Definition of the waist plane for general astigmatic Gaussian beams.
We propose a possible generalization of the waist plane for a two-dimensional astigmatic Gaussian beam as a plane of minimal spot area of the beam during propagation. It is shown that the defocusing component of the beam phase vanishes in this plane. Some examples of astigmatic Gaussian beams and corresponding area waist planes are presented and discussed.
Evgeniya
E
Razueva
Alexander
A
Krutov
Eugeny
E
Abramochkin