München 2019 – wissenschaftliches Programm
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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 3: Laser Systems I
K 3.1: Vortrag
Dienstag, 19. März 2019, 14:00–14:20, HS 3
Build-up dynamics in an optical parametric oscillator with synchronized pump modulation — •Moritz Floess1, Tobias Steinle1,2, Florian Moerz1, Heiko Linnenbank1, Andy Steinmann1, and Harald Giessen1 — 14th Physics Institute and Research Center Scope, University of Stuttgart, D-70569 Stuttgart — 2ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
We investigate the build-up dynamics in an optical parametric oscillator (OPO) by synchronously modulating the intensity of the pump beam. An 8-W, 1032-nm, 450-fs Yb:KGW oscillator with 41 MHz repetition rate serves as the OPO pump source. The intensity modulation is realized with an acousto-optical modulator (AOM), which is electronically locked to the repetition rate of the pump laser. The AOM bandwidth of 200 MHz enables shutter times of only ~7 ns. Therefore, the full pump power is available within one laser cycle. This allows to investigate the temporal build-up process of the signal pulses in the OPO cavity. Furthermore, we also have access to the dynamics in the spectral domain by using a dispersive Fourier transformation (DFT) scope, which allows to measure spectra of individual, isolated pulses.