Abstract
By numerically solving the nonlinear field equations, we simulate second-harmonic generation by laser pulses within a nonlinear medium without making the usual slowly-varying-amplitude approximation, an approximation which may fail when laser pulses of moderate intensity or ultrashort duration are used to drive a nonlinear process. Under these conditions we show that a backward-traveling, second-harmonic wave is created, and that the magnitude of this wave is indicative of the breakdown of the slowly-varying-amplitude approximation. Conditions necessary for experimental detection of this wave are discussed.
© 2003 Optical Society of America
Full Article | PDF ArticleMore Like This
Katia Gallo and Gaetano Assanto
J. Opt. Soc. Am. B 16(2) 267-269 (1999)
M. Hosseini Farzad and M. T. Tavassoly
J. Opt. Soc. Am. B 14(7) 1707-1715 (1997)
Eugenio DelRe, Angelo D’Ercole, and Aharon J. Agranat
Opt. Lett. 28(4) 260-262 (2003)