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Q: Fachverband Quantenoptik und Photonik

Q 43: Poster II

Q 43.12: Poster

Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof

High repetition rate continuously tunable near-IR and mid-IR nanosecond optical parametric oscillator — •Jens Bethge¹, Mateusz Ibek¹, Sophie Kröger², Hartmut Zimmermann³, and Edlef Büttner¹ — ¹Angewandte Physik & Elektronik GmbH, Berlin, Germany — ²Hochschule für Technik und Wirtschaft, Berlin, Germany — ³Crystal Laser Systems GmbH, Berlin, Germany

Optical Parametric Oscillators (OPOs) with nanosecond pulse duration are of vital interest for applications in, e.g., chemistry, biology, and life-science. Most common systems provide a few 10 ns pulse duration and only some 10 Hz repetition rate, limiting the photon throughput in most experiments. We demonstrate a system with less than 2 ns pulse duration and up to 15 kHz repetition rate providing access to a new measurement regime. Using a passively Q-switched diode pumped pump laser at a wavelength of 1064 nm results in a cost effective system with an integrated pump laser and a small footprint. Further, the repetition rate can be freely tuned down to a few Hz or single shot operation. The presented cavity features a periodically poled magnesium oxide doped lithiumniobate crystal with a FAN-out design allowing for fast continuous tuning. Tuning in the near-IR spectral region from 1400-1970 nm (Signal wave) and in the mid-IR region from 2200-4200 nm (Idler wave) is demonstrated by tuning the crystal position only. Pulse energies of up to 4 uJ are measured, i.e., peak powers of more than 2 kW for the Signal.