Optical fiber base material and method for manufacturing optical fiber
A technology of optical fiber base material and glass optical fiber, which is applied in the direction of manufacturing tools, clad optical fiber, optical waveguide and light guide, etc. It can solve the problems that cannot be used as products and does not meet the specifications, and achieve the effect of shortening the process time and shortening the start time
Active Publication Date: 2020-04-14
FURUKAWA ELECTRIC CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, the tip portion of the optical fiber preform may include a defective portion in which the ratio of the outer diameter of the core to the outer diameter of the cladding does not meet the specifications.
The glass optical fiber drawn from the above-mentioned tip part cannot be used as a product because the core diameter and cladding diameter do not meet the specifications.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment approach
[0029] figure 1 is a schematic diagram of an optical fiber preform according to an embodiment of the present invention. The optical fiber preform 1 is made of, for example, glass such as quartz-based glass. For example, silica-based glass fine particles are deposited on the outer periphery of a target rod made of silica-based glass to form a porous layer, and the porous layer is dehydrated and vitrified by sintering to manufacture an optical fiber preform 1 . The optical fiber preform 1 includes a cylindrical portion 1a, a tapered portion 1b, and a dropped portion 1c.
[0030] The radius of the cylindrical portion 1a is r and is substantially constant, and the cylindrical portion 1a has a cylindrical shape extending in the longitudinal direction. The cylindrical portion 1a is a portion where a qualified glass optical fiber to be a product is drawn. The tapered portion 1b is a portion that is arranged adjacent to the columnar portion 1a and whose radius decreases along the l...
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
| Property | Measurement | Unit |
|---|---|---|
| radius | aaaaa | aaaaa |
| radius | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to an optical fiber base material and a method for manufacturing an optical fiber. The optical fiber base material has: a cylindrical portion, the radius of which is r and is approximately constant; and a tapered portion, which is arranged adjacent to the cylindrical portion in the length direction and whose radius decreases along the length direction, the tapered portion has: A first tapered portion having a portion varying in radius from 0.9r to 0.6r; and a second tapered portion having a portion varying in radius from 0.4r to 0.15r, the first tapered portion In the portion where the radius varies between 0.9r and 0.6r, the diameter is reduced so as to form a maximum angle (θ1) between 40° and 60° with respect to the cylindrical portion, and the second tapered portion In the portion where the radius varies between 0.4r and 0.15r, the diameter is reduced so as to form an average angle (θ2) between 5 degrees and 30 degrees with respect to the central axis in the longitudinal direction, and the tapered The volume of the portion is 45% or less of the volume of a cylinder having the same outer diameter and the same length as the maximum outer diameter of the tapered portion.
Description
technical field [0001] The invention relates to an optical fiber base material and a method for manufacturing an optical fiber. Background technique [0002] One end of an optical fiber base material made of glass is heated and melted in a drawing heating furnace, and the glass optical fiber is drawn from this end, and a coating made of resin or the like is formed on the outer periphery of the drawn glass optical fiber using a drawing die, thereby manufacturing an optical fiber . [0003] However, the tip portion of the optical fiber preform may include a defective portion in which the ratio of the outer diameter of the core to the outer diameter of the clad portion does not meet the specifications. The glass optical fiber drawn from the tip portion as described above cannot be used as a product because the core diameter and the cladding diameter do not meet the specifications. The tip portion of the above-mentioned optical fiber preform is used as a drawing for adjusting ...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/012C03C19/00G02B6/02
CPCC03B37/0253C03B2205/40C03B2205/44C03B2205/45C03B2205/47C03B2205/72C03B37/01251C03B37/02772C03B37/012G02B6/02
Inventor 川崎光广
Owner FURUKAWA ELECTRIC CO LTD