Numerical analysis of beam self-cleaning in multimode fiber amplifiers

被引：5

作者：

Jima, Mesay Addisu ^{[1
,2
]}

Tonello, Alessandro ^{[2
]}

Niang, Alioune ^{[3
,4
]}

Mansuryan, Tigran ^{[2
]}

Krupa, Katarzyna ^{[5
]}

Modotto, Daniele ^{[1
]}

Cucinotta, Annamaria ^{[6
]}

Couderc, Vincent ^{[2
]}

Wabnitz, Stefan ^{[3
,7
]}

机构：

[1] Univ Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy

[2] Univ Limoges, XLIM, UMR CNRS 7252, 123 Av A Thomas, F-87060 Limoges, France

[3] Sapienza Univ Roma, Dipartimento Ingn Informaz Elettron & Telecomunic, Via Eudossiana 18, I-00184 Rome, Italy

[4] Univ Maryland, Comp Sci & Elect Engn Dept, Baltimore, MD 21250 USA

[5] Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland

[6] Univ Parma, Dipartimento Ingn & Architettura, Parco Area Sci 181-A, I-43124 Parma, Italy

[7] CNR INO, Ist Nazl Ott, Via Campi Flegrei 34, I-80078 Pozzuoli, NA, Italy

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2022年 / 39卷 / 08期

基金：

欧盟地平线“2020”;

关键词：

PULSE-PROPAGATION; INTERFERENCE; DYNAMICS; IMPACT; LASERS;

D O I：

10.1364/JOSAB.463473

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Recent experimental results have reported the observation of beam self-cleaning or, more generally, nonlinear beam reshaping in active multimode fibers. In this work, we present a numerical analysis of these processes by considering the ideal case of a diode-pumped signal amplifier made of a graded-index multimode fiber with uniform Yb doping. Simulations confirmthat beam cleaning of the signal may take place even in amplifying fibers, in the absence of beam power conservation. Moreover, we show how the local signal intensity maxima, which are periodically generated by the self-imaging process, may influence the population inversion of the doping atoms, and locally saturate the amplifier gain. (C) 2022 Optica Publishing Group

引用

页码：2172 / 2180

页数：9

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