Mode instabilities: physical origin and mitigation strategies

Cesar Jauregui; Hans-Jürgen Otto; Florian Jansen; Fabian Stutzki; Tino Eidam; Jens Limpert; Andreas Tünnermann

doi:10.1117/12.2004381

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22 March 2013 Mode instabilities: physical origin and mitigation strategies

Cesar Jauregui, Hans-Jürgen Otto, Florian Jansen, Fabian Stutzki, Tino Eidam, Jens Limpert, Andreas Tünnermann

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Proceedings Volume 8601, Fiber Lasers X: Technology, Systems, and Applications; 86010F (2013) https://doi.org/10.1117/12.2004381
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

The phenomenon of mode instabilities has quickly become the most limiting effect for a further scaling of the average power of fiber laser systems. It is important to get a detailed understanding of its physical origin in order to develop efficient mitigation strategies. In this work we present an analysis of the different physical processes that give rise to mode instabilities and reveal that thermally-induced non-adiabatic waveguide changes play a key role. With this insight in the physical processes underlying mode instabilities a semi-analytic formula is obtained and several mitigation guidelines will be presented and discussed.

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Cesar Jauregui, Hans-Jürgen Otto, Florian Jansen, Fabian Stutzki, Tino Eidam, Jens Limpert, and Andreas Tünnermann "Mode instabilities: physical origin and mitigation strategies", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86010F (22 March 2013); https://doi.org/10.1117/12.2004381

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