The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 2021
Filed:
May. 23, 2019
International Business Machines Corporation, Armonk, NY (US);
Tymon Barwicz, Yorktown Heights, NY (US);
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Abstract
Systems and methods for coupling optical fiber to a photonic chip are described. The apparatus may include a low index contrast waveguide overlapping a region of a photonic chip, a high index contrast waveguide at least partially embedded within the overlapped region of the photonic chip, where the high index contrast waveguide comprises a tapered region and a fixed-width routing region, and where the tapered region comprises an adiabatic crossing region and a wide waveguide region connecting the adiabatic crossing region and the fixed-width routing region. A rate of increase of the width of the high index contrast waveguide with respect to position along the length of the high index contrast waveguide is substantially non-linear within the adiabatic crossing region and substantially asymmetric about a minimum slope point.