Columbia University

You-Chia Chang

Michal Lipson

Brian Stern

Samantha P Roberts

Christopher Thomas Phare

Aseema Mohanty

Steven A Miller

Mohammad Amin Tadayon

Oscar Adrian Jimenez Gordillo

Moshe Zadka

Utsav D Dave

Christoper Thomas Phare

An optical apparatus comprising an optical switch array comprising a plurality of optical switches configured to selectively route light through one or more of a plurality of waveguides, a plurality of emitters, wherein at least one emitter of the plurality of emitters is disposed in communication with the one or more of the plurality of waveguides and configured to receive light and cause at least a portion of the light to exit the waveguide, and a lens disposed to receive light exiting the one or more of a plurality of waveguides via the at least one emitter, wherein the lens is configured to direct the received light as an optical output, and wherein the position of the at least one emitter relative to the lens facilitates beam steering of the optical output.

Beam steering and receiving method based on an optical switch array

A millimeter scale weak grating coupler comprising a silicon waveguide having bars of overlay material of length (a) disposed periodically at a period (&#x2227;) adjacent the silicon waveguide whereby a uniform grating output is achieved.

Millimeter scale long grating coupler

Light recycling within a waveguide is achieved by mode conversion instead of resonance. A structure is provided in in which light makes multiple passes through the same waveguide by converting the mode to a different mode after each pass and rerouting the light back into the same waveguide. The structure includes a bus waveguide and at least one mode converter device disposed at or adjacent each of two opposing ends of the bus waveguide, wherein each mode converter devices is configured to receive light having a receiving mode along a first direction and to cause light having a different mode from the receiving mode to propagate in a second direction opposite the first direction.

Resonance-free light recycling in waveguides

An optical coupling apparatus comprising a substrate having a trench formed therein, the trench having a width measured between two opposing walls that define a portion of the trench; and a waveguide disposed on or in the substrate, the waveguide having a width that tapers along an axis of light propagation.

Fiber-to-waveguide coupling with high alignment tolerance

Growing community of inventors

New York, NY, United States of America

You-Chia Chang