EFFICIENCY OF SECOND-HARMONIC GENERATION WITH BESSEL BEAMS

A numerical model is used to investigate the conversion efficiency of second-harmonic generation with "nondiffracting" Bessel beams. We experimentally validate the model and show, in contrast to a previous prediction, that the conversion efficiency is always less than for Boyd-Kleinman focused Gaussian beams. [S1050-2947(99)02909-1].