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|1. (WO2018035865) SIGNAL MONITORING METHOD AND APPARATUS FOR WAVELENGTH SELECTIVE SWITCH (WSS)|
|Applicants:||HUAWEI TECHNOLOGIES CO.,LTD.
|Title:||SIGNAL MONITORING METHOD AND APPARATUS FOR WAVELENGTH SELECTIVE SWITCH (WSS)|
A signal monitoring method and apparatus for a wavelength selective switch (WSS). The method comprises: according to an input WDM signal, encoding a phase of a first optical engine, so that the WDM signal is split into a transmission signal and a monitoring signal after passing through the first optical engine; inputting the monitoring signal to a second optical engine arranged at an output side optical grating; and controlling the second optical engine so that same rotates in a wavelength plane of the WDM signal, so that monitoring light with a set wavelength in the monitoring signal is output from the second optical engine at a pre-set angle. The method and apparatus provided in the present invention solve the problems in the prior art that a monitoring scheme for an optical signal is time-consuming and a quick fault positioning requirement for a future network cannot be satisfied.