Patent ID: 7362434
Filing Date: 2008-04-22
Classification: G01J,G02B

Abstract:
1. An optical switch comprising: an optical fiber for output; an optical fiber for input; a plurality of collimating lenses which are disposed corresponding to the optical fiber for output and the optical fiber for input respectively; a spectroscope which separates spatially light from the collimating lens according to a wavelength; a image forming lens which forms an image of light from the spectroscope; a mirror array which includes a plurality of mirrors which reflect light formed as an image by the image forming lens, and an angle of each mirror can be controlled independently by an electric signal; an optical branching device which is connected to the optical fiber for output and extracts a part of output light from the optical fiber for output; an optical fiber for monitoring which guides the part of the output light extracted by the optical branching device; a collimating lens for monitoring which is disposed corresponding to the optical fiber for monitoring; and a photodetector array which can detect each of lights of different wavelengths from the collimating lens for monitoring, which are separated at the spectroscope and which are imaged by the image forming lens, the collimating lens for monitoring being disposed in an optical path between the optical fiber for monitoring and the photodetector array.