Changes in the spectrum of diffracted pulsed cosh-Gaussian beams propagating through atmospheric turbulence

摘要

The spectral changes of diffracted pulsed cosh-Gaussian (ChG) beams propagating through atmospheric turbulence are studied both analytically and numerically. It is shown that the on-axis spectrum is blue-shifted, and the spectrum becomes red-shifted with increasing transverse distance. There exist spectral switches at off-axis points. The spectral shifts and the transition height decrease as the turbulence increases and the lower-order spectral switch may disappear. The critical position at which the spectral switch takes place becomes closer to the axis as the truncation parameter and the decentered parameter increase. The transition height decreases with increasing truncation parameter. The results are interpreted physically.