GRATING-COUPLER ASSEMBLY WITH SMALL MODE-FIELD DIAMETER FOR PHOTONIC-INTEGRATED-CIRCUIT SYSTEMS

摘要

A grating-coupler assembly with a small mode-field diameter for photonic-integrated-circuit systems is disclosed. The assembly includes a silicon waveguide supported by a silicon-on-insulator substrate, and a grating coupler supported by the substrate and optically coupled to the silicon waveguide. The assembly has an optical fiber with a mode-field diameter in the range from 5 μm to 6 μm. One end of the optical fiber is disposed adjacent the grating coupler to define a coupling efficiency of 0.7 or greater.

主权项

1. A grating-coupler assembly for optically coupling light into or out of a photonic integrated circuit (PIC), comprising:
a silicon-on-insulator (SOI) substrate; at least one silicon waveguide supported by the SOI substrate; at least one grating coupler supported by the SOI substrate and optically coupled to the at least one silicon waveguide; an optical fiber having an end and at least one core having a mode-field diameter MFD60 in the range 5 μm≦MFD60≦6 μm, wherein the optical-fiber end is disposed adjacent the at least one grating coupler; and wherein the at least one core of the optical fiber and the at least one grating coupler define a coupling efficiency CE≧0.7.