AT THE CROSSROADS OF NONLINEAR OPTICS AND FOURIER OPTICS

The use of materials displaying nonlinear optical properties in device s based on Fourier optics, such as focusing systems, leads to a lot of new ideas mostly in the field of nonlinear image processing. This pap er presents the principle of nonlinear filtering in a two lens set-up, and two applications, the first one to a method for nonlinear suscept ibility measurements the second one to information transfer from a wav elength to another through Raman scattering.