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Enhanced frequency up-conversion in Rb vapor

Vernier, A. and Franke-Arnold, S. and Riis, E. and Arnold, A. S. (2010) Enhanced frequency up-conversion in Rb vapor. Optics Express, 18 (16). pp. 17020-17026. ISSN 1094-4087

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We demonstrate highly efficient generation of coherent 420 nm light via up-conversion of near-infrared lasers in a hot rubidium vapor cell. By optimizing pump polarizations and frequencies we achieve a single-pass conversion efficiency of 260% per Watt, significantly higher than in previous experiments. A full exploration of the coherent light generation and fluorescence as a function of both pump frequencies reveals that coherent blue light is generated close to Rb-85 two-photon resonances, as predicted by theory, but at high vapor pressure is suppressed in spectral regions that do not support phase matching or exhibit single-photon Kerr refraction. Favorable scaling of our current 1 mW blue beam power with additional pump power is predicted.

Item type: Article
ID code: 28924
Keywords: electromagnetically induced transparency, 2-photon spectroscopy, diode-laser, rubidium, coherent, cesium, atoms, Physics, Atomic and Molecular Physics, and Optics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Depositing user: Pure Administrator
Date Deposited: 21 Mar 2011 15:28
Last modified: 01 Oct 2015 17:33

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