Dresden 2011 – scientific programme

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MO: Fachverband Molekülphysik

MO 6: Poster: Cold Molecules

MO 6.4: Poster

Monday, March 14, 2011, 16:00–18:00, P1

Improvement of double resonance optical pumping in application of frequency stabilization * — •Yubing Yang — Department of Molecular and Optical Physics, Institute of Physics, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany

The high-resolution spectrum for ⁸⁷Rb has been used in applications such as laser frequency stabilization, atomic clocks and laser cooling. A spectrum with a high signal-noise ratio and a narrow line width can be obtained by double resonance optical pumping (DROP) [1]. Compared with optical-optical resonance pumping, the DROP spectrum shows a much better signal-noise ratio and narrower spectral line width.

Based on the 5S_1/2-5P_3/2-5D_3/2 ladder-type atomic system, the effects of the combination of laser polarizations, laser power and alignment of the two lasers on the spectrum obtained by DROP are studied theoretically and experimentally. Furthermore, different coupling beam wavelengths and laser beam directions are investigated. In order to improve the spectrum, a new experimental setup of DROP is present and it is shown that this spectrum can be used to stabilize the laser frequency.

[1]H.S.Moon,L.Lee,andJ.B.Kim,J.Opt.Soc.Am.B,24,2157(2007) * supported by China Scholarship Council