Second-harmonic and third-harmonic generation in a three-component fibonacci optical superlattice

Harmonic generation in a three-component Fibonacci optical superlattice (3CFOS) is analysed theoretically. The Fourier spectrum of the structural function of the 3CFOS is numerically calculated. The positions of reciprocal vectors are in good agreement with the theoretical prediction. The intensities of the second harmonic (SH) and third-harmonic (TH) are calculated relative to the depletion of the fundamental. The dependence of the SH and TH intensity on structural parameters is discussed. Numerical calculation shows that, compared with two-component Fibonacci optical superlattice (2CFOS), there are more plentiful harmonic spectrum and adjustable structure parameters in 3CFOS. By chosen the reciprocal vectors and adjusted the structure parameters, the higher transform efficiency of THG is obtained.