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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 2: Poster
K 2.9: Poster
Tuesday, March 15, 2022, 16:30–18:30, P
Towards rapidly-tunable, femtosecond UV laser pulses — •Fridolin Geesmann1,2, Robin Mevert1,2, Yuliya Binhammer1,2, Christian M. Dietrich1,2, Luise Beichert1,2, José R. Cardoso de Andrade3, Thomas Binhammer4, Jintao Fan1,2, and Uwe Morgner1,2 — 1Institute of Quantum Optics, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany — 2Cluster of Excellence PhoenixD, Welfengarten 1, D-30167 Hannover, Germany — 3Max-Born-Institute, Max-Born-Straße 2A, D-12489 Berlin — 4neoLASE GmbH, Hollerithallee 17, D-30419 Hannover, Germany
Optical parametric oscillators allow the generation of femtosecond, widely tunable radiation with high output power. This makes them a perfect tool for spectroscopy or imaging. Here, we show theoretical considerations for the generation of tunable UV radiation using intracavity processes in such a noncollinear optical parametric oscillator that provides fast tunable radiation in the visible spectral region from 440-720 nm. Two different conversion processes can be used for this purpose. First, an intracavity second harmonic generation process can be used to cover a wide range in the UV. However, this method has the disadvantage that the converted wavelength is selected by changing the crystal angle, which allows only slow tuning speeds. Therefore, an additional method is being investigated, which should enable fast tuning of the generated radiation by changing the cavity length only. This can be achieved via a non-collinear sum frequency generation process, but has the disadvantage that only the near UV region can be reached.