Fiber core mode leakage induced by refractive index variation in high-power fiber laser

doi:10.1088/1674-1056/26/3/034205

Abstract This paper presents an investigation of specific optical fiber core mode leakage behavior that occurs in high-power double-clad fiber lasers as a result of thermally-induced refractive index variations. A model of the power transfer between the core modes and the cladding modes during thermally-induced refractive index variations is established based on the mode coupling theory. The results of numerical simulations based on actual laser parameters are presented. Experimental measurements were also carried out, the results showed good agreement with the corresponding simulation results.

Keywords: double-clad fiber laser and amplifier core loss cladding mode mode coupling theory

Received: 19 September 2016
Revised: 17 November 2016
Accepted manuscript online:

PACS:	42.55.Wd	(Fiber lasers)
	42.60.Da	(Resonators, cavities, amplifiers, arrays, and rings)
	42.55.Xi	(Diode-pumped lasers)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61307057 and 61675114).

Corresponding Authors: Dan Li
E-mail: dli@mail.tsinghua.edu.cn

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Ping Yan(闫平), Xuejiao Wang(王雪娇), Yusheng Huang(黄昱升), Chen Fu(付晨), Junyi Sun(孙骏逸), Qirong Xiao(肖起榕), Dan Li(李丹), Mali Gong(巩马理) Fiber core mode leakage induced by refractive index variation in high-power fiber laser 2017 Chin. Phys. B 26 034205

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Fiber core mode leakage induced by refractive index variation in high-power fiber laser

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