Patent ID: 8515225
Filing Date: 2013-08-20
Classification: B29D,G02B,G02F

Abstract:
1. An optical device, comprising an optical waveguide having a resonance structure, wherein: a first section that constitutes at least part of the optical waveguide includes a core layer connected to a core layer of a second section of the optical waveguide, which joins with the first section along a light traveling direction; and a first optical material that forms at least part of the core layer of the first section, and a second optical material that forms at least part of the core layer of the second section have thermo-optic effects with their signs different from each other; wherein the first section comprises a refractive index control section operable to control a refractive index at a guided wavelength according to an electric control signal; wherein the refractive index control section comprises, as the first optical material, one of an electro optic material including lead zirconate titanate and a material including lanthanum-doped lead zirconate titanate; and wherein the first section and the second section are parts of a ring-shaped optical waveguide.