Optical switch is a kind of optical path controlling device, with the ability to control and switch the optical path. It is significant in optical communications, mainly used for multi-channel fiber
monitoring in optical transmission system, LAN multi light source/detector automatically switching and optical sensor multi-points dynamic monitoring system; optical fiber, optical component, and
field optical cable testing in optical testing system; optical device installation and adjustment. MxN optical switch can switch one of the input channels to one of the output channels.