Long-term mode shape degradation in large mode area Yb-doped pulsed fiber amplifiers. (22nd November 2016)

• Record Type: Journal Article
• Authors: Bobkov, K K; Bubnov, M M; Aleshkina, S S; Likhachev, M E
• Is Part Of: Laser physics letters. Volume 14:Number 1(2017:Jan.)
• Publication Date: 2016-11-22
• Subjects: long-term mode degradation -- long-period grating -- photodarkening -- pulsed fiber lasers; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/14/1/015102
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: Experimental observation of long-term output mode shape degradation in pulsed Yb-doped fiber amplifiers is reported for the first time. The process occurs in large mode area Yb-doped fibers and is caused by the formation of the long period grating responsible for power transfer from the fundamental mode to the first high-order mode. The linkage between the process and photodarkening was revealed.