| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical channel monitor that allows suppressing cost of a device or a circuit that monitors a plurality of WDM signals.SOLUTION: An optical channel monitor includes: a first optical device having first to third optical ports, introducing incident light of the first optical port to the second optical port, and introducing incident light of the second optical port to the third optical port; a second optical device having fourth to sixth optical ports, introducing incident light of the fourth optical port to the fifth optical port, and introducing incident light of the fifth optical port to the sixth optical port; an optical filter having a seventh optical port optically connected to the second optical port and an eighth optical port optically connected to the fifth optical port, and transmitting a specified wavelength between the seventh optical port and the eighth optical port; a first optical receiver detecting output light of the sixth optical port of the second optical device; and a second optical receiver detecting optical light of the third optical port of the first optical device. |
