Berlin 2014 – scientific programme
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MO: Fachverband Molekülphysik
MO 13: Posters 3: Cold Molecules, Helium Nano Droplets, and Experimental Techniques
MO 13.26: Poster
Wednesday, March 19, 2014, 16:30–18:30, Spree-Palais
Fast, precise, and widely tunable frequency control of a cw optical parametric oscillator — •Alexander Prehn, Rosa Glöckner, Martin Zeppenfeld, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
Frequency combs offer a variety of new possibilities for frequency measurement and control. Here we report on the widely tunable, fast and precise frequency control of a commercially available optical parametric oscillator (OPO) locked to a frequency comb. In addition to stabilization to sub-MHz precision, the approach allows for fast frequency ramps in the whole tuning range of 100 GHz. Frequency ramps over more than 10 GHz performed in less than 10 ms are demonstrated, with the OPO instantly relocked to the frequency comb after the ramp at any desired frequency.
We show two complementary examples for the application of the technique. First, rovibrational transitions of CFH3 molecules stored in an electric trap [1] can be driven quasi-simultaneously even though the transitions are spaced more than 10 GHz apart. Second, we show the frequency resolution of the system by means of Doppler-free spectra of rovibrational lines of H2CO.
[1] M. Zeppenfeld et al., Nature 491, 570-573 (2012).