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:
Aug. 22, 2023
Filed:
Mar. 15, 2018
Applicant:
Gc Photonics Inc., Nepean, CA;
Inventor:
Lijie Qiao, Nepean, CA;
Assignee:
GC Photonics, Inc., Ottawa, CA;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/035 (2006.01); G02F 1/225 (2006.01); G02F 1/21 (2006.01); G02B 6/293 (2006.01);
U.S. Cl.
CPC ...
G02F 1/225 (2013.01); G02B 6/29355 (2013.01); G02F 1/212 (2021.01); G02F 2203/055 (2013.01);
Abstract
A tunable optical filter includes sequentially coupled Mach-Zehnder (MZ) interferometers. The first and last interferometers are configured to function as variable power splitter/combiner, whereas the middle interferometer or interferometers have unequal optical paths, creating a desired spectral response of the entire filter. The amplitude of the spectral response can be varied by varying the optical power splitting/combining ratios.