Patent ID: 6754408
Filing Date: 2004-06-22
Classification: G02B,G02F,Y10S

Abstract:
An optical switch for making part of incident light, which contains a specific polarized light component and has been made incident on an optical waveguide, selectively emergent from said optical waveguide to a light emergence portion provided outside said optical waveguide, said optical switch comprising:a multi-layer structure composed of a plurality of light transmissive layers disposed between said light emergence portion and said optical waveguide; wherein letting &sgr; be a refractive index control accuracy at the time of producing said multi-layer structure, a refractive index of at least one light transmissive layer in said multi-layer structure is different from a refractive index of a light transmissive layer other than said at least one light transmissive layer in said multi-layer structure by 3&sgr; or more.