Patent ID: 8068704
Filing Date: 2011-11-29
Classification: G02B

Abstract:
1. An optical waveguide circuit comprising: a lower cladding layer formed on a substrate; a first optical waveguide formed on the lower cladding layer so as to partition the lower cladding layer into a first portion and a second portion; a second optical waveguide formed on the first portion, the second optical waveguide including a tip end portion formed in a tapered shape; and a third optical waveguide formed on the second portion, the third optical waveguide including a tip end portion opposed to the tip end portion of the second optical waveguide via the first optical waveguide, a tip end portion of the third optical waveguide being formed in a tapered shape, wherein the first optical waveguide is disposed between the second optical waveguide and the third optical waveguide with a gap interposed between the first optical waveguide and the respective second and third optical waveguides, and wherein the tip end portion of the second optical waveguide is opposed to a first side face of the first optical waveguide, and the tip end portion of the third optical waveguide is opposed to a second side face of the first optical waveguide opposite to the first side face.