Mathematical consideration of Phase-Matching bandwidth, effective nonlinear coefficient and the walk-off effect for LiGa(SexS1-x)2 nonlinear crystals by using Genetic algorithm

In this paper the Phase-Matching bandwidth, effective nonlinear coefficient and the walk-off angle within the effective bandwidth of the LiGa(SexS1-x)2 biaxial nonlinear crystals are calculated using the Genetic algorithm (GA). This calculation is held for all tree principle XY, YZ and XZ planes individually. The results are shown the accuracy of the applied algorithm is quite qualified.