Patent ID: 9020312
Filing Date: 2015-04-28
Classification: G02B,G02F,Y10T

Abstract:
1. A connecting channel located between an optical waveguide and an optical device to connect the optical waveguide and the optical device, comprising: a first silicon layer that has a rib-shaped part extending in a longitudinal direction of the connecting channel; and a second silicon layer that is stacked on the first silicon layer to partially overlap the rib-shaped part, and extends in the longitudinal direction, the second silicon layer having a tapered part tapered toward one end in the longitudinal direction, and being located away from an upper portion of the rib-shaped part at an end surface of one end in the longitudinal direction, wherein the rib-shaped part of the first silicon layer includes an S-shaped part, and the S-shaped part intersects a side face of the tapered part of the second silicon layer, wherein the tapered part of the second silicon layer has a curved shape bent in the same direction as that of a bent part of the other end side, from among two bent parts of the S-shaped part of the first silicon layer, and the tapered part of the second silicon layer has a curvature larger than that of the bent part of the other end side of the first silicon layer.