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. 02, 2025
Filed:
May. 20, 2023
Applicant:
Globalfoundries U.s. Inc., Malta, NY (US);
Inventor:
Yusheng Bian, Ballston Lake, NY (US);
Assignee:
GlobalFoundries U.S. Inc., Malta, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/12 (2006.01); G02B 6/122 (2006.01); G02B 6/13 (2006.01);
U.S. Cl.
CPC ...
G02B 6/1228 (2013.01); G02B 6/13 (2013.01); G02B 2006/12126 (2013.01);
Abstract
A photonic integrated circuit (PIC) includes a waveguide in or over a semiconductor substrate. The waveguide has a terminal end. The PIC also includes an optical absorber having a curved shape adjacent to opposing sides and an endwall of the terminal end of the waveguide, i.e., it surrounds the terminal end of the waveguide. The optical absorber is multi-layered and includes a light absorbing layer. The light absorbing layer may include germanium or a vanadate. The optical absorber terminates or attenuates any stray optical signals from the waveguide while maintaining low back reflection.