Raman amplification device and raman amplification method

Abstract

A Raman amplification device that Raman-amplifies an optical signal in a transmission line by Raman pumping, the Raman amplification device includes a processor configured to monitor a first signal communicated by the optical signal, set a threshold level of an alarm (WDMLOS) detection for determining whether the alarm is output at a time of transmission line disconnection in accordance with a monitoring result of the first signal, determine whether auto power shut down (APSD) control is performed by using a first APSD determination condition based on integration of optical supervisory channel (OSC) disconnection and the alarm, in a case where the monitoring result of the communicated first signal exceeds a predetermined condition, and determine whether the APSD control is performed by using a second APSD determination condition based on the OSC disconnection, in a case where the monitoring result of the communicated first signal is lower than the predetermined condition.

Dependencies are inferred from the claim text.