A novel method of evaluating large mode area fiber design by brightness factor

doi:10.1088/1674-1056/24/2/024207

Abstract A novel evaluation term and a more reasonable criterion, which is described by a new parameter of brightness factor for active large mode area fiber design, are presented. The brightness factor evaluation method is based on the transverse mode competition mechanism in fiber lasers and amplifiers. The brightness factor can be seen as a description of fiber general property since it can represent the output laser brightness of the fiber laser system and because of its ability to resist the nonlinear effect. A core-doped active large pitch fiber with a core diameter of 190 μ and a mode-field diameter of 180 μm is designed by this method, and the designed fiber allows effective single-mode operation.

Keywords: brightness factor large pitch fiber mode competition

Received: 03 July 2014
Revised: 16 August 2014
Accepted manuscript online:

PACS:	42.55.-f	(Lasers)
	42.55.Wd	(Fiber lasers)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61475081).

Corresponding Authors: Zhang Hai-Tao, Gong Ma-Li
E-mail: zhanghaitao@mail.tsinghua.edu.cn;gongml@mail.tsinghua.edu.cn

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Zhang Hai-Tao (张海涛), Chen Dan (陈丹), Ren Hai-Cui (任海翠), Yan Ping (闫平), Gong Ma-Li (巩马理) A novel method of evaluating large mode area fiber design by brightness factor 2015 Chin. Phys. B 24 024207

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