Pulse broadening and beam spread of polarized laser pulse beam on slant path in turbulence atmospheric

摘要

This paper is based on the extended Huygens - Fresnel principle, the two-frequency mutual coherence function and the Rytov approximation method. We have derived the novel expressions for the pulse broadening and beam effective spread radius of the elliptically polarized Gaussian pulse beam propagating through atmospheric turbulence along a slant path. Meanwhile the effect of weak optical turbulence on the pulse broadening and the beam spread in a slant path are analyzed. The results show that the pulse broadening of the elliptically polarized Gaussian pulse beam on slant path turbulence atmospheric depends on the zenith angle eta and receiver height H. The inner scale factor beta appears to have an insignificant effect on the pulse broadening. Beam spread is mainly depends on the initial waist radius w(0), wavelength lambda and polarization angle phi. With the increasing of propagation distance L, beam effective spread radius w(L) decreases as w(0) increases, and it increases with lambda, in addition, w(L) increases as phi increases. (C) 2015 Elsevier GmbH. All rights reserved.