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:
Mar. 27, 2012
Filed:
Jun. 21, 2011
Kenji Sato, Tokyo, JP;
Jan DE Merli, Tokyo, JP;
Kenji Mizutani, Tokyo, JP;
Koji Kudo, Tokyo, JP;
Shinya Sudo, Tokyo, JP;
Mads L. Nielsen, Tokyo, JP;
Kenji Sato, Tokyo, JP;
Jan De Merli, Tokyo, JP;
Kenji Mizutani, Tokyo, JP;
Koji Kudo, Tokyo, JP;
Shinya Sudo, Tokyo, JP;
Mads L. Nielsen, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In an external cavity wavelength tunable laser device including an external cavity () which includes a semiconductor optical amplifier () and performs laser oscillation operation by feeding back external light, a wavelength tunable mirror () having at least a single peak reflection spectrum characteristic within a laser wavelength tuning range is placed on one end of the external cavity (), and a Fabry Perot mode interval determined by the effective length of the external cavity () is not less than 1/10 times and not more than 10 times the reflection band full width half maximum of the wavelength tunable mirror ().