Preparation method of tensile optical fiber

A technology of optical fiber and tensile strength, which is applied in the field of preparation of tensile optical fiber, can solve the problem that the strength is difficult to meet the use requirements, and achieve the effect of reducing the generation of micro-cracks on the quartz surface and enhancing the tensile strength

Active Publication Date: 2020-05-19
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention aims to solve the problem that the strength of the existing optical fiber is difficult to meet t

Method used

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  • Preparation method of tensile optical fiber
  • Preparation method of tensile optical fiber

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Embodiment 1

[0028] The quartz preform is pretreated before wire drawing, that is, the quartz preform is flame polished on the preform processing lathe, the flame temperature is controlled at 1600-1650°C, the rotation speed of the quartz preform is 30 rpm, and the flame moving speed is 120mm / min. After flame polishing, put the quartz preform into the annealing furnace for annealing without waiting for the quartz preform to cool down. The annealing temperature is from 1500°C to 900°C at a rate of 10°C / hour, and then cooled to room temperature. Use 3:1 HF acid and HNO for the annealed quartz preform 3 The acid mixture is used for etching, and the etching time is 15 minutes. After the etching is completed, a thin-walled borosilicate glass tube is coated on the quartz preform. The ratio of the wall thickness of the borosilicate glass tube to the diameter of the quartz preform is 1:20, and then wire drawing is carried out. Drawing parameters are as in Table 1 1 # As shown in the samples, the...

Embodiment 2

[0030] Before the wire drawing, the quartz preform is pretreated, and the pretreatment method is the same as in Example 1. After the pretreatment, a thin-walled borosilicate glass tube is placed on the quartz preform, and the thickness of the borosilicate glass tube wall and the diameter ratio of the preform are 1:25, using 2 in Table 1 # Drawing with the same parameters, the drawing temperature is 2080°C, the splicing speed is 50m / min, the drawing tension is controlled within the range of 4±1g during the drawing process, gradient annealing is carried out during the drawing process, and the annealing temperature gradually changes from the entrance to the exit temperature from 1500°C To 500°C, brushed with acrylic resin coating. After the wire drawing is completed, the mechanical properties of the optical fiber are tested, and the results are shown in Table 1. The tension is 250kpsi for screening, the screening length is 50km, and the full disk rate is 30%. The breaking streng...

Embodiment 3

[0032] Before wire drawing, the quartz preform is pretreated. The pretreatment method is the same as in Example 1. After the pretreatment, a thin-walled borosilicate glass tube is placed on the preform. The thickness of the borosilicate glass tube wall and the diameter ratio of the preform are 1. : 30, using 3 in Table 1 # The drawing temperature is 2100°C, the drawing speed is 50m / min, the drawing tension is controlled within the range of 3±1g during the drawing process, gradient annealing is carried out during the drawing process, and the annealing temperature is gradually changed from 1500°C to 1500°C from the entrance to the exit. 500°C, brushed with acrylic resin coating. After the wire drawing is completed, the mechanical properties of the optical fiber are tested, and the results are shown in Table 1. The tension is 250kpsi for screening, the screening length is 50km, and the full disk rate is 50%. The breaking strength of the optical fiber was tested, and the breaking...

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Abstract

The invention relates to a preparation method of a tensile optical fiber, and aims to solve the problem that the strength of an existing optical fiber is difficult to meet use requirements in some special application fields. The preparation method comprises steps: a quartz preform is subjected to flame polishing and acid etching treatment; a thin borosilicate glass tube is sleeved on the outer layer of the quartz preform; then wire drawing is carried out, low-speed wire drawing is adopted, the wire drawing speed is controlled within the range of 10-50 m/min, gradient annealing treatment is carried out after the optical fiber comes out of afurnace mouth, a gradient annealing mode withgradually-changed temperature is adopted, finally coating is carried out. The optical fiber drawn through the method canmeetthe high-strength use requirement.

Description

technical field [0001] The invention relates to optical fiber preparation, in particular to a preparation method of tensile optical fiber. Background technique [0002] Optical fiber communication technology has become one of the main pillars of modern communication and plays a pivotal role in modern telecommunication networks. As a revolutionary technology, optical fiber communication has shown its incomparable advantages in many aspects, such as light weight, small size, anti-electromagnetic interference, and large transmission information capacity. However, for some special application fields, the current optical fiber strength is still difficult to meet the use requirements, and it still needs to be improved. Contents of the invention [0003] The invention aims to solve the problem that the strength of the existing optical fiber is difficult to meet the use requirement in some special application fields, and provides a preparation method of the tensile optical fiber....

Claims

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Application Information

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IPC IPC(8): C03B37/012C03B37/027C03C15/00C03C25/285C03B29/00C03C13/04
CPCC03B29/00C03B37/01205C03B37/01211C03B37/027C03B37/02727C03C13/04C03C13/045C03C13/048C03C15/00C03C25/285
Inventor 侯超奇折胜飞郭海涛高菘张岩李艺昭
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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