飞秒
多模光纤
放大器
材料科学
激光束质量
光学
梁(结构)
脉搏(音乐)
光纤激光器
光电子学
光纤
激光器
物理
激光束
探测器
CMOS芯片
作者
Henry Haig,Nicholas Bender,Yi-Hao Chen,Anirban Dhar,NILOTPAL CHOUDHURY,Ranjan Sen,Demetrios N. Christodoulides,Frank W. Wise
出处
期刊:Journal of The Optical Society of America B-optical Physics
[The Optical Society]
日期:2023-05-19
卷期号:40 (6): 1510-1510
被引量:1
摘要
Kerr beam cleaning is a nonlinear phenomenon in graded-index multimode fiber where power flows toward the fundamental mode, generating bell-shaped output beams. Here we study beam cleaning of femtosecond pulses accompanied by gain in a multimode fiber amplifier. Mode-resolved energy measurements and numerical simulations showed that the amplifier generates beams with high fundamental mode content (greater than 30% of the overall pulse energy) for a wide range of amplification levels. Control experiments using stretched pulses that evolve without strong Kerr nonlinear effects showed a degrading beam profile, in contrast to nonlinear beam cleaning. Temporal measurements showed that seed pulse parameters have a strong effect on the amplified pulse quality. These results may influence the design of future high-performance fiber lasers and amplifiers.
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