Open AccessGaussian beam with non-spiral optical vortex
Author(s) -
Xiumin Gao,
Song Hu,
Jinsong Li,
Hanming Guo,
Jian Wang,
Songlin Zhuang
Publication year - 2010
Publication title -
natural science
Language(s) - English
Resource type - Journals
eISSN - 2150-4105
pISSN - 2150-4091
DOI - 10.4236/ns.2010.23031
Subject(s) - topological quantum number , optical vortex , vortex , physics , optics , spiral (railway) , gaussian beam , intensity (physics) , diffraction , scalar (mathematics) , topology (electrical circuits) , gaussian , beam (structure) , charge (physics) , geometry , quantum mechanics , mathematics , mechanics , mathematical analysis , combinatorics
Optical vortex has attracted much interest re-cently due to its novel properties and applica-tions. In this paper, the focusing properties of Gaussian beam containing one non-spiral opti-cal vortex are investigated by means of scalar diffraction theory. Simulation results show that topological charge of non-spiral optical vortex affects optical intensity distribution in focal re-gion considerably, and non-spiral focal pattern may also occur. Multiple intensity peaks may appear companying with center main focal spot under condition of higher topological charge. In addition, the number of weak intensity peak outside of the center main intensity peak is re-lated to the value of topological charge