Effective method of anti-Stokes generation by quasi-phase-matched stimulated Raman scattering

We have proposed a new method of enhancing the efficiency of pulsed anti-Stokes stimulated Raman generation by using quasi-phase matching in a stack of alternating layers with different Raman properties. We have derived a system of coupled differential equations describing a multifrequency stimulated Raman process with interacting waves propagating in both the forward and the backward direction. We show that the efficiency of anti-Stokes generation can reach 20-30%. We also show that an optimized layered structure can perform for a broad range of pump parameters, such as pulse duration, intensity, and Fresnel number.