Abstract
Intensity fluctuation in linearly chirped Gaussian pulse stacking (LCGPS) is studied systematically based on spectral analysis. Two-pulse LCGPS and multi-pulse LCGPS are analyzed with simulations based on Fourier transform. The variation of fluctuation frequencies with the number, chirp factor, time delay and pulse width of the Gaussian pulses is discussed in the case of multi-pulse LCGPS with inital pulses of the same amplitude and the same time delay. Finally a brief discussion is presented on the general case of multi-pulse LCGPS with initial pulses of different amplitude attenuation and different time delay. The results show that there are several separated frequency sidebands in the intensity spectrum of the stacked pulse, responsible for the intensity fluctuation. The higher frequency sidebands would have less contribution to the fluctuation due to smaller amplitude overlapping. The fluctuation frequencies increase with the growth of the chirp factor and time delay, and the decrease of pulse width of the initial Gaussian pulses.
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