Erlangen 2022 – wissenschaftliches Programm
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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 1: Laser Systems
K 1.1: Vortrag
Dienstag, 15. März 2022, 10:30–10:45, K-H4
High-power, ultra-broadband, femtosecond non-collinear optical parametric oscillator in the visible spectral range (VIS-NOPO) — •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
Ultrafast visible radiation is of great importance for many applications ranging from spectroscopy to metrology. Unfortunately, most of the visible range is not covered by laser gain media, hence optical parametric oscillators offer a solution. Besides a high-power broadband laser source, the rapid frequency tunability of pulses with high-power spectral densities is a clear advantage for experiments such as multicolor spectroscopy or imaging. Here, we demonstrate a high-power, ultra-broadband, rapidly tunable femtosecond non-collinear optical parametric oscillator with a signal tuning range of 440-720 nm. The VIS-NOPO is pumped by the third harmonic of an Yb-fiber laser at 345 nm. Moreover, the signal wavelength is tuned by changing the cavity length only. Output powers up to 452 mW and pulse duration down to 268 fs with a repetition rate of 50.2 MHz are achieved. To the best of our knowledge, this is the first demonstration of a quickly tunable femtosecond NOPO that covers nearly the entire visible spectral range.