Dynamics and Origin of Mode Instabilities in High Power Fiber Laser Amplifiers

被引：0
|
作者：
Otto, Hans-Juergen [1 ]
Jauregui, Cesar [1 ]
Eidam, Tino [1 ]
Stutzki, Fabian [1 ]
Jansen, Florian [1 ]
Limpert, Jens [1 ]
Tuennermann, Andreas [1 ]
机构：
[1] Univ Jena, Inst Appl Phys, D-07745 Jena, Germany
来源：
2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) | 2012年
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中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Mode instabilities occurring in fiber laser systems during high power operation are currently the most limiting effect for average power scaling. We experimentally and theoretically investigate this effect. A high-resolution high-speed camera has been used to temporally resolve the dynamics of mode-instabilities. We show that periodic fluctuations of the beam are observable right above the mode instability threshold. Additionally, the temporal fluctuations become slower with larger mode-field diameters. These results support the thesis of a thermally induced long-period grating as the origin of mode-instabilities.
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页数：2
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