INTEGRATED OPTICAL CHIP WITH DECREASED SURFACE WAVE PROPAGATION

摘要

PURPOSE: An integrated optical chip is provided to improve polarized light extinction ratios and reduce the polarized light non-reciprocity error of a multi-role integrated optical chip by propagating a surface wave. CONSTITUTION: An optical waveguide network is formed in an integrated optical chip(58) containing a substrate(16) consisting of an electrooptic active material, and the optical waveguide network has an input facet(46) through which an optical signal is inputted in the optical waveguide network and an output facet(48) through which the optical signal is output from the optical waveguide network. A structure(60) is disposed in an upper surface part(44) of the substrate so as to prevent the surface wave propagating in the substrate from cross coupling in the output facet.