guarantee deposition quality.
In one embodiment of the present invention, the tapered structure includes a flat bottom surface and a tapered sidewall.
In one embodiment of the present invention, the steps 5) to 7) are performed by an extension welding apparatus, wherein the extension welding apparatus includes:
the heating furnace is used for heating the coarse core rod;
the upper rotating seat is positioned above the heating furnace and used for limiting the first auxiliary rod and driving the first auxiliary rod to rotate and move up and down;
the lower swivel base is positioned below the heating furnace and used for limiting the second auxiliary rod and driving the second auxiliary rod to rotate and move up and down;
a torch assembly which can move up and down and is used for fusing the fine core rod and the seed rod and heating the conical part to weld the conical part and the conical glass block together;
the rotary clamping seat can move horizontally, the rotary clamping seat is positioned between the upper rotary seat and the heating furnace, the rotary clamping seat is provided with a first working position and a second working position, the axis of the rotary clamping seat is overlapped with the axis of the upper rotary seat in the first working position, the rotary clamping seat is far away from the upper rotary seat in the second working position, and the upper rotary seat moves up and down without interfering with the rotary clamping seat;
and the telescopic element is used for driving the rotary clamping seat to horizontally move and switch between a first working position and a second working position.
One form of operation of the stretch fusion apparatus: mounting the first auxiliary rod on an upper rotary seat, moving an upper rotary seat downwards to enable a second auxiliary rod to pass through the heating furnace, moving a lower rotary seat upwards, and mounting the second auxiliary rod on a lower rotary seat; the heating furnace works to heat the coarse core rod, the upper rotary seat and the lower rotary seat drive the first auxiliary rod, the coarse core rod and the second auxiliary rod to synchronously rotate, and the upper rotary seat and the lower rotary seat are far away from each other to longitudinally delay the coarse core rod; after the longitudinal extension is completed, the blowtorch component moves to between the seed rod and the thin core rod, the flame is sprayed to fuse the thin core rod and the seed rod, the lower end of the seed rod forms a conical part, the upper rotary seat moves upwards, the telescopic element works to drive the rotary clamping seat to move to a first working position, the conical glass block is installed on the rotary clamping seat, the blowtorch component sprays flame to heat the conical part and the conical glass block, the upper rotary seat and the rotary clamping seat rotate at the same speed, the upper rotary seat moves downwards to enable the conical glass block and the conical part to be mutually compressed and fused, the conical part is pressed and deformed into a cylindrical part, the conical glass block, the cylindrical part and the seed rod form a new seed rod, the telescopic element resets, and the rotary clamping seat is switched to a second working position.
In one embodiment of the present invention, the glass fixture further includes a clamping tool, the clamping tool is installed on the rotating clamping seat and is driven by the rotating clamping seat to rotate, the upper surface of the clamping tool has a tapered groove with a wide upper part and a narrow lower part, and the tapered groove is used for installing the tapered glass block.
The tapered groove is arranged to conveniently limit the tapered glass block.
In one embodiment of the present invention, the clamping tool is made of glass.
In one embodiment of the present invention, the height of the tapered glass block is greater than the depth of the tapered groove. The clamping tool can be prevented from being melted by flame heating, and the service life of the clamping tool is influenced.
In one embodiment of the present invention, the telescopic element is a cylinder, a hydraulic cylinder or an electric push rod.
In one embodiment of the present invention, the torch assembly includes a torch and a pushing element capable of driving the torch to move horizontally, and the pushing element is an air cylinder or an electric push rod.
The application also discloses a prefabricated stick, the prefabricated stick loose body is deposited out at the outer layer of plug, carries out sintering to prefabricated stick loose body, obtains prefabricated stick, the plug is the plug that the manufacturing method of above plug made.
The application also discloses an optical fiber obtained by drawing the above preform.
The invention has the beneficial effects that: this application is after kind stick fuse, and the butt fusion has the taper glass piece that accords with the taper structure of deposition requirement to the taper glass piece that obtains, cylindrical portion and kind stick form into new kind stick, can be used for reliably carrying on the next loose body deposit of plug, effectively guarantee deposition quality.
Description of the drawings:
FIG. 1 is a schematic illustration of a VAD reactor deposition core rod loose mass;
FIG. 2 is a schematic view of a first auxiliary bar and a seed bar;
FIG. 3 is a schematic view of a thick core rod;
FIG. 4 is a schematic view of a thick core rod after welding a second auxiliary rod;
FIG. 5 is a schematic view of an extension welding apparatus;
FIG. 6 is a schematic view of another state of the extension welding apparatus;
FIG. 7 is a schematic view of a tapered glass block, a cylindrical portion, a seed rod, and a first auxiliary rod.
The figures are numbered:
1. a first auxiliary bar; 2. seed rods; 3. a rotary lifting mechanism; 4. VAD reaction furnace; 5. a loose core rod body; 6. a coarse core rod; 7. a fine core rod; 8. a tapered portion; 9. a tapered glass block; 10. a cylindrical portion; 11. heating furnace; 12. rotating the rotary base upwards; 13. a lower rotary seat; 14. a torch assembly; 15. rotating the card holder; 16. a telescopic element; 17. a clamping tool; 18. a tapered groove; 19. a blowtorch; 20. a pushing element; 21. a second auxiliary bar; 22. a cone-shaped structure.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 7, a method for manufacturing a mandrel includes the steps of:
1) welding the first auxiliary rod 1 and the seed rod 2, wherein the lower end of the seed rod 2 is provided with a conical structure 22 meeting the deposition requirement;
2) the first auxiliary rod 1 is mounted on the rotary elevating mechanism 3, and the loose core rod 5 is deposited on the lower end of the seed rod 2 through the VAD reactor 4;
3) after the deposition is finished, dewatering the loose core rod body 5, and sintering to form a coarse core rod 6;
4) welding a second auxiliary rod 21 at one end of the thick core rod 6 far away from the first auxiliary rod 1;
5) longitudinally extending the thick core rod 6 to obtain a thin core rod 7;
6) after the longitudinal extension is finished, fusing the thin core rod 7 and the seed rod 2 to obtain the seed rod 2 with a conical part 8;
7) the tapered portion 8 of the seed rod 2 is heated, the tapered glass block 9 and the tapered portion 8 are pressed against each other and melted, the tapered portion 8 is pressed and deformed into the cylindrical portion 10, the tapered glass block 9 has a tapered structure 22 that meets the deposition requirement, and the tapered glass block 9, the cylindrical portion 10 and the seed rod 2 are formed into a new seed rod 2 for the next deposition of the core rod loose body 5.
This application is after kind stick 2 fusing, and the butt fusion has the cone glass piece 9 that accords with the cone structure 22 of deposition requirement to the cone glass piece 9, cylindrical portion 10 and the formation of kind stick 2 that obtain are new kind stick 2, can be used for reliably carrying on the next core rod loose body 5 deposit, effectively guarantee deposition quality.
In the present embodiment, the tapered structure 22 includes a flat bottom surface and tapered sidewalls.
As shown in fig. 5 and 6, in the present embodiment, steps 5) to 7) are performed by an extension welding apparatus including:
a heating furnace 11 for heating the coarse core rod 6;
the upper rotating base 12 is positioned above the heating furnace 11, and the upper rotating base 12 is used for limiting the first auxiliary rod 1 and driving the first auxiliary rod 1 to rotate and move up and down;
the lower swivel base 13 is positioned below the heating furnace 11, and the lower swivel base 13 is used for limiting the second auxiliary rod 21 and driving the second auxiliary rod 21 to rotate and move up and down;
a torch unit 14 which is movable up and down for fusing the thin core rod 7 and the seed rod 2 and heating the tapered portion 8 to fuse the tapered portion 8 and the tapered glass block 9;
the rotary clamping seat 15 can move horizontally, the rotary clamping seat 15 is located between the upper rotary seat 12 and the heating furnace 11, the rotary clamping seat 15 is provided with a first working position and a second working position, when the first working position is adopted, the axis of the rotary clamping seat 15 is overlapped with the axis of the upper rotary seat 12, when the second working position is adopted, the rotary clamping seat 15 is far away from the upper rotary seat 12, and the upper rotary seat 12 does not interfere with the rotary clamping seat 15 when moving up and down;
and the telescopic element 16 is used for driving the rotary clamping seat 15 to horizontally move and switch between a first working position and a second working position.
One form of operation of the stretch fusion apparatus: mounting the first auxiliary rod 1 on the upper rotary base 12, moving the upper rotary base 12 downwards, enabling the second auxiliary rod 21 to pass through the heating furnace 11, moving the lower rotary base 13 upwards, and mounting the second auxiliary rod 21 on the lower rotary base 13; the heating furnace 11 works to heat the thick core rod 6, the upper rotary seat 12 and the lower rotary seat 13 drive the first auxiliary rod 1, the thick core rod 6 and the second auxiliary rod 21 to synchronously rotate, and the upper rotary seat 12 and the lower rotary seat 13 are far away from each other to longitudinally delay the thick core rod 6; after the longitudinal extension is completed, the blast burner assembly 14 moves to a position between the seed rod 2 and the thin core rod 7, flame is sprayed to fuse the thin core rod 7 and the seed rod 2, the lower end of the seed rod 2 forms a conical part 8, the upper rotary seat 12 moves upwards, the telescopic element 16 works to drive the rotary seat 15 to move to a first working position, the conical glass block 9 is installed on the rotary seat 15, the blast burner assembly 14 sprays flame to heat the conical part 8 and the conical glass block 9, the upper rotary seat 12 and the rotary seat 15 rotate at the same speed, the upper rotary seat 12 moves downwards to enable the conical glass block 9 and the conical part 8 to be mutually compressed and fused, the conical part 8 is pressed and deformed into a cylindrical part 10, the conical glass block 9, the cylindrical part 10 and the seed rod 2 form a new seed rod 2, the telescopic element 16 resets, and the rotary seat 15 is switched to a second working position.
As shown in fig. 6, in the present embodiment, the glass holder further includes a clamping tool 17, the clamping tool 17 is configured to be mounted on the rotating clamping seat 15 and driven to rotate by the rotating clamping seat 15, an upper surface of the clamping tool 17 has a tapered groove 18 with a wide upper part and a narrow lower part, and the tapered groove 18 is configured to mount the tapered glass block 9. The provision of the tapered groove 18 facilitates the definition of the tapered glass block 9.
In this embodiment, the clamping tool 17 is made of glass.
In this embodiment, the height of the tapered glass block 9 is greater than the depth of the tapered groove 18. The arrangement can prevent the flame from heating and melting the clamping tool 17, and the service life of the clamping tool 17 is influenced.
In the present embodiment, the telescopic element 16 is a cylinder, a hydraulic cylinder or an electric push rod.
As shown in fig. 5 and 6, in the present embodiment, the torch assembly 14 includes a torch 19 and a pushing element 20 capable of driving the torch 19 to move horizontally, and the pushing element 20 is an air cylinder or an electric push rod.
The embodiment also discloses a preform rod, wherein a preform rod loose body is deposited on the outer layer of the core rod, and is sintered to obtain the preform rod, and the core rod is prepared by the manufacturing method of the core rod in the embodiment.
The embodiment also discloses an optical fiber obtained by drawing the preform of the embodiment.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.
Claims (10)
1. A method for manufacturing a mandrel, comprising the steps of:
1) welding the first auxiliary rod with a seed rod, wherein the lower end of the seed rod is provided with a conical structure meeting the deposition requirement;
2) mounting the first auxiliary rod on a rotary lifting mechanism, and depositing loose core rod bodies at the lower end of the seed rod through a VAD reaction furnace;
3) after the deposition is finished, dewatering the loose core rod body, and sintering the loose core rod body into a coarse core rod;
4) welding a second auxiliary rod at one end of the thick core rod, which is far away from the first auxiliary rod;
5) longitudinally extending the thick core rod to obtain a thin core rod;
6) after the longitudinal extension is finished, fusing the thin core rod and the seed rod to obtain the seed rod with a conical part;
7) and heating the conical part of the seed rod, pressing and melting a conical glass block and the conical part mutually, and pressing and deforming the conical part into a cylindrical part, wherein the conical glass block has a conical structure meeting the deposition requirement, and the conical glass block, the cylindrical part and the seed rod form a new seed rod for performing the next deposition of loose core rod bodies.
2. The method of manufacturing a mandrel as claimed in claim 1 wherein said tapered structure includes a flat bottom surface and tapered sidewalls.
3. The mandrel manufacturing method according to claim 1, wherein the steps 5) to 7) are performed by an extension welding apparatus, the extension welding apparatus comprising:
the heating furnace is used for heating the coarse core rod;
the upper rotating seat is positioned above the heating furnace and used for limiting the first auxiliary rod and driving the first auxiliary rod to rotate and move up and down;
the lower swivel base is positioned below the heating furnace and used for limiting the second auxiliary rod and driving the second auxiliary rod to rotate and move up and down;
a torch assembly which can move up and down and is used for fusing the fine core rod and the seed rod and heating the conical part to weld the conical part and the conical glass block together;
the rotary clamping seat can move horizontally, the rotary clamping seat is positioned between the upper rotary seat and the heating furnace, the rotary clamping seat is provided with a first working position and a second working position, the axis of the rotary clamping seat is overlapped with the axis of the upper rotary seat in the first working position, the rotary clamping seat is far away from the upper rotary seat in the second working position, and the upper rotary seat moves up and down without interfering with the rotary clamping seat;
and the telescopic element is used for driving the rotary clamping seat to horizontally move and switch between a first working position and a second working position.
4. The core rod manufacturing method according to claim 3, further comprising a clamping tool for being mounted on the rotary clamping base and being rotated by the rotary clamping base, wherein the upper surface of the clamping tool has a tapered groove with a wide upper portion and a narrow lower portion, and the tapered groove is used for mounting the tapered glass block.
5. The mandrel manufacturing method according to claim 4, wherein the material of the clamping tool is glass.
6. The method of manufacturing a core rod as claimed in claim 4, wherein the height of the tapered glass block is greater than the depth of the tapered groove.
7. The method of manufacturing a mandrel as claimed in claim 3 wherein the telescoping member is a pneumatic cylinder, a hydraulic cylinder or an electric ram.
8. The mandrel manufacturing method according to claim 3, wherein the torch assembly comprises a torch and a pushing member capable of driving the torch to move horizontally, and the pushing member is a cylinder or an electric push rod.
9. A preform rod, characterized in that a preform rod loose body is deposited on the outer layer of a core rod, and the preform rod loose body is sintered to obtain the preform rod, wherein the core rod is prepared by the method for manufacturing the core rod according to any one of claims 1 to 8.
10. An optical fiber obtained by drawing a preform according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111170935.0A CN113998880B (en) | 2021-10-08 | 2021-10-08 | Manufacturing method of core rod, preform rod and optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111170935.0A CN113998880B (en) | 2021-10-08 | 2021-10-08 | Manufacturing method of core rod, preform rod and optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113998880A true CN113998880A (en) | 2022-02-01 |
| CN113998880B CN113998880B (en) | 2023-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111170935.0A Active CN113998880B (en) | 2021-10-08 | 2021-10-08 | Manufacturing method of core rod, preform rod and optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113998880B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0624784A (en) * | 1992-07-09 | 1994-02-01 | Sumitomo Electric Ind Ltd | Production of optical fiber |
| JP2005336030A (en) * | 2004-05-28 | 2005-12-08 | Shin Etsu Chem Co Ltd | Manufacturing method of glass preform for optical fiber |
| JP2007112688A (en) * | 2005-10-24 | 2007-05-10 | Sumitomo Electric Ind Ltd | Manufacturing method of optical fiber preform |
| CN102923942A (en) * | 2012-11-05 | 2013-02-13 | 长飞光纤光缆有限公司 | Method for manufacturing large-diameter optical fiber perform rod |
| CN103739193A (en) * | 2013-12-16 | 2014-04-23 | 江苏亨通光电股份有限公司 | Production method for optical fiber preform conical head |
| CN105271694A (en) * | 2015-11-26 | 2016-01-27 | 长飞光纤光缆股份有限公司 | Method and device for preparing optical fiber preform rod |
| JP2020011881A (en) * | 2018-07-20 | 2020-01-23 | 住友電気工業株式会社 | Manufacturing method of preform for optical fiber |
| CN113432436A (en) * | 2021-07-01 | 2021-09-24 | 浙江富通光纤技术有限公司 | Machining process of core rod |
-
2021
- 2021-10-08 CN CN202111170935.0A patent/CN113998880B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0624784A (en) * | 1992-07-09 | 1994-02-01 | Sumitomo Electric Ind Ltd | Production of optical fiber |
| JP2005336030A (en) * | 2004-05-28 | 2005-12-08 | Shin Etsu Chem Co Ltd | Manufacturing method of glass preform for optical fiber |
| JP2007112688A (en) * | 2005-10-24 | 2007-05-10 | Sumitomo Electric Ind Ltd | Manufacturing method of optical fiber preform |
| CN102923942A (en) * | 2012-11-05 | 2013-02-13 | 长飞光纤光缆有限公司 | Method for manufacturing large-diameter optical fiber perform rod |
| CN103739193A (en) * | 2013-12-16 | 2014-04-23 | 江苏亨通光电股份有限公司 | Production method for optical fiber preform conical head |
| CN105271694A (en) * | 2015-11-26 | 2016-01-27 | 长飞光纤光缆股份有限公司 | Method and device for preparing optical fiber preform rod |
| JP2020011881A (en) * | 2018-07-20 | 2020-01-23 | 住友電気工業株式会社 | Manufacturing method of preform for optical fiber |
| CN113432436A (en) * | 2021-07-01 | 2021-09-24 | 浙江富通光纤技术有限公司 | Machining process of core rod |
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| CN113998880B (en) | 2023-02-24 |
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