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:
Apr. 29, 2014
Filed:
Apr. 09, 2010
Chang Liu, Shanghai, CN;
Jason N. Farmer, Vancouver, WA (US);
Anmol Nijjar, Fremont, CA (US);
Xiaojun LI, Shanghai, CN;
Chang Liu, Shanghai, CN;
Jason N. Farmer, Vancouver, WA (US);
Anmol Nijjar, Fremont, CA (US);
Xiaojun Li, Shanghai, CN;
nLight Photonics Corporation, Vancouver, WA (US);
Abstract
A stable, single mode fiber amplifier is described. The amplifier consists of a seed source, a passive single clad multimode fiber, an active double clad multimode fiber or a multimode fiber horn and a semiconductor laser pump source. The passive fiber is packaged on a mandrel with a compound radius of curvature such that high order modes in the fiber are stripped from the core leaving only the fundamental mode. This fiber is then spliced to a multimode active fiber of similar core diameter. By exciting only the fundamental mode of this active fiber, stable single mode amplification is achieved.