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Optical fiber base material production method, optical fiber base material, and optical fiber production method

An optical fiber base material and a technology for a manufacturing method, which are applied in the field of optical fiber base material manufacturing, can solve problems such as difficulty in securing the length, and achieve the effect of shortening the length of the base material and realizing a longer size

Active Publication Date: 2020-01-17
THE FUJIKURA CABLE WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the length of the remaining base material is made longer, it may be difficult to ensure the length of the drawing effective area in the base material in the axial direction

Method used

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  • Optical fiber base material production method, optical fiber base material, and optical fiber production method
  • Optical fiber base material production method, optical fiber base material, and optical fiber production method
  • Optical fiber base material production method, optical fiber base material, and optical fiber production method

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Effect test

no. 1 approach

[0118] First, refer to Figure 1 to Figure 6 A first embodiment of the method for manufacturing an optical fiber preform, the optical fiber preform, and the method for manufacturing an optical fiber according to the present invention will be described.

[0119] According to the manufacturing method of the optical fiber preform of this embodiment, the Figure 6 Fiber preform 1A is shown.

[0120]

[0121] Here, in this embodiment, the direction along the central axis of the optical fiber preform 1A is referred to as the axial direction. In addition, observation on a cross-section perpendicular to the central axis is referred to as cross-sectional observation, and observation on a cross-section along the central axis is referred to as longitudinal cross-sectional observation.

[0122] In addition, each component will be described assuming that the end on the right side of the drawing is a first end portion and the end on the left side will be a second end portion. For examp...

no. 2 approach

[0193] Next, refer to Figure 8 ~ Figure 14 A second embodiment of the method for producing an optical fiber preform, the optical fiber preform, and the method for producing an optical fiber according to the present invention will be described.

[0194] In addition, in Figure 8 ~ Figure 14 in, right with Figure 1 to Figure 6 The same components are denoted by common reference numerals, and descriptions thereof are omitted or simplified.

[0195] Figure 14 It is a longitudinal sectional view showing the optical fiber preform 1B of this embodiment.

[0196] According to the manufacturing method of the optical fiber preform of this embodiment, the Figure 14 Fiber preform 1B shown.

[0197] In the manufacturing method of the optical fiber preform of this embodiment, as Figure 8 As shown, dummy quartz tubes 131 and 132 are connected to both ends of the cladding glass body 11 in the axial direction by welding (dummy quartz tube welding process).

[0198] In addition, herei...

no. 3 approach

[0247] Next, refer to Figure 15 ~ Figure 20 A third embodiment of the method for producing an optical fiber preform, the optical fiber preform, and the method for producing an optical fiber according to the present invention will be described.

[0248] Figure 20 It is a longitudinal sectional view showing the optical fiber preform 1C of this embodiment.

[0249] According to the manufacturing method of the optical fiber preform of this embodiment, the Figure 20 Fiber preform 1C shown.

[0250] Such as Figure 15 etc., in the method for manufacturing an optical fiber preform of this embodiment, a cylindrical cladding glass body 21 is used. The cladding glass body 21 forms a part of the cladding of the optical fiber drawn from the optical fiber preform 1C.

[0251] In the manufacturing method of the optical fiber preform of this embodiment, as Figure 15 As shown, first, a plurality of glass rods 23 are inserted into the through holes 22 inside the clad glass body 21 (r...

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Abstract

An optical fiber base material production method having: a rod insertion step in which a glass rod (14) is inserted into a through-hole (12) that penetrates a cladding glass body (11); a dummy rod integration step in which a solid dummy quartz rod (15) that closes a first opening (12a) in the through-hole (12) is integrated with a first end section 11a of the cladding glass body (11); and a tip sealing step in which a second opening (12b) in the through-hole (12) that opens to a second end section (11b) of the cladding glass body (11) is blocked and an internal hole (18) is formed which is sealed at both ends of the through-hole (12).

Description

technical field [0001] The present invention relates to a method for manufacturing an optical fiber base material, an optical fiber base material, and a method for manufacturing an optical fiber. [0002] This application claims priority based on Japanese Patent Application No. 2017-154691 filed in Japan on August 9, 2017, and Japanese Patent Application No. 2018-122427 filed in Japan on June 27, 2018, the contents of which are incorporated herein by reference . Background technique [0003] In order to increase the transmission capacity of optical fiber communication systems, optical fibers of various structures have been proposed in recent years. As an example, a multi-core optical fiber can be mentioned, for example. A multi-core optical fiber has a structure in which multiple cores are surrounded by a single cladding, and multiple signals can be transmitted using light propagating through each core. Therefore, a multi-core optical fiber can dramatically increase the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/012C03B37/027G02B6/02
CPCG02B6/02C03B23/207C03B37/01222C03B37/01251C03B37/0128C03B37/02754G02B6/02042C03B37/02718
Inventor 安间淑通竹永胜宏福本良平
Owner THE FUJIKURA CABLE WORKS LTD
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