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DY: Fachverband Dynamik und Statistische Physik

DY 4: Poster Session II: Nonlinear Dynamics, Simulations and Machine Learning

DY 4.6: Poster

Dienstag, 28. September 2021, 17:30–19:30, P

Nonlinear dynamics in intra-cavity pumped thin-disk lasers — •Sarah Trinschek, Christian Vorholt, and Ulrich Wittrock — Münster University of Applied Sciences, Germany

For an intra-cavity pumped Yb:YAG thin-disk laser, complex dynamics of the laser output power can be observed. The gain medium of this laser is residing in the resonator of a conventional, diode-pumped Yb:YAG thin-disk laser. We present illustrative experimental results and a detailed analysis of the nonlinear dynamics of the laser in the framework of a rate-equation model. Despite stable continuous-wave pumping, periodic pulse trains and chaotic fluctuations of the optical power of both lasers occur. The dynamics is not driven by external perturbations but arises naturally in this laser system due to cross-saturation effects of the two gain media. The qualitative type of dynamics can be controlled by the resonator length of the diode-pumped laser but the detailed behaviour of the laser is complex and also shows hysteresis and multistability.