Process for improving the transmission characteristics of optica

Details Process for improving the transmission characteristics of optica Process for improving the transmission characteristics of optica

1981-06-15

1983-06-21

Fisher, Richard V.

Glass manufacturing

Processes

Forming product or preform from molten glass

427163, C03B 37075

Patent

active

043892302

ABSTRACT:
In order to improve the transmission characteristics of optical fibers drawn from the preforms manufactured by vapor deposition of silica on an inner wall surface of a supporting tube of glass, the tube is subjected to a two-stage heat treatment with deuterium whereby OH.sup.- groups at least on the inner tube surface are isotopically replaced by OD.sup.- groups. This pretreatment can be carried out in the same apparatus which is subsequently used for producing the preform.

REFERENCES:
patent: 3791714 (1974-02-01), Maurer
Kato et al., "Isotopic Chemical Vapor Deposition . . . " Applied Optics, Jun. 1977, vol. 16, No. 6, pp. 1453 and 1454.

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