Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 54: Poster 3
Q 54.34: Poster
Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II
Progress in metering the absolute phase — •Tim Rathje1, A.Max Sayler1, Max Möller1, Daniel Adolph1, Dominik Hoff1, Walter Möller1, Gero Stiebenz2, and Gerhard G. Paulus1 — 1Institut für Optik und Quantenelektronik and Helmholtz-Institut Jena, Max-Wien-Platz 1, 07743 Jena, Germany — 2APE GmbH, Plauener Str. 163-165, 13053 Berlin, Germany
We report on progress in metering the absolute phase of few-cycle laser pulses. The respective phasemeter (PM) is based on measuring the asymmetry of photoelectrons emitted in opposite directions. A prescision of 80 mrad is achived for every single shot in real-time. At the same time an accurate measurement of the pulse duration is obtained. So far this technique was restricted to sub-8 fs laser pulses. By combining the PM with polarization gating we extend the measurement range of the PM up to a pulse length of 12 fs. Together with a fast electronic real-time circuit, the PM also allows for improvement of the carrier-envelope phase stabilization of few-cycle laser pulse systems by 25 % as compared to commercial f-2f interferometric stabilization systems. This electronic circuit delivers the asymmetry parameter in less than 20 µs with 100 % duty cycle. A parallel use of a PM with phase-sensitive experiments and tagging each measurement with the absolute phase opens the door to phase-senstive measurements without a phase-stabilized laser system (phase-tagging).