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Optical fiber and method and apparatus for manufacturing optical fiber

一种制造方法、光纤线的技术，应用在玻璃纤维拉丝装置、制造工具、包层光纤等方向，能够解决很难PMD、PMD增加等问题，达到抑制PMD的增加、可靠且容易制造的效果

Active Publication Date: 2012-08-15
FUJIKURA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in final products such as cables, there is the problem that it is difficult to reliably and stably suppress the increase of PMD caused by external factors.
[0013] As described above, conventionally, it has been difficult to stably and reliably suppress the increase in PMD caused by external factors such as lateral pressure applied to the optical fiber or anisotropic external force such as bending in products of the final use form.

Method used

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  • Optical fiber and method and apparatus for manufacturing optical fiber
  • Optical fiber and method and apparatus for manufacturing optical fiber
  • Optical fiber and method and apparatus for manufacturing optical fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] use figure 1 The fiber optic cable manufacturing device shown, and using image 3 The device shown is used as the twist imparting device in the manufacturing device, and the elastic twist imparted is manufactured on the basis of the silica glass-based optical fiber having a two-layer coating structure having the characteristics of a general single-mode optical fiber according to the above-mentioned method of the present invention. (twisted) fiber optic cable. The spinning speed (drawing speed) from the optical fiber preform was set to 2000 mm / min. In addition, the coating device employs a 2-layer simultaneous coating method (wet on wet method) in which two types of coating resins are coated at one position. UV curable urethane acrylate resin (Young's modulus when hardened is 0.5MPa) is used as the resin (first material) of the primary cover layer, UV curable urethane acrylate resin (Young's modulus when hardened is 0.5MPa) 1000MPa) as the resin (second material) of t...

Embodiment 2

[0106] use Figure 8 The fiber optic cable manufacturing device shown, and using image 3 The device shown is used as the twist imparting device 26 in the manufacturing apparatus. According to the above-mentioned method of the present invention, it is manufactured on the basis of a silica glass-based optical fiber with a double-layer coating structure having the characteristics of a general single-mode optical fiber. Twisted (twisted) fiber optic cable. The spinning speed (drawing speed) from the optical fiber preform was set to 1500 mm / min. In addition, as a cover-hardening method, such as Figure 8 As shown, different methods (wet on dry method) of coating and covering resin are applied to two positions respectively. UV curable urethane acrylate resin (Young's modulus when hardened is 1.0MPa) is used as the resin (first material) of the primary cover layer, UV curable urethane acrylate resin (Young's modulus when hardened is 500MPa) ) as a resin (second material) for the...

Embodiment 3

[0112] In the same manner as in Example 2, an optical fiber cable with an elastic twist (twist) and a two-layer coating structure was produced. In addition, as for the viscosity of the covering resin at the time of covering (liquid state), the viscosity of the first material was adjusted to 3 Pa·sec and the viscosity of the second material was adjusted to 0.1 Pa·sec in the same manner as in Example 2. The swing angle and the swing speed of the twist imparting device are set so that the twist imparted by the twist imparting device to the optical fiber, the curve in the length direction of the optical fiber is a trapezoidal wave in which the twist direction is periodically reversed, and the period T is 30m, the maximum twist angle MA of the cumulative twist angle is 120000°. The optical fiber that has passed through the twist imparting device is extracted by a take-out machine, and wound up by a winder via a dancer pulley to obtain an optical fiber with elastic twist (twist) app...

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Abstract

An optical fiber includes a bare optical fiber portion, to which elastic torsion is applied, and a coating layer, which coats the bare optical fiber portion, is formed of curable resin, and causes elastic repulsion against resilience occurring in the bare optical fiber portion so that the elastic torsion applied to the bare optical fiber portion is held.

Description

technical field [0001] The present invention relates to an optical fiber represented by a silica glass optical fiber and a method of manufacturing the optical fiber, and in particular to a technique for reducing polarization mode dispersion (Polarization Mode Dispersion; External disturbances such as bending, an optical fiber cable, a method of manufacturing the optical fiber cable, and a manufacturing apparatus in which an increase in PMD is small. [0002] This application claims the priority of Japanese Patent Application No. 2011-028387 for which it applied on February 14, 2011, and uses the content here. Background technique [0003] As is well known, PMD refers to a phenomenon in which a propagation time difference (delay difference) occurs between two orthogonal polarization mode components in an optical fiber. In addition, if the PMD increases, in digital transmission, waveform degradation occurs in the signal light transmitted through the optical fiber, and it is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02C03B37/025
CPCC03B37/032C03B37/02745C03B2203/06C03B2203/18C03B2203/19C03B2205/06C03C25/1065G02B6/02285
Inventor 冈田健志
Owner FUJIKURA LTD
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