Abstract:A transit transmission system for a long‐distance digital transmission line using a submarine optical fiber cable is expected to be used at water depth of 8000 m and transit distance of 40 km. This paper introduces a fundamental design for a submarine optical‐fiber cable for deep‐sea use, which can block water propagation within the cable if it is cut accidentally on the sea bed. Evaluations of the water‐blocking properties and signal transmission characteristics of the cable are presented also. The water prop… Show more
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