INTEGRATED OPTICAL CHIP WITH DECREASED SURFACE WAVE PROPAGATION

摘要

PROBLEM TO BE SOLVED: To improve polarized light extinction ratios and reduce the polarized light non-reciprocity error of a multirole integrated optical chip by propagating a surface wave. SOLUTION: An optical waveguide network is formed in the 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 can be inputted in the optical waveguide network and an output facet 48 through which the optical signal can be outputted from the optical waveguide network. A structure 60 is disposed in the upper surface part 44 of the substrate 16 so as to prevent the surface wave propagating in the substrate 16 from cross coupling in the output facet 48.