Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects

Q 30.45: Poster

Tuesday, March 18, 2014, 16:30–18:30, Spree-Palais

Building a laser system with kHz linewidth for Rydberg EIT experiments — •Thomas Kerst, Vladislav Gavryusev, Hanna Schempp, Martin Robert-de-Saint-Vincent, Georg Günter, Shannon Whitlock, and Matthias Weidemüller — Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg

Recent experiments have shown that light coupled to atoms in the Rydberg state can be used to realize effective photon-photon interactions [1]. Thus they can act as a single photon source with well-controllable properties [2]. Key element for this result is Electromagnetically Induced Transparency (EIT). The narrow EIT resonance width required for the realization of effective photon-photon interactions demands very narrow laser linewidths.

Here we present a commercial stabilization system based on a Fabry-Pérot cavity from Stable Laser Systems, which will allow to achieve linewidths of the order of few kHz for both 780nm and 960nm wavelengths. Key elements are the precise temperature stabilization of the high finesse cavity inside the vacuum housing as well as a very stable DDS based AOM system for frequency-locking [3].

[1] C. S. Hofmann et al. Phys. Rev. Lett. 110, 203601 (2013)

[2] M. M. Müller et al., Physical Review, A 87, 053412 (2013)

[3] H. Labuhn, Diploma thesis, Universität Heidelberg (2013)