Analysis of Ultrashort Pulse Waveform and Broadening Caused by Atmospheric Turbulence and Dispersion

Laser communication technology is an important mean for achieving effective signal transmission. However,the quality of laser beam was constrained by atmospheric scattering,absorption and turbulence seriously.The turbulence-induced and scattering-induced pulse width broadening in laser link was analyzed.The variations of pulse width broadening with the index of refraction structure constant,input pulse width,and propagation distance were calculated.The characteristics of laser waveform with different original pulse width and emission energies were compared. The simulation results show that the width of laser increases correspondingly when the propagation distance or the index increases.It means that laser with large pulse width is affected by atmosphere weakly,meanwhile,the power of laser decreases when the pulse width broadening appeares.The conclusion has certain significance to the applications of ultrashort pulse.