Simulated annealing: A technique for optimizing multiple QPM in thue-morse sequence

Thue-Morse is a quasi-periodic sequence that can be used in optical super lattices to generate multiple-Quasi-Phase Matching (QPM) profiles because it has number of reciprocal vectors in its structure. However, it results in randomized peaks. In order to overcome this difficulty, we introduce Simulated Annealing Algorithm (SA) which perturbs the Thue-Morse (TM) optical superlattice to produce optimized multiple QPM with equal intensities. The parameters like algorithm temperature, perturbation size and choice of peaks are playing key role in designing the multiple peaks are discussed.