Plastic optical fiber and its mfg. method

A technology of plastic optical fiber and manufacturing method, which is applied in the directions of optics, light guides, optical components, etc., can solve the problems of not yet made SM-type optical fibers and high frequency bands, and achieve the effect of low connection cost and easy use.

Inactive Publication Date: 2003-02-19
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such high-performance GI-type fibers have not yet been realized
[0006] In addition, the frequency band of SM-type optical fiber is theoretically higher than that of GI-type optical fiber, which has been practically used in glass optical fiber, but it has not yet been made into SM-type optical fiber composed of amorphous fluoropolymer without C-H bond.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0050] The present invention will be described below based on specific examples, but the present invention is not limited to these specific examples.

Synthetic example 1

[0052] 30 g of perfluoro(3-oxa-1,6-quinadiene) [hereinafter referred to as "PBVE"], 150 g of ion-exchanged water, 10 g of methanol, and 0.15 g of diisopropyl peroxycarbonate as a polymerization initiator A pressure-resistant glass autoclave having an internal volume of 200 ml was charged. After replacing the inside of the apparatus with nitrogen three times, suspension polymerization was performed at 40° C. for 22 hours. As a result, 26 g of a polymer (hereinafter referred to as "polymer A") was obtained. The intrinsic accuracy [η] of Polymer A is 0.24 at 30°C in PBTHF. Polymer A had a glass transition temperature of 108° C. as determined by differential scanning calorimetry (hereinafter referred to as “DSC”), and was a tough transparent glassy polymer at room temperature. In addition, the 10% thermal decomposition temperature is 468°C and the refractive index is 1.342.

Synthetic example 2

[0054] PBVE27g, perfluoro (2,2-dimethyl-1,3-dioxol) [hereinafter referred to as "PDD"] 3g, ion-exchanged water 150g, methanol 10g and diisopropyl peroxycarbonate 0.15 g is charged into a pressure-resistant glass autoclave with an internal volume of 200 ml. After replacing the inside of the apparatus with nitrogen three times, suspension polymerization was performed at 40° C. for 22 hours. As a result, 27 g of a polymer (hereinafter referred to as "polymer B") was obtained.

[0055] The intrinsic accuracy [η] of Polymer B is 0.25 at 30°C in PBTHF. According to IR spectrum analysis, the content of the repeating unit formed by the PDD polymerization reaction (hereinafter referred to as "PDD polymerization unit", the same hereinafter) was 10 mol%. The glass transition temperature of polymer B measured by DSC was 115° C., and it was a tough transparent glassy polymer at room temperature. In addition, the 10% thermal decomposition temperature is 465°C, and the refractive index is...

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Abstract

The present invention provided an SM plastic optical fiber which can be easily and safely handled, which is low-cost for connection, which can be installed in a short distance, which has a wide range, large transmission capacity and low transmission loss and which can be interconnected with a glass SM optical fiber, and to provide a method for manufacturing the fiber. The plastic optical fiber has the core made of a non-crystalline fluorine-containing polymer (a) having substantially no C-H bond and the clad made of a fluorine-containing polymer (b) having a lower refractive index by >=0.001 than that of the fluorine-containing polymer (a), and the fiber has a single mode as the propagation mode. The plastic optical fiber is manufactured by melt extrusion or by melt spinning from a base material.

Description

technical field [0001] The present invention relates to a communication plastic optical fiber having a single-mode (hereinafter referred to as "SM") waveguide mode and a high transmission frequency band, and a method for manufacturing the same. In more detail, it involves transparency, heat resistance, moisture resistance, atmospheric corrosion resistance, chemical corrosion resistance, flame retardancy and flexibility, and is especially suitable for factory wiring and sewers that require chemical corrosion resistance. A communication plastic optical fiber having a high transmission band of a waveguide mode SM for wiring and the like, and a method for producing the same. Background technique [0002] Conventionally, SM-type optical fibers are known to be made of glass, and they have been put into practical use in large-capacity long-distance trunk systems. In recent years, with the popularization of the Internet and digitization of communication systems, the use of optical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04
CPCG02B1/045G02B6/02033C08L37/00C08L27/12
Inventor 杉山德英成富正树
Owner ASAHI GLASS CO LTD
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