CN102998743A - Low-loss single-mode optical fiber applied to long-distance communication transmission and manufacture method thereof - Google Patents
Low-loss single-mode optical fiber applied to long-distance communication transmission and manufacture method thereof Download PDFInfo
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- CN102998743A CN102998743A CN2013100016607A CN201310001660A CN102998743A CN 102998743 A CN102998743 A CN 102998743A CN 2013100016607 A CN2013100016607 A CN 2013100016607A CN 201310001660 A CN201310001660 A CN 201310001660A CN 102998743 A CN102998743 A CN 102998743A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 38
- 230000005540 biological transmission Effects 0.000 title claims abstract description 25
- 238000004891 communication Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 51
- 239000011248 coating agent Substances 0.000 claims abstract description 50
- 238000000137 annealing Methods 0.000 claims abstract description 39
- 239000000835 fiber Substances 0.000 claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005491 wire drawing Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 12
- 238000007665 sagging Methods 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000012681 fiber drawing Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims description 3
- 238000010583 slow cooling Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- 238000012216 screening Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 abstract 4
- 239000011247 coating layer Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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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
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/0253—Controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/40—Monitoring or regulating the draw tension or draw rate
Abstract
The invention relates to optical fiber, in particular to low-loss single-mode optical fiber applied to long-distance communication transmission and simultaneously relates to a manufacture method of the low-loss single-mode optical fiber applied to the long-distance communication transmission. The low-loss single-mode optical fiber comprises a fiber core, a wrapping layer and a coating layer. The fiber core is arranged in the innermost layer of the optical fiber, the wrapping layer is arranged outside the fiber core, made of silicon dioxide and provided with an outer sunken refractive index sectional structure, and a sinking range of the wrapping layer is 0.12%+/-0.04%. The manufacture method includes steps of wire drawing, three-step annealing treatment, cooling, double coatings and curing. Refractive index distribution of a prefabricated rod is adjusted, wire drawing adopts online annealing in step annealing mode, a constant tension programmable logic controller (PLC) automatic control method is adopted in a wire drawing tension control process, small-modulus coating is adopted in the coating selecting aspect, microbend loss is reduced, and large plate wire-winding tension in a screening process is controlled to be small.
Description
Technical field
The present invention relates to a kind of optical fiber, be specifically related to a kind of low-loss single-mode optical fiber that is adapted to the long haul communication transmission, relate to simultaneously the preparation method of the low-loss single-mode optical fiber that is adapted to the long haul communication transmission.
Background technology
Development along with optical fiber technology, the demand of the long Distance Transmission of optical fiber is increasing, existing optical fiber is because its attenuation loss is higher, in the process of long haul communication transmission, need to increase the enhancing that relay station carries out signal, but because relay station is expensive, operator wishes to have the less optical fiber of a kind of loss to use in the long-distance transmissions process more, and reducing construction cost does not affect normal transmission simultaneously.
Summary of the invention
Goal of the invention: the objective of the invention is in order to solve the deficiencies in the prior art, a kind of low-loss single-mode optical fiber that is adapted to the long haul communication transmission is provided, another object of the present invention is to provide a kind of preparation method who is adapted to the low-loss single-mode optical fiber of long haul communication transmission.
Technical scheme: be adapted to low-loss single-mode optical fiber of long haul communication transmission and preparation method thereof, realize by the following technical solutions.
The low-loss single-mode optical fiber that is adapted to the long haul communication transmission comprises fibre core, covering and coat.Fibre core is in the optical fiber innermost layer, and the fibre core outer setting has covering, and covering adopts silicon dioxide, has outer sagging refractive index profile structure, and its surrounding layer amplitude of sinking reaches 0.12% ± 0.04%, and coat is outside at covering.
Described coat adopts two-layer coating, and interior coating adopts little modulus coating, applies, and passes through ultraviolet light polymerization again, and outer layer coating adopts ultraviolet light coating, carries out ultraviolet light polymerization after the coating.Described little modulus coating adopts ultraviolet-curing paint, and modulus is lower than 0.7MPa.
The described preparation method who is adapted to the low-loss single-mode optical fiber of long haul communication transmission is characterized in that: may further comprise the steps:
(1) select the sink prefabricated rods of structure of surrounding layer, plug is in the prefabricated rods innermost layer, and the plug outside is provided with covering, and covering adopts silicon dioxide, has outer sagging refractive index profile structure, and its surrounding layer amplitude of sinking reaches 0.12% ± 0.04%.
(2) adopt high-temperature smelting pot to carry out wire drawing, temperature is controlled at 1800 ~ 2200 ℃;
(3) carry out three step ladder type annealing in process after wire drawing is come out of the stove, annealing is at the fiber drawing furnace annealing pipe for the first time, and annealing pipe arranges the graphite heat-insulation layer, makes its slow cooling in the fiber drawing furnace annealing pipe, drops to 1500 degree from about 2000 degree, and annealing time is 3 ~ 7s; Annealing is 15cm place below the fiber drawing furnace annealing pipe for the second time, installs in the long heating furnace of 1 ~ 3m and carries out insulation annealing, annealing temperature is set at 1000 ~ 1200 degree, according to the numerical value adjustment control annealing temperature of fiber optic temperature on-line monitoring device demonstration; Anneal for the third time at 20 ~ 50cm place, holding furnace bottom, insulating tube is set, in-built heat-insulation layer does not arrange the device of heating in addition, makes optical fiber pass through insulating tube temperature slow decreasing.
Through the natural cooling space of 3 ~ 5m, enter the helium gas cooling pipe and force cooling again, fiber optic temperature is reduced to below 100 degree.Formation has the bare fibre of outer sagging covering.
(4) adopt permanent tension force PLC control system in the drawing process, keep stable tension 2.0 ~ 3.0N, produce, when reducing micro-crack, keep the stable of fibre cladding diameter.
(5) bare fibre is carried out two-layer coating, interior coating adopts little modulus coating, applies, and passes through ultraviolet light polymerization again.Outer layer coating adopts ultraviolet light coating, carries out ultraviolet light polymerization after the coating.Described little modulus coating adopts ultraviolet-curing paint, and modulus is lower than 0.7MPa;
(6) adopt at last take-up with optical fiber with the small tension receiving coil take-up, tension force is less than 0.7N, around finishing production to fiber reel.
Beneficial effect of the present invention: the present invention adopts the index distribution of adjusting prefabricated rods, online annealing is adopted in wire drawing, the staged annealing way, in the drawing tensile force control procedure, adopt permanent tension force PLC automatic control mode, adopt little modulus coating at coating aspect choosing, reduce its microbending loss, control deep bid takeup tension is in less level, for example less than 0.6N in the screening process.Finally can produce a kind of low-loss single-mode optical fiber that is adapted to the long haul communication transmission, its 1550nm place loss can be low to moderate 0.175dB/km, much smaller than the 0.3dB/km of standard code, is particularly useful for the telecommunication transmission.
Description of drawings
The invention will be further described below with reference to accompanying drawing:
Fig. 1 is the structural drawing of the optical fiber produced of preparation method of the present invention.
Fig. 2 is preparation method's of the present invention outer sagging blanket design structural drawing.
Fig. 3 is preparation method's of the present invention process flow diagram.
Among the figure: 1. fibre core, 2. outer sagging covering, 3. surrounding layer, 4. a ultra-violet curing coating, 5. secondary ultra-violet curing coating.
Embodiment
With reference to accompanying drawing 1,2,3, the low-loss single-mode optical fiber that is adapted to the long haul communication transmission comprises fibre core 1, covering and coat.Fibre core 1 is in the optical fiber innermost layer, and the fibre core outer setting has covering, and covering adopts silicon dioxide, has outer sagging refractive index profile structure, and its surrounding layer amplitude of sinking reaches 0.12% ± 0.04%.Coat is outside at covering.
Described coat adopts two-layer coating, and interior coating adopts little modulus coating, applies, and passes through ultraviolet light polymerization again.Outer layer coating adopts ultraviolet light coating, carries out ultraviolet light polymerization after the coating.Described little modulus coating adopts ultraviolet-curing paint, and modulus is lower than 0.7MPa;
The described preparation method who is adapted to the low-loss single-mode optical fiber of long haul communication transmission is characterized in that: may further comprise the steps:
(1) select the sink prefabricated rods of structure of surrounding layer, plug is in the prefabricated rods innermost layer, and the plug outside is provided with covering, and covering adopts silicon dioxide, has outer sagging refractive index profile structure, and its surrounding layer amplitude of sinking reaches 0.12% ± 0.04%.
(2) adopt high-temperature smelting pot to carry out wire drawing, temperature is controlled at 1800 ~ 2200 ℃;
(3) carry out three step ladder type annealing in process after wire drawing is come out of the stove, annealing is at the fiber drawing furnace annealing pipe for the first time, and annealing pipe arranges the graphite heat-insulation layer, makes its slow cooling in the fiber drawing furnace annealing pipe, drops to 1500 degree from about 2000 degree, and annealing time is 3 ~ 7s; Annealing is 15cm place below the fiber drawing furnace annealing pipe for the second time, installs in the long heating furnace of 1 ~ 3m and carries out insulation annealing, annealing temperature is set at 1000 ~ 1200 degree, according to the numerical value adjustment control annealing temperature of fiber optic temperature on-line monitoring device demonstration; Anneal for the third time at 20 ~ 50cm place, holding furnace bottom, insulating tube is set, in-built heat-insulation layer does not arrange the device of heating in addition, makes optical fiber pass through insulating tube temperature slow decreasing.
Through the natural cooling space of 3 ~ 5m, enter the helium gas cooling pipe and force cooling again, fiber optic temperature is reduced to below 100 degree, form the bare fibre with outer sagging covering.
(4) adopt permanent tension force PLC control system in the drawing process, keep stable tension 2.0 ~ 3.0N, produce, when reducing micro-crack, keep the stable of fibre cladding diameter.
(5) bare fibre is carried out two-layer coating, interior coating adopts little modulus coating, applies, and passes through ultraviolet light polymerization again.Outer layer coating adopts ultraviolet light coating, carries out ultraviolet light polymerization after the coating.Described little modulus coating adopts ultraviolet-curing paint, and modulus is lower than 0.7MPa;
(6) adopt at last take-up with optical fiber with the small tension receiving coil take-up, tension force is less than 0.7N, around finishing production to fiber reel.
By the optical attenuator drain performance of measuring fiber, at 23 ± 5 degree, under the condition of humidity 50 ± 5, use optical fiber retroreflection instrument to test, the pad value of its 1550nm wave band is 0.174dB/km.
The present invention adopts the index distribution of adjusting prefabricated rods, the staged annealing way is adopted in wire drawing, in the drawing tensile force control procedure, adopt permanent tension force PLC automatic control mode, adopt little modulus coating at coating aspect choosing, reduce its microbending loss, control deep bid takeup tension is in less level, for example less than 0.6N in the screening process.Finally can produce a kind of low-loss single-mode optical fiber that is adapted to the long haul communication transmission, its 1550nm place loss can be low to moderate 0.175dB/km, much smaller than the 0.3dB/km of standard code, is particularly useful for the telecommunication transmission.
Claims (4)
1. a low-loss single-mode optical fiber that is adapted to the long haul communication transmission is characterized in that: comprise fibre core, covering and coat; Fibre core is in the optical fiber innermost layer, and the fibre core outer setting has covering, and covering adopts silicon dioxide, has outer sagging refractive index profile structure, and its surrounding layer amplitude of sinking reaches 0.12% ± 0.04%, and coat is outside at covering.
2. the low-loss single-mode optical fiber that is adapted to long haul communication transmission according to claim 1, it is characterized in that: described coat adopts two-layer coating, interior coating adopts little modulus coating, apply, pass through again ultraviolet light polymerization, outer layer coating adopts ultraviolet light coating, carries out ultraviolet light polymerization after the coating.
3. the low-loss single-mode optical fiber that is adapted to long haul communication transmission according to claim 2, it is characterized in that: described little modulus coating adopts ultraviolet-curing paint, and modulus is lower than 0.7MPa.
4. the preparation method who is adapted to the low-loss single-mode optical fiber of long haul communication transmission claimed in claim 1 is characterized in that: may further comprise the steps:
(1) select the sink prefabricated rods of structure of surrounding layer, plug is in the prefabricated rods innermost layer, and the plug outside is provided with covering, and covering adopts silicon dioxide, has outer sagging refractive index profile structure, and its surrounding layer amplitude of sinking reaches 0.12% ± 0.04%;
(2) adopt high-temperature smelting pot to carry out wire drawing, temperature is controlled at 1800 ~ 2200 ℃;
(3) carry out three step ladder type annealing in process after wire drawing is come out of the stove, annealing is at the fiber drawing furnace annealing pipe for the first time, and annealing pipe arranges the graphite heat-insulation layer, makes its slow cooling in the fiber drawing furnace annealing pipe, drops to 1500 degree from about 2000 degree, and annealing time is 3 ~ 7s; Annealing for the second time is 15cm place below the fiber drawing furnace annealing pipe, installs in the long heating furnace of 1 ~ 3m and carries out insulation annealing, annealing temperature is set at 1000 ~ 1200 degree, controls annealing temperature according to the numerical value adjustment that fiber optic temperature on-line monitoring device shows; Anneal for the third time at 20 ~ 50cm place, holding furnace bottom, insulating tube is set, in-built heat-insulation layer does not arrange the device of heating in addition, makes optical fiber pass through insulating tube temperature slow decreasing;
Through the natural cooling space of 3 ~ 5m, enter the helium gas cooling pipe and force cooling again, fiber optic temperature is reduced to below 100 degree, form the bare fibre with outer sagging covering;
(4) adopt permanent tension force PLC control system in the drawing process, keep stable tension 2.0 ~ 3.0N, produce, when reducing micro-crack, keep the stable of fibre cladding diameter;
(5) bare fibre is carried out two-layer coating, interior coating adopts little modulus coating, applies, pass through ultraviolet light polymerization, outer layer coating adopts ultraviolet light coating, carries out ultraviolet light polymerization after the coating again, described little modulus coating adopts ultraviolet-curing paint, and modulus is lower than 0.7MPa;
(6) adopt at last take-up with optical fiber with the small tension receiving coil take-up, tension force is less than 0.7N, around finishing production to fiber reel.
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| CN201310001660.7A CN102998743B (en) | 2013-01-05 | 2013-01-05 | Low-loss single-mode optical fiber applied to long-distance communication transmission and manufacture method thereof |
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| CN201310001660.7A CN102998743B (en) | 2013-01-05 | 2013-01-05 | Low-loss single-mode optical fiber applied to long-distance communication transmission and manufacture method thereof |
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| CN102998743B CN102998743B (en) | 2015-04-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699159A (en) * | 2013-12-17 | 2014-04-02 | 中天科技光纤有限公司 | Automatic control device and control method for ultraviolet light intensity of optical fiber |
| CN104496171A (en) * | 2014-11-27 | 2015-04-08 | 南京烽火藤仓光通信有限公司 | Method for reducing optical fiber loss |
| CN106116138A (en) * | 2016-05-18 | 2016-11-16 | 中天科技光纤有限公司 | A kind of wire drawing coating processes of minor diameter low-loss bend-insensitive single-mode optical fiber |
| CN110174724A (en) * | 2019-04-08 | 2019-08-27 | 安徽长荣光纤光缆科技有限公司 | A kind of low-loss single-mode optical fiber and preparation method thereof |
| CN112499961A (en) * | 2020-12-07 | 2021-03-16 | 中天科技光纤有限公司 | Optical fiber and method for producing the same |
| CN113716862A (en) * | 2021-09-01 | 2021-11-30 | 中天科技光纤有限公司 | Method and apparatus for manufacturing optical fiber |
Families Citing this family (1)
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| CN108919415B (en) * | 2018-07-19 | 2021-05-14 | 江苏南方光纤科技有限公司 | Low-loss single-mode optical fiber and drawing process thereof |
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| CN106116138A (en) * | 2016-05-18 | 2016-11-16 | 中天科技光纤有限公司 | A kind of wire drawing coating processes of minor diameter low-loss bend-insensitive single-mode optical fiber |
| CN110174724A (en) * | 2019-04-08 | 2019-08-27 | 安徽长荣光纤光缆科技有限公司 | A kind of low-loss single-mode optical fiber and preparation method thereof |
| CN112499961A (en) * | 2020-12-07 | 2021-03-16 | 中天科技光纤有限公司 | Optical fiber and method for producing the same |
| CN113716862A (en) * | 2021-09-01 | 2021-11-30 | 中天科技光纤有限公司 | Method and apparatus for manufacturing optical fiber |
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Denomination of invention: Low loss single-mode optical fiber suitable for long-distance communication transmission and its preparation method Effective date of registration: 20210909 Granted publication date: 20150401 Pledgee: Rudong sub branch of Bank of China Ltd. Pledgor: ZHONGTIAN TECHNOLOGY FIBER POTICS Co.,Ltd. Registration number: Y2021320000217 |
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Denomination of invention: Low loss single-mode optical fiber suitable for long-distance communication transmission and its preparation method Effective date of registration: 20221011 Granted publication date: 20150401 Pledgee: Rudong sub branch of Bank of China Ltd. Pledgor: ZHONGTIAN TECHNOLOGY FIBER POTICS Co.,Ltd. Registration number: Y2022320000592 |