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:
Nov. 28, 2017
Filed:
Sep. 22, 2016
Applicant:
Dicon Fiberoptics, Inc., Richmond, CA (US);
Inventors:
Alexander Jacob Birman, Oakland, CA (US);
Ho-Shang Lee, El Sobrante, CA (US);
Assignee:
DICON FIBEROPTICS, INC., Richmond, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/293 (2006.01);
U.S. Cl.
CPC ...
G02B 6/29389 (2013.01); G02B 6/29311 (2013.01); G02B 6/29313 (2013.01); G02B 6/29395 (2013.01);
Abstract
A tunable optical filter is described, utilizing a diffraction grating and a rotating mirror. By incorporating a phase screen, or the combination of a phase screen and a transmission amplitude-modulated mask, located in front of the rotating mirror, or possibly at other locations in the optical path, the selected wavelength's passband spectrum can be shaped in a variety of ways. In particular, the output spectrum of the tunable optical filter can be made flatter within the passband, while maintaining good isolation of adjacent channels or wavelengths.