Bistability induced in a second-harmonic signal generated in the presence of the Kerr effect in a prism coupler is investigated. Using a rigorous solution provided by Maxwell's equations, we analyze this behavior, taking into account third-order nonlinearity (Kerr nonlinearity). Comparison with a Kerr-based bistable device shows the interest of quadratic nonlinearity for integrated optics. We show that the bistable behavior depends on the sign of third-order nonlinearity. The numerical simulations are presented for both an incident plane wave and a spatially limited incident beam.
© 1997 Optical Society of America
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