Aspects described herein include a mode multiplexer comprising a first optical waveguide
extending between a first port and a second port. A first input mode of an optical signal …

An integrated mode converter and multiplexer (/demultiplexer) combines a multimode
interference coupler, at least one phase-shifter and a symmetrical Y-junction. The dispersion …

Structures for an optical coupler and methods of fabricating a structure for an optical coupler.
A coupling section has a plurality of segments arranged with a pitch, a first wave guide core …