Integrated multistage taper coupler for waveguide to fiber coupling

摘要

A waveguide coupler has a compression region and an expansion region for coupling light between a silicon waveguide and an optical fiber. The compression region receives light from the silicon waveguide and compresses an optical mode of the light. Light is transmitted from the compression region to an expansion region. The expansion region expands the light to have a larger cross section. Light is then transmitted to the optical fiber.

主权项

1. A waveguide coupler for transmitting light between a silicon waveguide and an optical fiber, the coupler comprising:
a compression region, the compression region operable to: receive an optical beam from a semiconductor waveguide, compress the optical beam to have a smaller cross section compared to light confined in the semiconductor waveguide; and transmit optical beam to an expansion region; the expansion region, wherein: the expansion region comprises a first part; the first part overlaps, and is directly adjacent to, at least a portion of the compression region; and the expansion region is operable to: receive the optical beam from the compression region; expand the optical beam to have a larger cross section compared to light confined in the semiconductor waveguide; and transmit the optical beam to the optical fiber.