Applied Physics Letters
Phase matching of two-photon resonant 4-wave mixing processes in alkali metal vapors
Gary C. Bjorklund, John E. Bjorkholm, P. F. Liao, R. H. Storz
Abstract
Many classes of two-photon resonant 4-wave mixing processes in alkali metal vapors are shown to be phase matchable by adjusting the frequencies of the fundamental waves. Essentially perfect phase matching of one such process in Na vapor is demonstrated experimentally and shown for plane waves to be insensitive to variations in spatial distribution of the nonlinear medium.