Patent ID: 9354394
Filing Date: 2016-05-31
CPC Classification: G02B

Claim Text:
1. An optical device, comprising: a substrate; a buried-oxide layer disposed on the substrate; and a semiconductor layer disposed on the buried-oxide layer, wherein the semiconductor layer includes a ring resonator, an optical waveguide and a grating coupler, wherein the optical waveguide comprises straight routing segments and bends to couple the straight routing segments, wherein the routing segments have a wider width than the bends to reduce optical loss on the routing segments and enable tight bending on the bends, wherein the semiconductor layer has a thickness and the etch depth is more than 50% but less than 100% of the thickness to leave a remaining silicon slab for active devices, and wherein the ring resonator, the optical waveguide and the grating coupler are defined in the semiconductor layer using a common etch depth.