Patent ID: 8606104

Claim:
A wavelength selective switch including a substrate, wherein, on the substrate, the wavelength selective switch comprising: at least one input port from which, wavelength-multiplexed light is made to be incident in the wavelength selective switch, a dispersive element which receives the light from the input port, and disperses the light, a light condenser element which converges light for each wavelength which has been dispersed by the light dispersive element, a light deflecting member including a plurality of deflecting elements, which is capable of deflecting light for each wavelength from the light condenser element, independently for each wavelength, an output port which receives light for each wavelength which has been deflected by the light deflecting member, and a driving mechanism which drives at least the light deflecting member, and wherein drive of the light deflecting member by the driving mechanism is a translational drive in a direction of dispersion of wavelength with respect to the substrate, wherein the plurality of deflecting elements are driven as a whole.