Beam path test monitoring system

Abstract

PURPOSE: To sensitively test and monitor connection loss due to shaft shift and bending loss separately without the deterioration of transfer quality by using both longer and shorter tesing wavelength than signal wavelength and using a light band path filter. CONSTITUTION: Light pulse testers 31, 32 have both longer and shorter wavelength testing light than signal light, and a light band path filter 21 is provided to transmit the signal light between an optical fiber 1 and a light coupler 2 and shield the testing light. With the longer wavelength testing light than the signal light, the backward scattering waveform of the optical fiber 1 is obtained to sensitively test and monitor the bending loss of the optical fiber 1. With the shorter wavelength testing light than the signal light, the backward scattering waveform of the optical fiber 1 is obtained to sensitively test and monitor the connection loss of the optical fiber 1. In this case, both longer and shorter wavelength testing light is shielded by the light band path filter 2 to prevent the deterioration of transfer quality. COPYRIGHT: (C)1992,JPO&Japio

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    JP-2013148561-AAugust 01, 2013Fujikura Ltd, 株式会社フジクラ光線路監視システム、試験装置、光線路監視方法、およびプログラム
    US-6611322-B1August 26, 2003Anritsu CorporationOptical time domain reflectometer which measures an optical fiber with different wavelengths according to an order and collectively displays waveform data and a list of events for each waveform in the same screen
    US-9097868-B2August 04, 2015Prysmian S.P.AMethod for checking the correct installation of a bend-insensitive optical cable and optical cable suitable for the method thereof
    WO-0118520-A1March 15, 2001Anritsu CorporationReflectometre optique a domaine temporel
    WO-2011138807-A1November 10, 2011Prysmian S.P.A.Procédé pour contrôler l'installation correcte d'un câble optique insensible à la courbure et câble optique approprié au procédé associé