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:
Feb. 10, 2009
Filed:
Apr. 18, 2006
Changho Chong, Kasugai, JP;
Atsushi Morosawa, Kasugai, JP;
Tooru Sakai, Inuyama, JP;
Santec Corporation, Komaki, JP;
Abstract
An optical fiber loop has a gain medium having a gain at an oscillation wavelength and optical circulatorsand. Collimate lensesandenlarge light bean taken from the optical circulatorsand. A polygon mirroris provided on the light axis, and is rotated. A diffraction gratingis provided at the receiving position of the light reflected by the polygon mirror, and is of a Littrow configuration which reflects the light in the same direction as the incident light. A selected wavelength changes according to an incident angle to the diffraction grating, resulting in increase of selectivity owing to twice incident, thereby permitting to change an oscillation wavelength with narrow band even when changing the selected wavelength by rotating the polygon mirrorat high speed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile