Numerical simulation on measurement for optical arbitrary waveforms using blind frequency resolved optical gating based on PPLN

A novel scheme of blind frequency resolved optical gating (Blind-FROG) measurement for optical arbitrary waveforms, based on sum frequency effect in periodically poled lithium niobate (PPLN) optical waveguide, is proposed. The proposed scheme is very simple, low cost and good noise performance. Furthermore, it can simultaneously measure two arbitrary, potentially very complex pulses. Through theoretical analysis and numerical simulation, the performance of the scheme is studied. The results show that, the accuracy of measurement degrades with the increase of the two optical arbitrary waveforms complexity; Nevertheless, the smaller the polarization periodic mismatching is, the higher the measurement accuracy becomes; And the accuracy of the complete measurement system also can be improved by increasing the number of iterations.