OPTICAL SIGNAL MONITORING METHOD, SIGNAL MONITORING DEVICE AND OPTICAL NETWORK SYSTEM

摘要

Embodiments of the present invention disclose an optical signal monitoring and control method, including: receiving a first optical signal, performing optical-to-electrical conversion on the first optical signal, and outputting a converted first electrical signal; monitoring the first electrical signal, and acquiring a monitored power of the first electrical signal; adjusting the monitored power of the first electrical signal according to a target monitored power of the first electrical signal, and outputting a second electrical signal, so that a monitored power of the second electrical signal is the target monitored power; and performing optical-to-electrical conversion on the second electrical signal according to a correspondence between the target monitored power of the first electrical signal and a target extinction ratio of the first optical signal, and outputting a converted second optical signal, where the second optical signal is an optical signal that has a target extinction ratio. Correspondingly, the embodiments of the present invention further disclose a related apparatus and system. The embodiments of the present invention can implement precise control on an extinction ratio of an optical signal.