Abstract

Recently there has been increasing interest in both the classical [ 1 ] and quantum [2] behaviours of interacting A¹²¹ nonlinearities. The interacting nonlinearities can be generally categorized into two different types: The interaction is said to be cooperating if the pump process and the backward process occur only between the same modes (e.g. ωw —>® 2ωw and 2ωw —® ωw). A well-known result of cooperating A¹²¹ nonlinearities is the remarkably large third order effects it produces [1]. Less well-known are examples of competing nonlinearities that happen when the backward process introduces different modes to the original pump model [3,4] (e.g. ωw—®2ωw and 2ωw —® ωw±δi).

© 1996 Optical Society of America