Park, Vaughan, Fleming & Dowler LLP
Optical modulator with three-dimensional waveguide tapers
An integrated circuit that includes an optical waveguide defined in a semiconductor layer is described. In this integrated circuit, light is coupled between the optical waveguide and an optical modulator, which is disposed on the optical waveguide, using 3-dimensional (3-D) taper structures that are proximate to the ends of the optical modulator. The cross-sectional areas of these 3-D taper structures transition, over a distance, from that of the optical waveguide (distal from the optical modulator) to that of optical modulator (proximate to the ends of the optical modulator). In this way, a spatial extent of an optical mode in the optical waveguide and a spatial extent of the optical mode in the optical modulator may be approximately matched to reduce the optical loss when the light is coupled to or from the optical modulator.
Oracle America, Inc.
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G02B G02F G02F
inventional additional inventional
Xuezhe Dazeng John E. Mehdi Ashok V.
Zheng Feng Cunningham Asghari Krishnamoorthy