Nonlinear optical absorption within thick optical media is analyzed within the paraxial approximation, starting with the nonlinear wave equation for the optical field. Both irradiance-dependent and fluence-dependent absorbers are considered. An approximate solution for the transmitted optical power (and pulse energy) is shown to be useful within the strongly nonlinear regime.
© 1997 Optical Society of America
J. A. Hermann, "Nonlinear optical absorption in thick media," J. Opt. Soc. Am. B 14, 814-823 (1997)