Patent ID: 7356227
Filing Date: 2008-04-08
Classification: G02B,G02F

Abstract:
1. An optical switch comprising: a substrate including a material of one of KTaO a Y branching waveguide including a first input optical guide having an input end for receiving a transmitted optical signal, and a second and third output optical waveguides that branch from the first input optical waveguide, wherein the first input optical waveguide, the second output optical waveguide, and the third output optical waveguide are formed on the substrate, and wherein the first input optical waveguide, the second output optical waveguide, and the third output optical waveguide are respectively a three-dimensional optical waveguide having a core waveguide placed on said substrate and including a material of one of K an electrode for applying electric fields to the core waveguide, the electrode being formed at least one of below a lower clad layer and above an upper clad layer in said three-dimensional waveguide, the electrode being formed on the second output optical waveguide and the third output optical waveguide.