Theoretical analysis of the SRS-induced mode distortion in large-mode area fiber amplifiers

被引：36

作者：

Liu, Wei ^{[1
]}

Ma, Pengfei ^{[1
,2
]}

Shi, Chen ^{[1
,2
]}

Zhou, Pu ^{[1
,2
]}

Jiang, Zongfu ^{[1
,2
]}

机构：

[1] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Hunan, Peoples R China

[2] Natl Univ Def Technol, Hunan Prov Collaborat Innovat Ctr High Power Fibe, Changsha 410073, Hunan, Peoples R China

来源：

OPTICS EXPRESS | 2018年 / 26卷 / 12期

基金：

中国国家自然科学基金;

关键词：

STIMULATED-RAMAN-SCATTERING; PHOTONIC CRYSTAL FIBER; OPTICAL-FIBERS; OUTPUT POWER; BEAM QUALITY; LASERS; INSTABILITY; THRESHOLD; ORIGIN; IMPACT;

D O I：

10.1364/OE.26.015793

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, the spectral evolution properties of different transverse modes with the stimulated Raman scattering (SRS) effect are analyzed in large-mode-area (LMA) fiber amplifiers for the first time. Both the ratios of laser power in Raman Stokes light and high order modes (HOMs) can be calculated through the comprehensive analysis of transverse mode competition and nonlinear transverse mode coupling processes. The theoretical study reveals that SRS-induced inter-modal wave mixing (IM-WM) effect would transfer power from signal light in LP01 mode to Raman Stokes light in LP11 mode and lead to the onset of the mode distortion phenomenon in high-power LMA fiber amplifiers. Different from the traditional thermal-induced mode instability (MI) phenomenon, the SRS-induced mode distortion could occur by just with the contribution of quantum noise. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：15793 / 15803

页数：11

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