An optical circuit capable of operating as a 90 optical hybrid includes a phase-symmetric
optical splitter and a 90 optical splitter, and two 2x2 optical couplers as optical combiners …

A monolithically integrated silicon coherent receiver based on a novel scheme with a
crossing-free 900 hybrid optical coupler and two balanced germanium photodetectors is …

An optical circuit capable of operating as a 90 optical hybrid includes a phase-symmetric
optical splitter and a 90 optical splitter, and two 2x2 optical couplers as optical combiners …

Aspects of a symmetric coherent optical mixer are described. In one example, the coherent
optical mixer includes a group of symmetric MMI couplers and a group of symmetric bend …

Ultra-compact 56-Gb/s QPSK and 80-Gb/s 16-QAM silicon coherent receiver free of waveguide
crossings Page 1 Ultra-Compact 56-Gb/s QPSK and 80-Gb/s 16-QAM Silicon Coherent …

An optical circuit device includes a first to fourth optical couplers, wherein the first optical
coupler splits a first input light into a first output beam and a second output beam with a 90 …

An optical semiconductor device includes a first optical coupler including a first input port
and a second input port, a first optical branching device including a first output port and a …

An optical device that can be used as an optical hybrid, eg, in CMOS-compatible PICs. In an
example embodiment, the optical device has a single optical input and four optical outputs …

Structures for a waveguide bend and methods of fabricating a structure for a waveguide
bend. A first waveguide core has a first section, a second section, and a first waveguide …

An optical circuit for routing a signal includes a coupler and first and second waveguides.
The coupler has an input for the signal and has first and second outputs. The first waveguide …