Hamburg 2009 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 55: Poster III
Q 55.36: Poster
Thursday, March 5, 2009, 16:30–19:00, VMP 8 Foyer
Temporal pulse characterization of a multi-TW three-cycle optical parametric chirped pulse amplifier — •Raphael Tautz1, Laszlo Veisz1, Daniel Herrmann1, Karl Schmid1,2, and Ferenc Krausz1,2 — 1Max-Planck-Institut für Quantenoptik, Garching, Germany — 2Ludwig-Maximilians-Universistät, München, Germany
We report on our home-built diagnostic tools, which are specially designed and optimized to characterize our ultra-intense three-cycle light pulses with duration of 8 fs, generated by an optical parametric chirped pulse amplifier (OPCPA). An all-reflective single-shot second order intensity autocorrelator has been designed and realized, which is suitable to perform a real-time observation of pulse-duration and -shape with a repetition rate of 10 Hz. Hereby a temporal resolution of 200 as and an observation window of 560 fs have been achieved. Besides it is extendable to a single-shot second harmonic generation frequency resolved optical gating (SHG FROG) device within few minutes. Its high accuracy and repetition rate provide excellent feedback for optimizing the pulse-duration using an accousto-optical modulator. Furthermore the high dynamic range of the already existing third order intensity correlator for contrast measurements has been improved. The measureable pulse intensity contrast spans over more than 10 orders of magnitude within +- 300 ps. This allows a more accurate investigation of the contrast of our OPCPA system, uncovering the contribution from superfluorescence and seed contrast. Altogether these devices allow a fast and reliable characterization of our multi-TW three-cycle pulses.