Affiliation:
1. Università di Brescia
2. Université de Limoges, XLIM
3. Sapienza Università di Roma
4. University of Maryland
5. Institute of Physical Chemistry Polish Academy of Sciences
6. Università di Parma
7. CNR-INO
Abstract
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 confirm that 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.
Funder
ArianeGroup
H2020 European Research Council
Narodowa Agencja Wymiany Akademickiej
Campus France
Subject
Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics
Cited by
4 articles.
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