title: Generation of hollow Gaussian beam by phase-only filtering.
abstract: We propose a novel phase retrieval algorithm in Hankel (or called Fourier-Bessel) transform domains by using Monte-Carlo method. Based on the proposed algorithm, we investigate the generation of Gaussian-like beams, such as hollow Gaussian beam, Bessel-Gaussian beam and Laguerre-Gaussian beam, with double phase filtering operations. The phase distributions of filters are determined by employing the proposed phase retrieval algorithm. The advantage of the method is that the total energy of the beam is conservative. Numerical simulations are shown to demonstrate the validity of the scheme.
authors.affiliation: Department of Automation Measurement and Control Engineering, Harbin Institute of Technology, Harbin 150001, PR China. zjliuv@gmail.com
authors.forename: Zhengjun
authors.initials: Z
authors.lastname: Liu
authors.forename: Jingmin
authors.initials: J
authors.lastname: Dai
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Sun
authors.forename: Shutian
authors.initials: S
authors.lastname: Liu