Abstract

Recently some of us have shown that the use of a correct ab initio approach to nonlinear pulse propagation simulations during nonlinear optical device designing can result in threefold efficiency increase with respect to the efficiency of existing solutions [1]. In that work we have focused on small beam size, and thus, high divergence regime where the effects of diffraction, spatial and temporal walk-off are difficult to separate and thus require numerical approach. Our collinear model of pulse propagation enabled modelling and optimization of a cascade third harmonic generation in a single element tripler. Herewith, we present the results of expanding our model to treatment of non-collinear optical configurations. To the best of our knowledge this is a first propagation model that enables non-collinear configurations while in minimal assumptions regime: unidirectionality and paraxial approximation.

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