%A Lü Zhang-De
%T Off-axial elliptical cosine-Gaussian beams and their propagation properties
%0 Journal Article
%D 2007
%J Chin. Phys. B
%R 10.1088/1009-1963/16/5/026
%P 1320-1326
%V 16
%N 5
%U {http://cpb.iphy.ac.cn/CN/abstract/article_22413.shtml}
%8 2007-05-20
%X In this paper, a new kind of light beam called off-axial elliptical
cosine-Gaussian beam
(ECosGBs) is defined by using the tensor method. An analytical propagation
expression for the ECosGBs passing through axially nonsymmetrical optical
systems is derived by using vector integration. The intensity distributions
of ECosGBs on the input plane, on the output plane with the equivalent
Fresnel number being equal to 0.1 and on the focal plane are respectively
illustrated for the propagation properties. The results indicate that an
ECosGB is eventually transformed into an elliptical
cosh-Gaussian beam. In other words, ECosGBs and
cosh-Gaussian beams act in a reciprocal manner after propagation.