OPTICAL SWITCHING METHOD AND APPARATUS, AND LIQUID CRYSTAL ON SILICON AND WAVELENGTH SELECTIVE SWITCH

This application provides an optical switching method and apparatus, applied to an optical communication network, an optical switching network, and a digital center network. The method includes: generating K images that are consecutive in time sequence, where a first wavelength channel and a second wavelength channel are switched to a blocking state through a same image in the K images, and a value of K depends on a quantity of times that attenuation adjustment is performed for switching the first wavelength channel from a normal state to the blocking state; and sending information about the K images to an optical switching element, to enable the optical switching element to perform attenuation adjustment on the first wavelength channel and the second wavelength channel. Attenuation adjustment for switching at least two wavelength channels to the blocking state is implemented based on a same image, so that the at least two wavelength channels can be simultaneously switched to the blocking state, to avoid frequent power fluctuation that is of a multiplexing optical signal and that is caused by switching the at least two wavelength channels to the blocking state at different moments, and improve stability of an optical communication system.