Orange avalanche upconversion for high-resolution laser spectroscopy Ph. Goldner, O. Guillot-Noël, G. Dantelle, M. Mortier, T. H. My and F. Bretenaker Eur. Phys. J. Appl. Phys., 37 2 (2007) 161-168 Published online: 17 January 2007 DOI: 10.1051/epjap:2007007