A theoretical analysis of the nonlinear quadratic interaction between two monochromatic plane waves at frequencies ω and 2ω in a Fabry–Perot cavity shows that all-optical control of reflectivity and transmissivity of the fundamental beam is possible under suitable conditions. We report all-optical switching of the fundamental beam for cavity lengths that vary from a few micrometers to a few millimeters. Specifically, we show that 100% all-optical switching can occur for a 6-µm cavity when the nonlinear coefficient is not greater than 20 pm/V and the input intensity does not exceed 10 GW/cm<sup>2</sup>. Our analytical results are obtained without use of the slowly varying envelope approximation and without resort to the undepleted-pump approximation.
© 2000 Optical Society of America
G. D'Aguanno, E. Angelillo, C. Sibilia, M. Scalora, and M. Bertolotti, "All-optical switching in a high- Q Fabry–Perot cavity filled with a quadratic material," J. Opt. Soc. Am. B 17, 1188-1196 (2000)