Optical fiber hermetic fixing structure of feedthrough for optic

Electricity: conductors and insulators – Feedthrough or bushing – Compression

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Details

350 9623, 174 70S, G02B 636

Patent

active

046538461

ABSTRACT:
An optical fiber hermetic fixing structure of a feedthrough for an optical submarine repeater in which at least one optical fiber is introduced into a fluid-tight pressure-resistant housing of an optical marine repeater. Optical fibers are introduced and disposed in a through opening defined between a metal fiber-supporting guide and a metal sealing sleeve circumferentially of the fiber-supporting guide. The guide has a somewhat reduced diameter adjacent an end of the through opening so that the through opening has a greater transverse dimension along this part adjacent a seawater end of the feedthrough. This part of the through opening is filled with a low temperature melting metal about and between the optical fibers extending therethrough. The low melting temperature metal extends out of the through opening with a generally conical cross section configuration. A protective cover cap is disposed coaxial with the sleeve and fiber-supporting guide and through which the optical fibers extend longitudinally. The protective cover cap is filled with a liquid filler.

REFERENCES:
patent: 4166672 (1979-09-01), Gilbert
patent: 4330171 (1982-05-01), Malsot et al.
patent: 4345816 (1982-08-01), Nakai et al.
patent: 4487474 (1984-12-01), Nishie et al.

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