OPTICAL TRANSMISSION LINE REMOTE TESTING/MONITORING METHOD, AND OPTICAL TRANSMISSION LINE REMOTE TESTING/MONITORING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a remote testing/monitoring method of an optical transmission line, which remotely performs a continuity test of the optical transmission line (optical fiber core wire) regardless of the bent loss characteristic of the optical transmission line (optical fiber core wire).;SOLUTION: Ultrasonic wave is excited in an ultrasonic excitation part P of the optical fiber core wire 4 by an ultrasonic excitation device 5 disposed in an ultrasonic excitation section P of the optical fiber core wire 4, thereby causing leak of light in the ultrasonic excitation section P of the optical fiber core wire 4 by an acousto-optic effect by the ultrasonic wave. Intensity variation of back scattered light in the optical fiber core wire 4 at this time is detected by an OTDR (Optical Time Domain Reflectometer) 2 disposed at an end of the optical fiber core wire 4, thereby detecting the conduction of light in the optical fiber core wire 4.;COPYRIGHT: (C)2009,JPO&INPIT