Spectral, Temporal and Spatial Characteristics of Few Cycle Optical Pulsed Beam

摘要

In this paper, the spectral, temporal and spatial properties of few cycle optical pulsed beam on propagation in free space has been studied. We analyze the spectral shifts of the ultrashort pulse in the far zone, and then discuss the scaling law of the pulsed sources. It is found that by the truncation of the pulsed beam, the scaling law may be destroyed. In this case the spectral shifts on propagation of the few cycle pulses may be observed in experiment. On the other hand, we reveal an analytical form of the pulsed Gaussian beam in free space and analyze the space-time coupling on propagation.