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Manufacturing method of optical fiber and optical fiber

A manufacturing method and fiber optic technology, which can be applied to glass fibers, manufacturing tools, clad fibers, etc., and can solve problems such as winding collapse

Active Publication Date: 2021-09-28
FUJIKURA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, in order to suppress the deformation of this covering, if the winding tension is reduced, winding collapse and the like are likely to occur.

Method used

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  • Manufacturing method of optical fiber and optical fiber
  • Manufacturing method of optical fiber and optical fiber
  • Manufacturing method of optical fiber and optical fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Using a large optical fiber preform M with Δβ of 9300 rad / m, an optical fiber with a total length of 2000 km was produced at a drawing speed of 2000 m / min, and wound on the winding bobbin 7 . That is, the "winding length (see Table 1)" wound around the winding bobbin 7 was 2000 km. For the Young's modulus of the cover material used at this time, the main layer is E p =1.0MPa, sublayer is E s = 1000 MPa. The outer diameter of the bare optical fiber is The outer diameter r of the main layer p for The outer diameter of the sublayer r s for The winding conditions were as follows: the winding tension F was 100 gf, and the winding thickness h was 50 mm. Use a diameter D of winding bobbin. The material of the winding bobbin 7 is aluminum, and the bobbin surface coefficient in this case is μ=3. The "winding time (see Table 1)" from the start of spinning to the end of spinning was 33.3 hours. In addition, the "storage time (see Table 1)" from the completion of spi...

Embodiment 2

[0093] Using a large optical fiber preform M with Δβ of 9300 rad / m, an optical fiber with a total length of 2000 km was produced at a drawing speed of 2000 m / min, and wound on the winding bobbin 7 . For the Young's modulus of the cover material used at this time, the main layer is E p =1.0MPa, sublayer is E s = 1000MPa. The outer diameter of the bare optical fiber is The outer diameter r of the main layer p for The outer diameter of the sublayer r s for The winding conditions were as follows: the winding tension F was 100 gf, and the winding thickness h was 50 mm. Use a diameter D of winding bobbin. The material of the winding bobbin 7 is aluminum, and the bobbin surface coefficient in this case is μ=3. Holding time T from the start of spinning until the completion of unwinding in the next process w for 120 hours.

[0094] The result is: Covering Coefficient K coat is 1196, the strain sensitivity factor T ε / KL for 936. And, the monolayer strain ε n At the bo...

Embodiment 3

[0101] Using a large optical fiber preform M with Δβ of 9300 rad / m, an optical fiber with a total length of 2000 km was produced at a drawing speed of 2000 m / min, and wound on the winding bobbin 7 . For the Young's modulus of the cover material used at this time, the main layer is E p =1.0MPa, sublayer is E s = 1000 MPa. The outer diameter of the bare optical fiber is The outer diameter r of the main layer p for The outer diameter of the sublayer r s for The winding conditions were as follows: the winding tension F was 120 gf, and the winding thickness h was 50 mm. Use a diameter D of winding bobbin. The material of the winding bobbin 7 is aluminum, and the bobbin surface coefficient in this case is μ=3. Holding time T from the start of spinning until the completion of unwinding in the next process w for 100 hours.

[0102] The result is: Covering Coefficient K coat is 1196, the strain sensitivity coefficient T ε / KL for 936. And, the monolayer strain ε n At ...

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Abstract

A method for manufacturing an optical fiber and an optical fiber, wherein, the method for manufacturing an optical fiber is provided with a covering layer on the bare optical fiber, and in the above method for manufacturing an optical fiber, the optical fiber is wound on bobbin process so that the strain gage factor T ε / KL greater than 0 and less than 973, and make the single layer strain ε n 0.01 or more.

Description

technical field [0001] The present invention relates to a method of manufacturing an optical fiber and an optical fiber. [0002] This application claims priority based on Japanese Patent Application No. 2017-154288 filed in Japan on August 9, 2017, and its content is cited here. Background technique [0003] Conventionally, there has been used a method of manufacturing an optical fiber having a step of winding an optical fiber having a coating on a bare optical fiber around a bobbin. For example, Japanese Patent Application Laid-Open No. 5-273416 discloses a method in which the tension when winding an optical fiber around a bobbin (hereinafter referred to as winding tension) increases as the winding radius increases. decrease. In this method, an OTDR (Optical Time Domain Reflectometer: Optical Time Domain Reflectometer) is used to measure the transmission loss of the optical fiber in the state wound around the bobbin. Suppressing the case where the value of the loss is m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/03C03C25/105C03C25/26
CPCC03B37/032C03C25/26B29D11/00721B65H55/04B65H2701/32G02B6/02395B29D11/00663B65H54/02G02B1/045G02B6/4457
Inventor 冈田健志
Owner FUJIKURA LTD