Abstract

Second order cascaded phase shift and all- optical intensity modulation are theoretically investigated by introducing an additional local phase mismatch along the wave propagation. The optimal position and strength of the local phase mismatch were found to maximize the cascaded phase shift at various input fundamental intensities. A maximum enhancement of 85% in the cascaded phase shift has been obtained relative to the uniformly phase mismatched case at a moderate input intensity. All-optical intensity modulation is also proposed with a similar structure. About 9 times intensity amplification was observed from a small input optical signal biased with a uniform fundamental intensity at another optimum set of the local phase mismatch parameters (position and strength).

© 1998 Optical Society of America