Mechanism of brightness enhancement in multimode LD-pumped graded-index fiber Raman lasers: numerical modeling

被引：14

作者：

Sidelnikov, Oleg S. ^{[1
]}

Podivilov, Evgeny, V ^{[1
,2
]}

Fedoruk, Mikhail P. ^{[1
]}

Kuznetsov, Alexey G. ^{[2
]}

Wabnitz, Stefan ^{[1
,3
]}

Babin, Sergey A. ^{[1
,2
]}

机构：

[1] Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia

[2] SB RAS, Inst Automat & Electrometry, 1 Ac Koptyug Ave, Novosibirsk 630090, Russia

[3] Sapienza Univ Rome, DIET, Via Eudossiana 18, I-00184 Rome, Italy

来源：

OPTICS EXPRESS | 2022年 / 30卷 / 05期

基金：

俄罗斯科学基金会; 俄罗斯基础研究基金会; 欧洲研究理事会;

关键词：

Compendex;

D O I：

10.1364/OE.449773

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We develop a comprehensive theory for describing the experimental beam profiles from multimode fiber Raman lasers. We take into account the presence of random linear mode coupling, Kerr beam self-cleaning and intra-cavity spatial filtering. All of these factors play a decisive role in shaping the Stokes beam, which has a predominant fundamental mode content. Although the highly multimode pump beam is strongly depleted, it remains almost insensitive to the different physical effects. As a result, the intensity of the output Stokes beam is an order of magnitude higher than the pump intensity at its maximum, in quantitative agreement with the experimental results and in contrast with the simplified balance model. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

引用

页码：8212 / 8221

页数：10

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