Patent ID: 9684222
Date: 2017-06-20
CPC Classifications: G02B,G02F

Claim:
1. An optical device based on an optical waveguide, comprising: a substrate; and a Mach-Zehnder Interferometer (MZI) positioned on the substrate, wherein the MZI includes: a clad layer positioned on the substrate; a core layer positioned between the substrate and the clad layer, and including a first arm waveguide positioned in a first region and a second arm waveguide positioned in a second region; and a wavelength adjusting unit positioned in the first region between the substrate and the clad layer, and configured to adjust a wavelength of an optical signal propagated through the first arm waveguide passing through the first region based on received electric energy, wherein the clad layer includes at least one of a material having a thermo-optic coefficient (TOC) with an opposite sign to that of a material included in the core layer, and a material having a smaller TOC than that of the material included in the core layer, wherein the core layer includes a silicon material having a positive TOC, and wherein the clad layer includes: a first clad layer positioned in the first region, and including a material having a smaller TOC than that of the silicon material included in the core layer; and a second clad layer positioned in the second region and including a material having a negative TOC.