Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 5: Ultrakurze Laserpulse: Erzeugung 1
Q 5.2: Vortrag
Montag, 12. März 2012, 10:45–11:00, V38.01
Sub-10 fs non-collinear optical parametric chirped-pulse amplifier at 20 kHz — •Jiaan Zheng1, Wataru Kobayashi1, Thomas Hamann1, Daniel Nürenberg1, Markus Lührmann2, Johannes A. L'huillier2, Richard Wallenstein2, and Helmut Zacharias1 — 1Physikalisches Institut, Westfälische Wilhelms-Universität, Wilhem-Klemm-Str 10, 48149 Münster, Germany — 2Fachbereich Physik, TU Kaiserslautern, Erwin-Schrödinger-Str.46, 67663 Kaiserslautern, Germany
We report results for a two-stage three-pass non-collinear optical parametric chirped-pulse amplifier (OPCPA) working at a repetition rate of 20 kHz. A grism-pair stretcher is designed based on global dispersion balance and provides a large stretching ability and broad bandwidth up to 320nm. The seed pulses are stretched to about 88 ps from 690 nm to 1000 nm and amplified to 140 μJ, corresponding to an average power of 2.8 W. The amplified signal pulses are compressed with 350 mm SF57 and 250 mm fused silica glass blocks. Using multi-photon inter-pulse interference phase scans the residual spectral phase is detected up to the 5th order and fed back to an acousto-optical programmable dispersive filter for compensation. After compression pulses of 9.6 fs duration with a pulse energy of 125 μJ are obtained, corresponding to a peak power of 13 GW.