Accession Number : ADP002556

Title :   Design and Test Results of Optical Fiber Units for Optical Submarine Cable,

Corporate Author : KOKUSAI DENSHIN DENWA CO LTD TOKYO (JAPAN)

Personal Author(s) : Yamamoto,H. ; Mochizuki,K. ; Namihira,Y. ; Niiro,Y.

Report Date : 17 NOV 1983

Pagination or Media Count : 8

Abstract : This paper describes the design and test results of two types of optical submarine cables. One is an embedded-silicone-rubber type optical fiber unit. The optical loss change is very small under various test conditions as microbending is hard to occur in this fiber unit. For example, the temperature coefficient was about 0.2 mdB/km/C. The manufacturing results of 30 km continuous length of this type unit are also described. The other fiber unit has a strain relaxing effect as each fiber is surrounded with an extremely soft silicone gel and a hard nylon jacket, and these six fibers are stranded. The strain relaxing effect will contribute toward reducing the required screening level of optical fibers used in optical submarine cables. About 0.2 % strain relaxing effect was obtained in our experimentally manufactured optical fiber unit. It will be expected that the required screening level will be reduced about 0.6%. (Author)

Descriptors :   *Cables, *Optical equipment, *Submarines, Fiber optics transmission lines, Optical communications, Reliability, Mechanical properties, Underwater

Distribution Statement : APPROVED FOR PUBLIC RELEASE