TECHNIQUE FOR PHASE-MATCHING PARAMETRIC GAIN IN NONLINEAR WAVE-GUIDES

We discuss a novel technique for phase matching parametric gain in non linear waveguides. We show that the gain may be extended to regions of normal or large anomalous dispersion for arbitrary detuning through t he introduction of a passive linear waveguide that is weakly coupled a nd nearly phase matched to the Evolution equations are solved exactly in the perturbation limit, and maps of the gain region as well as plot s of the evolution of the various modes are presented for a variety of parameter sets.