Nobuo TOMITA

NTT Access Network Systems Laboratories, Tokai-mura, Naka-gun, Ibaraki, 319-11 Japan

(Received June 20, 1996; Accepted September 9, 1996)

This paper describes photonic sensing methods which are applied to a fiber maintenance system. They are designed for fault sensing in fiber lines, water sensing in cable joints, and future technologies.

Key words : photonic sensing, optical time domain reflectometer, fiber network, test and monitoring system, optical sensor