Offset optical coupler configurations for high density fiber coupling

Abstract

A photonic device includes a photonic integrated circuit (PIC) comprising a plurality of waveguides, an optical coupler array positioned near an edge of the PIC, and a plurality of optical fibers. The optical coupler array comprises a plurality of optical couplers. Each optical coupler of the optical coupler array defines an optical path coupling a respective waveguide of the plurality of waveguides to a respective optical fiber of the plurality of optical fibers. At least two optical couplers of the plurality of optical couplers are offset relative to each other, either in a first direction perpendicular to the waveguide plane or a second direction perpendicular to the edge of the PIC, or both.

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