Abstract
It was recently shown, both experimentally1 and theoretically,2 that coherent interactions through quadratic nonlinearities lead to very interesting phenomena with potential applications to all-optical devices and parametric processes. Unlike cubic nonlinear processes, the mutual trapping of the fundamental and the second-harmonic waves when they propagate simultaneously in a material with χ(2) nonlinearity, i.e., a spatial soliton, imposes supplementary conditions; thus the stationary solutions are either zero- or one-parameter families.
© 1995 Optical Society of America
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