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Q: Fachverband Quantenoptik und Photonik
Q 26: Poster – Ultrashort Pulses and Strong Fields (joint session K/Q)
Q 26.3: Poster
Dienstag, 3. März 2026, 17:00–19:00, Philo 1. OG
Spatiotemporal analysis of non-collinear optical parametric oscillators — •Robin Mevert1,2, Fridolin Jakob Geesmann1, Oliver Melchert1,2, Han Rao1,2, Arun Paudel1,2, and Uwe Morgner1,2,3 — 1Leibniz University Hannover, Institute of Quantum Optics, Hannover, Germany — 2Cluster of Excellence PhoenixD, Hannover, Germany — 3Laser Zentrum Hannover e.V., Hannover, Germany
Femtosecond non-collinear optical parametric oscillators exhibit complex spatiotemporal dynamics, making it challenging to predict their steady-state under different input conditions. This study applies a GPU-accelerated 2D+1-dimensional split-step Fourier method to solve a generalized model of the coupled wave equations. It considers all potential second-order nonlinear mixing processes, including phase matching, diffraction, and walk-off, for all interacting pulses. Additionally, the model includes the impact of third-order nonlinear effects, such as self-phase modulation (SPM) and cross-phase modulation (XPM), on the resulting cavity mode. The cavity roundtrip is modelled using the Collins diffraction integral, with additional losses, dispersion, and spatial filtering due to the limited size of the mirrors.
Keywords: optical parametric oscillator; non-collinear; simulation; GPU-accelerated; spatiotemporal dynamics