High-temperature wave thermalization spoils beam self-cleaning in nonlinear multimode GRIN fibers

被引：1
|
作者：
Mangini, Fabio [1 ]
Ferraro, Mario [1 ]
Tonello, Alessandro [2 ]
Couderc, Vincent [2 ]
Wabnitz, Stefan [1 ,3 ]
机构：
[1] Sapienza Univ Rome, Dept Informat Engn Elect & Telecommun, Via Eudossiana 18, I-00184 Rome, Italy
[2] Univ Limoges, XLIM, UMR CNRS 7252, 123 Ave A Thomas, F-87060 Limoges, France
[3] Ist Nazl Ottica, CNR INO, Via Campi Flegrei 34, I-80078 Pozzuoli, Italy
来源：
OPTICS LETTERS | 2023年 / 48卷 / 18期
关键词：
MODE;
D O I：
10.1364/OL.497917
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In our experiments, we reveal a so-far unnoticed power limitation of beam self-cleaning in graded-index nonlinear multimode optical fibers. As the optical pulse power is progressively increased, we observed that the initial Kerr-induced improvement of the spatial beam quality is eventually lost. Based on a holographic mode decomposition of the output field, we show that beam spoiling is associated with high-temperature wave thermalization, which depletes the fundamental mode in favor of a highly multimode power distribution. (c) 2023 Optica Publishing Group
引用
收藏
页码：4741 / 4744
页数：4
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