Optischer Verstärker

摘要

There is provided an optical amplifying apparatus comprising an optical isolator and applicable for various measurement and monitoring of optical transmission systems involving bidirectional telecommunication and retrogressive light. Such an optical amplifying apparatus specifically comprises an optical transmission line 3 for conveying signal light p1, an optical amplifier 1 connected to an optical transmission line 2 for amplifying signal light p1 and an optical isolator 2 connected to the optical transmission line 3 for suppressing oscillation of the optical amplifier 1 caused by reflected signal light p1, to which optical devices 4, 5 connected to the optical transmission line 3 for isolating and combining signal light p1 and retrogressive light p2 are added. As signal light and retrogressive light can be independently isolated and combined together in an optical amplifying apparatus according to the invention, it can be used for bidirectional telecommunication, measurement and monitoring of various optical transmission systems utilizing retrogressive light and other applications.