Patent ID: 7123784
Filing Date: 2006-10-17
Classification: G02F

Abstract:
1. An electro-optic modulator comprising: a substrate made of a material which has an electro-optic effect; an optical waveguide which comprises at least a pair of optical paths and is formed in the substrate; a buffer layer which includes transparent and is formed on the substrate and on the optical waveguide, wherein the buffer layer is a mutual diffusion layer made from laminated films which comprise at least one transparent insulator film and at least one transparent conductor film, wherein the laminated films are mutually partially diffused into each other, and wherein the buffer layer has a structure in which there is no clear boundary between the at least one transparent insulator film and the at least one transparent conductor film; and electrodes which are formed on the buffer layer and are arranged to cause refractive index changes in the pair of optical paths in response to electrical fields surrounding the electro-optic modulator.