Influence of mode competition on beam quality of fiber amplifier

doi:10.1088/1674-1056/23/10/104221

Abstract Theoretical and experimental studies of the influence of the mode competition on the output beam quality of fiber amplifiers are presented. Rate equations and modal decomposition method are used in the theoretical model. In the experiment, the output beam-quality factor of a fiber amplifier, which is based on a Yb-doped double-clad large mode area fiber as a function of the seed beam quality and the pump power of the amplifier, is measured. The experimental results are consistent with the theoretical analysis.

Keywords: fiber laser and amplifier mode competition beam quality

Received: 24 December 2013
Revised: 03 March 2014
Accepted manuscript online:

PACS:	42.55.-f	(Lasers)
	42.55.Wd	(Fiber lasers)
	42.81.-i	(Fiber optics)
	42.60.-v	(Laser optical systems: design and operation)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61307057), the State Key Laboratory of Tribology, Tsinghua University, China (Grant No. SKLT12B08), and the China Postdoctoral Science Foundation (Grant Nos. 2012M520258 and 2013T60109).

Corresponding Authors: Gong Ma-Li
E-mail: gongml@mail.tsinghua.edu.cn

About author: 42.55.-f; 42.55.Wd; 42.81.-i; 42.60.-v

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Xiao Qi-Rong (肖起榕), Yan Ping (闫平), Sun Jun-Yi (孙骏逸), Chen Xiao (陈霄), Ren Hai-Cui (任海翠), Gong Ma-Li (巩马理) Influence of mode competition on beam quality of fiber amplifier 2014 Chin. Phys. B 23 104221


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Influence of mode competition on beam quality of fiber amplifier

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