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:
Jun. 28, 2022
Filed:
Sep. 30, 2020
Applicant:
Nokia Solutions and Networks Oy, Espoo, FI;
Inventors:
Stefano Grillanda, Springfield, NJ (US);
Ting-Chen Hu, Westfield, NJ (US);
Assignee:
Nokia Solutions and Networks Oy, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/12 (2006.01);
U.S. Cl.
CPC ...
G02B 6/12026 (2013.01); G02B 6/12016 (2013.01); G02B 6/12028 (2013.01); G02B 2006/1204 (2013.01); G02B 2006/12061 (2013.01);
Abstract
Photonic integrated circuits utilizing interferometric effects, such as wavelength multiplexers/demultiplexers, include a free-space coupling region having two core layers that have thermo-optic coefficients of opposite sign. The two core layers are configured to provide athermal or nearly-athermal operation. Described examples include integrated array waveguide grating devices and integrated echelle grating devices. Example material systems include LNOI and SOI.