Patent ID: 7317850

Claim:
An optical switch comprising: at least one input optical fiber to which optical signals of a plurality of wavelengths are input upon multiplexing; at least one output optical fiber; a wavelength dispersive element which performs a spectral separation of the optical signal from the input optical fiber to a plurality of optical signals of different wavelengths; a plurality of movable mirrors, each of the mirrors being inclinable, and reflects each of the optical signal subjected to the spectral separation, from the wavelength dispersive element, and directs appropriately to the output optical fiber; a mirror-angle detector which detects an angle of inclination of each movable mirror; a first calculating unit which associates a first value which identifies the optical signals of the plurality of wavelengths, and a second value which identifies the input optical fiber or the output optical fiber, with the angle of inclination of each movable mirror; and a control circuit which performs a feed-back control of the movable mirror such that a value of the angle of inclination of the movable mirror, which is output from the first calculating unit, and an output from the mirror angle detector match.