| 摘要 |
PROBLEM TO BE SOLVED: To accurately determine the abnormality of an optical device.SOLUTION: In an optical amplifier 100b relating to this embodiment 1, an abnormality determination part 112 obtains a first monitor value from a PD 109 and obtains a second monitor value from an optical amplification module 111. Then, the abnormality determination part 112 accurately determines the abnormality of the optical device by comparing the first monitor value with a first stipulated value, also comparing the second monitor value with a second stipulated value, and executing abnormality determination on the basis of respective comparison results. |
