Optical amplifier repeater

摘要

An optical amplifier repeater having: a first optical amplifier that amplifies main signal light and supervisory signal light transmitted on an up optical-fiber transmission line; a second optical amplifier that amplifies main signal light and supervisory signal light transmitted on a down optical-fiber transmission line; a transfer unit that transfers part of supervisory signal light transmitted on the up optical-fiber transmission line onto the down optical-fiber transmission line, and transfers part of supervisory signal light transmitted on the down optical-fiber transmission line onto the up optical-fiber transmission line. The transfer unit has an optical amplifier output side transfer unit that transfers supervisory signal light reflected by a first light-reflecting device inserted to the output side of the first optical amplifier to the output side of the second optical amplifier, and transfers supervisory signal light reflected by a second light-reflecting device inserted to the output side of the second optical amplifier to the output side of the first optical amplifier.