Mainz 2026 – scientific programme

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MO: Fachverband Molekülphysik

MO 4: Novel Experimental Approaches and Novel Theoretical and Computational Approaches

MO 4.6: Talk

Monday, March 2, 2026, 18:30–18:45, P 105

Generation of broad-bandwidth deep ultraviolet pulses using achromatic second harmonic generation — •Nils-Oliver Schütz, Mario Niebuhr, Ulrich Bangert, Felix Selz, Felix Riedel, and Lukas Bruder — Hermann-Herder-Straße 3, 79104 Freiburg, Germany

The generation of deep ultraviolet optical pulses featuring broad spectral bandwidth and short pulse durations is a challenging task, especially when using high repetition rate (> 100kHz) laser systems that provide low pulse energies to drive the nonlinear conversion processes. We present a scheme based on second harmonic generation of the output of a non-collinear optical parametric amplifier. To increase the bandwidth and efficiency of the second harmonic generation we employ achromatic phase matching [1]. Through ray-tracing simulations, the impact of different geometrical arrangements of the setup on the compression of the UV pulses was investigated. The results, together with the characterization of the UV pulses, are presented.

Keywords: Second harmonic generation; Pulse compression; deep UV pulses; achromatic phase matching