Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical fiber manufacturing method

A manufacturing method and optical fiber technology, applied in the direction of manufacturing tools, clad optical fiber, glass manufacturing equipment, etc., can solve the problems of slowing down the drawing speed, unreasonable optical fiber temperature history, lengthening the annealing furnace, etc., and achieve the effect of reducing transmission loss

Active Publication Date: 2020-07-31
FUJIKURA LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the conventional manufacturing method in which the temperature history of such an optical fiber is not rationalized, the annealing furnace is excessively lengthened, resulting in excessive equipment investment, or the drawing speed is excessively slowed down, and productivity is impaired.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical fiber manufacturing method
  • Optical fiber manufacturing method
  • Optical fiber manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Hereinafter, preferred embodiments of the optical fiber manufacturing method according to the present invention will be described in detail with reference to the drawings.

[0028] figure 1 It is a flowchart showing the steps of the optical fiber manufacturing method of the present invention. Such as figure 1 As shown, the manufacturing method of the optical fiber of the present embodiment includes a drawing step P1, a pre-cooling step P2, an annealing step P3, and a rapid cooling step P4. These steps are described below. In addition, figure 2 It is a figure which shows typically the structure of the apparatus used in the manufacturing method of the optical fiber of this embodiment.

[0029]

[0030] The drawing step P1 is a step of drawing one end of the optical fiber base material 1P in the drawing furnace 110. First, an optical fiber base material 1P made of glass having the same refractive index distribution as the core and cladding constituting the desired optical fi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a method for producing an optical fiber, comprising: a drawing step (P1) of drawing a base material (1P) for an optical fiber in a drawing furnace (110); The annealing step (P3) in which the optical fiber is slowly cooled in the annealing furnace (121), when the optical fiber enters the annealing furnace (121), the temperature difference between the temperature of the optical fiber and the fictive temperature of the glass constituting the core contained in the optical fiber is higher than 20 °C is lower than 100 °C, whereby the transmission loss of the optical fiber is easily reduced.

Description

Technical field [0001] The present invention relates to a method of manufacturing an optical fiber. Background technique [0002] In order to realize the long-distance optical transmission distance and the high-speed optical transmission speed in the optical fiber communication system, the optical signal-to-noise ratio will be forced to increase, so it is required to reduce the transmission loss of the optical fiber. At present, when the optical fiber manufacturing method is highly refined, it is thought that the transmission loss due to the impurities contained in the optical fiber has almost been reduced to the limit. The main cause of the remaining transmission loss is the scattering loss caused by fluctuations in the structure and composition of the glass constituting the optical fiber. This phenomenon cannot be avoided because the optical fiber is made of glass. [0003] As a method of reducing the fluctuation of the structure of the glass, a technique of slowly cooling the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/027G02B6/02
CPCG02B6/02C03B37/02727C03B37/0253C03B37/032
Inventor 北村隆之今濑章公
Owner FUJIKURA LTD