Hamburg 2009 – scientific programme

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A: Fachverband Atomphysik

A 20: Precision Spectroscopy of Atoms and Ions III

A 20.3: Talk

Wednesday, March 4, 2009, 17:30–17:45, VMP 6 HS-B

Two Photon Direct Frequency Comb Spectroscopy with Chirped Pulses — •Sascha Reinhardt, Elisabeth Peters, Theodor W. Hänsch, and Thomas Udem — Max-Planck-Institut für Quantenoptik, 85748 Garching

Spectroscopy with frequency combs offers new ways of investigations of atoms and molecules. The recorded spectrum that is obtained with a frequency comb is influenced by several parameters of the comb like noise of the repetition rate and structure of the pulses. With a Caesium two photon spectroscopy the influence of a chirped pulse on the line strength of the observed transition is measured and compared with a theoretical model. The frequency comb is obtained by a mode locked picoseconds laser and the pulses are chirped with an optical glass fibers. The behaviour of the experimental observation and theoretical model is similar over a large parameter space.