Generation of hollow Gaussian beams by spatial filtering.
ABSTRACT We demonstrate that hollow Gaussian beams can be obtained from Fourier transform of the differentials of a Gaussian beam, and thus they can be generated by spatial filtering in the Fourier domain with spatial filters that consist of binomial combinations of even-order Hermite polynomials. A typical 4f optical system and a Michelson interferometer type system are proposed to implement the proposed scheme. Numerical results have proved the validity and effectiveness of this method. Furthermore, other polynomial Gaussian beams can also be generated by using this scheme. This approach is simple and may find significant applications in generating the dark hollow beams for nanophotonic technology.
Conference Proceeding: Characterization of elliptic dark hollow optical beams[show abstract] [hide abstract]
ABSTRACT: We review the current state of research on elliptic dark hollow beams with particular emphasis on Mathieu and Ince-Gauss beams. The propagation properties and main applications are revised and discussed.IEEE/LEOS Summer Topical Meetings, 2008 Digest of the; 08/2008