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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik

Q 15.70: Poster

Montag, 14. März 2011, 16:30–19:30, P1

Frequency comb stabilization with zero phase slip frequency for high repetition rate carrier envelope sensitive experiments — •Matthias Hensen, Christian Strüber, and Walter Pfeiffer — Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany

In the regime of few-cycle laser pulses light-matter interaction becomes sensitive to the absolute phase of the electric field. The stabilization and control of this carrier envelope phase (CEP) made it for example possible to extend the time-resolution in laser spectroscopy to the attosecond regime. Most present experiments rely on amplified pulses and thus it suffices to stabilize the frequency comb modulo a constant phase slip frequency, commonly chosen as one quarter of the oscillator repetition rate. However, this limits the applicability of CEP stabilized lasers in experiments using directly the high repetition rate oscillator pulses. To overcome this limitation we have built a f-2f interferometer in which the fundamental-arm is shifted in frequency by an acousto-optic modulator. Using a commercial phase locking control electronics this allows stabilizing the CEP at zero phase slip frequency. Long term CEP stabilization of <7 fs laser pulses with a rms phase noise of 130 mrad is achieved for closed-loop operation.