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:
Dec. 28, 2021
Filed:
Sep. 09, 2020
Chong Zhang, Santa Barbara, CA (US);
Hyun Dai Park, Goleta, CA (US);
Minh Tran, Goleta, CA (US);
Tin Komljenovic, Santa Barbara, CA (US);
Chong Zhang, Santa Barbara, CA (US);
Hyun Dai Park, Goleta, CA (US);
Minh Tran, Goleta, CA (US);
Tin Komljenovic, Santa Barbara, CA (US);
Nexus Photonics LLC, Santa Barbara, CA (US);
Abstract
A device comprises first, second and third elements fabricated on a common substrate. The first element comprises an active waveguide structure comprising: one portion, of effective cross-sectional area A, supporting a first optical mode; and a second portion, butt-coupled to the first portion, of effective cross-sectional area A>A. The second element comprises a passive waveguide structure supporting a second optical mode. The third element, at least partly butt-coupled to the second portion, comprises an intermediate waveguide structure supporting intermediate optical modes. If the first optical mode differs from the second optical mode by more than a predetermined amount, a tapered waveguide structure in at least one of the second and third elements facilitates efficient adiabatic transformation between the first optical mode and one intermediate optical mode. No adiabatic transformation occurs between any intermediate optical mode and the first optical mode. Mutual alignments of the elements are defined using lithographic marks.