BACKGROUND The present disclosure herein relates to methods of form ing photo
detectors and, more particularly, to methods of forming photo detectors using a selective …

An optical waveguide splitter with a symmetric splitting power ratio having one input port and
two output ports, includes a Substrate and one or more vertical waveguide lay ers deposited …

An optical element has a substrate; and first to third optical waveguides formed on the
substrate and each having a lower clad layer, a core layer, and an upper clad layer, the core …

An integrated optical semiconductor device includes a substrate including first and second
regions; a plurality of light receiving devices disposed in the second region; a multimode …

An optical semiconductor device comprises a semiconductor substrate, an optical 90-degree
hybrid circuit provided on the substrate, a plurality of input optical waveguides provided on …