CN101255005B - Production method of ultralow-polarization dispersive single-mode fiber - Google Patents

Production method of ultralow-polarization dispersive single-mode fiber Download PDF

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Publication number
CN101255005B
CN101255005B CN 200810023379 CN200810023379A CN101255005B CN 101255005 B CN101255005 B CN 101255005B CN 200810023379 CN200810023379 CN 200810023379 CN 200810023379 A CN200810023379 A CN 200810023379A CN 101255005 B CN101255005 B CN 101255005B
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fiber
optical fiber
polarization
coating
mode dispersion
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CN101255005A (en
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薛济萍
沈一春
薛群山
庄卫星
钱宜刚
许春华
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Zhongtian Technologies Fibre Optics Co Ltd
Jiangsu Zhongtian Technology Co Ltd
Zhongtian Technology Precision Material Co Ltd
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Zhongtian Technologies Fibre Optics Co Ltd
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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
    • C03B37/03—Drawing means, e.g. drawing drums ; Traction or tensioning devices
    • C03B37/032—Drawing means, e.g. drawing drums ; Traction or tensioning devices for glass optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/18—Axial perturbations, e.g. in refractive index or composition
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/36—Dispersion modified fibres, e.g. wavelength or polarisation shifted, flattened or compensating fibres (DSF, DFF, DCF)

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  • Engineering & Computer Science (AREA)
  • 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)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

The invention discloses an ultra-low polarization mode dispersion single mode fiber production method, which relates to a production method for effectively reducing the polarization mode dispersion of the single mode fiber to ensure the single mode fiber to be suitable for optical fiber communication system with high speed, large capacity and long distance. The method comprises the steps that firstly, a rod is installed on a tower to start wire drawing; secondly, naked fiber is cooled; thirdly, the fiber is coated; fifth, taking up, compounding and testing performed to the fiber. A sinusoidalfiber twisting device is inducted between a main traction structure and a double taking up structure, to perform periodic sinusoidal twisting to the fiber, therefore the fiber polarization mode dispersion (PMD) value is effectively reduced, the process influence on the wire drawing perpendicular direction is avoided, more stable and reliable control effect is played to the production of the fiberwire drawing, particularly the naked fiber, and the fiber polarization mode dispersion (PMD) value is improved better. The feed speed of the feed unit of a perform rod can be adjusted in time according to the feedback signal of a naked fiber diameter testing system, and therefore the stability of the naked fiber diameter is ensured.

Description

Production method of ultralow-polarization dispersive single-mode fiber
Technical field
What production method of ultralow-polarization dispersive single-mode fiber of the present invention related to is a kind of polarization mode dispersion of effective reduction single-mode fiber, makes single-mode fiber be applicable to a kind of working method of high speed, large vol, long-distance optical fiber communication system.
Background technology
Polarization mode dispersion exists in optical fiber always, just in the lower rate transmissions system, communication quality is not constituted influence.But along with opticfiber communication develops to high bit rate, multi-channel, long distance and all-optical network direction; The particularly application of 40Gb/s speed fiber optic communication systems; The polarization mode dispersion of originally in numeral and analog optical fiber communication system, not too being paid close attention to has become the principal element that limits speed fiber optic communication systems transmission capacity and distance.Adopt that general single mode fiber working method and device thereof produce G.652A, G.652B optical fiber is because its polarization mode dispersion fluctuation is difficult to control, and the polarization mode dispersion value is generally bigger, therefore can not satisfy the requirement of present optical communication development.
Summary of the invention
The objective of the invention is provides a kind of production method of ultralow-polarization dispersive single-mode fiber to above-mentioned weak point; Be a kind of polarization mode dispersion (Polarization Mode Dispersion of online effective reduction single-mode fiber; Abbreviation PMD) working method; Under the prerequisite that original G.652A/B drawing optical fibers equipment makes full use of, between main towing mechanism and two take-up, introduce sinusoidal optic fibre turning device, thereby optical fiber is produced the twisting action of one-period property; Make the stress symmetric that receives one-period property on the fiber cores xsect, come to offset gradually the process method of the relative phase time delay of two polarization modes when in optical fiber, transmitting with this.
A kind of production method of ultralow-polarization dispersive single-mode fiber is characterized in that:
(1) the dress rod is gone up tower, the beginning wire drawing
Prefabricated rods is contained on the fiber drawing furnace, and setup parameter begins wire drawing, and temperature is controlled at 2000 ℃～2300 ℃;
The fiber drawing furnace part is made up of graphite piece ash content requirement≤20ppm graphite heating parts and stainless steel furnace part; Graphite piece surfaceness R C≤6.3, the inert protective gas behind the secondary filtration gets into fiber drawing furnace, and air flow rate is 10-50L/min, and gas moves according to layer flow mode;
(2) naked fine cooling
Come out bare fibre from the fiber drawing furnace high-temperature zone through cooling tube, feed helium and make it to force cooling, the helium gas flow of feeding is 0.2-12L/min;
(3) optical fiber applies
Cooled optical fiber passes mould, is coated with cup, carries out coating and applies, and adopts mould control diameter and concentricity size, and the bare fibre temperature is 20 ℃～100 ℃ during coating; Adopt UV curing system that coating is cured, the exhausting size is 0.5-15L/min, and the irradiation with UV-light simultaneously concentrates on optical fiber surface;
(4) the sinusoidal rubbing of optical fiber
Between main towing mechanism and two take-up, introduce sinusoidal optic fibre turning device; Carry out rubbing through sinusoidal optic fibre turning device behind the optical fiber curing after the coating; Setting the sinusoidal amplitude of reversing the rubbing wheel is 10 °～80 °, and the frequency that sine reverses the rubbing wheel is 0.02-10 time/s;
(5) optical fiber take-up, after-combustion, detection
Through behind the sinusoidal optic fibre turning device, through two take-ups, optical fiber carries out winding displacement automatically, laggard row filter of dishful and Performance Detection, polarization mode dispersion value≤0.2ps/ (km) 1/2, promptly obtain this ultralow polarization mode dispersion PMD single-mode fiber.
Production method of ultralow-polarization dispersive single-mode fiber takes following scheme to realize:
1, the dress rod is gone up tower, the beginning wire drawing
Prefabricated rods is contained on the fiber drawing furnace, and setup parameter begins wire drawing, and temperature is controlled at 2000 ℃～2300 ℃.
The fiber drawing furnace part is made up of graphite heating parts and stainless steel furnace part as the molten place that is condensed to optical fiber of prefabricated rods.Wherein the volatile matter quantity and the surfaceness of graphite piece have all been carried out strict regulation: graphite piece ash content requirement≤20ppm; Graphite piece surfaceness R C≤6.3.And the inert protective gas to entering before the fiber drawing furnace has been carried out secondary filtration, has guaranteed the cleanliness factor of gas.Simultaneously the air-flow in the fiber drawing furnace has been carried out flow control 10-50L/min; And make strict the moving of gas according to layer flow mode; So that the particle that graphite piece produces is under the purging of air-flow, not taken out of stove outward perhaps attached to the inwall of fiber drawing furnace bottom with melten glass and the contacted track of optical fiber; Avoid air-flow directly to blow to glass melting district and optical fiber formation district simultaneously, improved the stability and the homogeneity of naked fibre greatly, play the good basis assurance for subsequent handling control reduces polarization mode dispersion PMD value.
2, naked fine cooling
The bare fibre that comes out from the fiber drawing furnace high-temperature zone is fed helium through cooling tube force cooling.Helium gas flow is controlled at 0.2-12L/min optimizes optical fiber cooled gas flow mode; The stress that remains in the optical fiber is reduced; Reduced owing to unrelieved stress and, the optical parametric generation positive influence of optical fiber has also further been improved the stability of polarization mode dispersion PMD value the photoelastic effect that optical fiber produces.
3, optical fiber applies
Cooled optical fiber is passed mould, is coated with cup; Carrying out coating applies; Utilize mould control diameter and concentricity size, according to the character of different coating, optimize application temperature simultaneously; During coating (the bare fibre temperature is at 20 ℃～100 ℃), improve the homogeneity of coating and the bonding properties between coating and the bare fibre; Utilize UV curing system that coating is cured: adjustment exhausting size (0.5-15L/min), the irradiation with UV-light simultaneously concentrates on optical fiber surface, guarantees that fibre coating is in the homogeneity of all directions curing performance and the appropriateness of degree of cure.These improvement have improved the binding ability of coating and bare fibre, have reduced the influence of the residual stress in the coating to bare fibre, have reduced the local inhomogeneous microbending effect that causes owing to coating stress, thereby have guaranteed the controllability of optic fiber polarization mould dispersion PMD.
4, the sinusoidal rubbing of optical fiber
Carry out rubbing through sinusoidal optic fibre turning device behind the optical fiber curing after the coating; This device reverses rubbing wheel, support and related electric control section by sine and forms; Its position is between main towing mechanism and two take-up, and through setting the amplitude and the frequency of rubbing wheel, the amplitude of rubbing wheel is 10 °～80 °; The frequency of rubbing wheel is 0.02-10 time/s; Different with drawing speed, the twisting action to optical fiber generation one-period property makes the stress symmetric that receives one-period property on the fiber cores xsect; Come to offset gradually the relative phase time delay of two polarization modes when in optical fiber, transmitting with this, thus the very big reduction optic fiber polarization mould dispersion PMD value of degree and make it be controlled at a comparatively stable status.
5, optical fiber take-up, after-combustion, detection
Behind the rubbing device, through two take-ups, optical fiber carries out winding displacement automatically, the laggard row filter of dishful, Performance Detection.Polarization mode dispersion value≤0.2ps/ (km) 1/2, promptly obtain this ultralow polarization mode dispersion PMD single-mode fiber.
This invention production method of ultralow-polarization dispersive single-mode fiber is through introducing sinusoidal optic fibre turning device between main traction and two take-up; Optical fiber is carried out periodic sine to be reversed; Effectively reduce optic fiber polarization mould dispersion PMD value; And, avoided the technogenic influence on the wire drawing vertical direction because its device between take-up part and traction element, is compared with the general technology on the main traction that places; To drawing optical fibers particularly the production of bare fibre play more reliable and more stable control effect, thereby better improve optic fiber polarization mould dispersion PMD value.Prefabricated rods is given unitary feeding speed and can in time be adjusted according to the signal of naked fine diameter detection system feedback, thereby guarantees the stability of naked fine diameter.This plays good booster action for the sinusoidal torsion device of optic fiber polarization mould dispersion PMD.
Description of drawings
Below will combine accompanying drawing that the present invention is described further.
Fig. 1 is a sinusoidal optic fibre turning device synoptic diagram of the present invention.
Embodiment
With reference to accompanying drawing 1, production method of ultralow-polarization dispersive single-mode fiber:
(1) the dress rod is gone up tower, the beginning wire drawing
Prefabricated rods is contained on the fiber drawing furnace, and setup parameter begins wire drawing, and temperature is controlled at 2000 ℃～2300 ℃.
The fiber drawing furnace part is made up of graphite heating parts and stainless steel furnace part as the molten place that is condensed to optical fiber of prefabricated rods.Wherein the volatile matter quantity and the surfaceness of graphite piece have all been carried out strict regulation: graphite piece ash content requirement≤20ppm; Graphite piece surfaceness R C≤6.3.And the inert protective gas to entering before the fiber drawing furnace has been carried out secondary filtration, has guaranteed the cleanliness factor of gas.Simultaneously the air-flow in the fiber drawing furnace has been carried out flow control 10-50L/min; And make strict the moving of gas according to layer flow mode; So that the particle that graphite piece produces is under the purging of air-flow, not taken out of stove outward perhaps attached to the inwall of fiber drawing furnace bottom with melten glass and the contacted track of optical fiber; Avoid air-flow directly to blow to glass melting district and optical fiber formation district simultaneously, improved the stability and the homogeneity of naked fibre greatly, play the good basis assurance for subsequent handling control reduces polarization mode dispersion PMD value.
(2) naked fine cooling
The bare fibre that comes out from the fiber drawing furnace high-temperature zone is fed helium through cooling tube force cooling.Helium gas flow is controlled at 0.2-12L/min optimizes optical fiber cooled gas flow mode; The stress that remains in the optical fiber is reduced; Reduced owing to unrelieved stress and, the optical parametric generation positive influence of optical fiber has also further been improved the stability of polarization mode dispersion PMD value the photoelastic effect that optical fiber produces.
(3) optical fiber applies
Cooled optical fiber is passed mould, is coated with cup; Carrying out coating applies; Utilize mould control diameter and concentricity size, according to the character of different coating, optimize application temperature simultaneously; During coating (the bare fibre temperature is at 20 ℃～100 ℃), improve the homogeneity of coating and the bonding properties between coating and the bare fibre; Utilize UV curing system that coating is cured: adjustment exhausting size (0.5-15L/min), the irradiation with UV-light simultaneously concentrates on optical fiber surface, guarantees that fibre coating is in the homogeneity of all directions curing performance and the appropriateness of degree of cure.These improvement have improved the binding ability of coating and bare fibre, have reduced the influence of the residual stress in the coating to bare fibre, have reduced the local inhomogeneous microbending effect that causes owing to coating stress, thereby have guaranteed the controllability of optic fiber polarization mould dispersion PMD.
(4) the sinusoidal rubbing of optical fiber
Optical fiber 2 after the coating solidifies the back and carries out rubbing through sinusoidal optic fibre turning device; This device reverses rubbing wheel 5, support 3 and related electric control section 4 by sine and forms; Its position is between main towing mechanism 1 and two take-up 6, and through setting amplitude and the frequency that sine reverses rubbing wheel 5, the amplitude that sine reverses rubbing wheel 5 is 10 °～80 °; The frequency that sine reverses rubbing wheel 5 is 0.02-10 time/s; Different with drawing speed, the twisting action to optical fiber 2 generation one-period property makes the stress symmetric that receives one-period property on the fiber cores xsect; Come to offset gradually the relative phase time delay of two polarization modes when in optical fiber, transmitting with this, thus the very big reduction optic fiber polarization mould dispersion PMD value of degree and make it be controlled at a comparatively stable status.
(5) optical fiber take-up, after-combustion, detection
Behind the rubbing device, through two take-ups, optical fiber carries out winding displacement automatically, the laggard row filter of dishful, Performance Detection.Polarization mode dispersion value≤0.2ps/ (km) 1/2, promptly obtain this ultralow polarization mode dispersion PMD single-mode fiber.

Claims (1)

1. production method of ultralow-polarization dispersive single-mode fiber is characterized in that:
(1) the dress rod is gone up tower, the beginning wire drawing
Prefabricated rods is contained on the fiber drawing furnace, and setup parameter begins wire drawing, and temperature is controlled at 2000 ℃～2300 ℃;
The fiber drawing furnace part is made up of graphite piece ash content requirement≤20ppm graphite heating parts and stainless steel furnace part; Graphite piece surfaceness R C≤6.3, the inert protective gas behind the secondary filtration gets into fiber drawing furnace, and air flow rate is 10-50L/min, and gas moves according to layer flow mode;
(2) naked fine cooling
Come out bare fibre from the fiber drawing furnace high-temperature zone through cooling tube, feed helium and make it to force cooling, the helium gas flow of feeding is 0.2-12L/min;
(3) optical fiber applies
Cooled optical fiber passes mould, is coated with cup, carries out coating and applies, and adopts mould control diameter and concentricity size, and the bare fibre temperature is 20 ℃～100 ℃ during coating; Adopt UV curing system that coating is cured, the exhausting size is 0.5-15L/min, and the irradiation with UV-light simultaneously concentrates on optical fiber surface;
(4) the sinusoidal rubbing of optical fiber
Between main towing mechanism and two take-up, introduce sinusoidal optic fibre turning device; Carry out rubbing through sinusoidal optic fibre turning device behind the optical fiber curing after the coating; Setting the sinusoidal amplitude of reversing the rubbing wheel is 10 °～80 °, and the frequency that sine reverses the rubbing wheel is 0.02-10 time/s;
(5) optical fiber take-up, after-combustion, detection
Through behind the sinusoidal optic fibre turning device, through two take-ups, optical fiber carries out winding displacement automatically, laggard row filter of dishful and Performance Detection, polarization mode dispersion value≤0.2ps/ (km) 1/2, promptly obtain this ultralow polarization mode dispersion PMD single-mode fiber.
CN 200810023379 2008-04-10 2008-04-10 Production method of ultralow-polarization dispersive single-mode fiber Active CN101255005B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101533122B (en) * 2009-04-27 2010-08-04 中天科技光纤有限公司 Method for preparing single-film optical fiber for high-strength large-coil long submarine optical cable
CN102173603B (en) * 2010-12-13 2013-02-13 烽火通信科技股份有限公司 Full-automatic high-speed wire drawing curing system
CN104298139B (en) * 2014-09-23 2017-06-20 中天科技光纤有限公司 A kind of screening installation automatic control system and its control method
CN104876436B (en) * 2015-06-12 2018-06-26 上海南明光纤技术有限公司 The manufacturing method and equipment of low polarization mode dispersion optical fiber
CN107401988B (en) * 2017-09-08 2023-09-15 成都中住光纤有限公司 Optical fiber coating concentricity monitoring system
CN108675045B (en) * 2018-05-21 2019-10-25 烽火通信科技股份有限公司 A kind of rewinding equipment for being manufactured without torsion polarization maintaining optical fibre
CN111620560B (en) * 2020-06-10 2021-11-09 长飞光纤光缆股份有限公司 Drawn optical fiber twisting control device and method and multimode optical fiber
CN112880546A (en) * 2021-01-11 2021-06-01 于孟今 Device and system for monitoring optical fiber distortion
CN116655232A (en) * 2023-08-02 2023-08-29 广州兔鼠实业有限公司 Device and method for controlling twisting of drawn optical fiber and multimode optical fiber

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Owner name: ZHONGTIAN SCIENCE AND TECHNOLOGY CO LTD, JIANGSU J

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Address after: 226009 Nantong economic and Technological Development Zone, Jiangsu Zhongtian Road, No. 6

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Patentee after: Jiangsu Zhongtian Technology Precision Material Co., Ltd.

Address before: 226009 Nantong economic and Technological Development Zone, Jiangsu Zhongtian Road, No. 6

Patentee before: Zhongtian Technologies Fiber Optics Co., Ltd.