title: Random sources generating ring-shaped beams.
abstract: Two classes of scalar, stochastic sources are introduced, each capable of producing far fields with intensities forming rings. Although the Bessel-Gaussian and the Laguerre-Gaussian Schell-model sources are described by two different math models, the behavior of their degrees of coherence and, hence, the shapes of their far fields are qualitatively similar. The new beams are of importance for optical methods of particle manipulation.
authors: Department of Physics, Huzhou Teachers College, Huzhou 313000, China.
authors: Zhangrong
authors: Z
authors: Mei
authors: Olga
authors: O
authors: Korotkova