title: Dynamic switching of optical vortices with dynamic gamma-correction liquid crystal spiral phase plate.
abstract: Generation and dynamic switching of optical vortices from charge 1 up to charge 6 at wavelength of 0.6328-microm by one dynamic gamma-correction liquid crystal spiral phase plate are reported. The liquid crystal spiral phase plate comprises 46 slices, which are driven by a 16- channel voltage output card. The spiral phase plate was designed based on the relationship between the topological charge purity of an optical vortex generated by the spiral phase plate and the total number of slices. The calculation results show that a minimum slice number of 44 is required for generating optical vortices up to charge 6 with charge purity above 94%.
authors.forename: Q
authors.initials: Q
authors.lastname: Wang
authors.forename: X W
authors.initials: XW
authors.lastname: Sun
authors.forename: P
authors.initials: P
authors.lastname: Shum
authors.forename: X J
authors.initials: XJ
authors.lastname: Yin