Enhanced frequency up-conversion in Rb vapor
Abstract
We demonstrate highly efficient generation of coherent 420nm 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 85Rb 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 1mW blue beam power with additional pump power is predicted.
Cite
@article{arxiv.0911.0812,
title = {Enhanced frequency up-conversion in Rb vapor},
author = {A. Vernier and S. Franke-Arnold and E. Riis and A. S. Arnold},
journal= {arXiv preprint arXiv:0911.0812},
year = {2010}
}
Comments
6 pages, 4 figures. Modified to include referees' improvements