title: Compact flattop laser beam shaper using vectorial vortex.
abstract: In this paper, we demonstrate a compact flattop beam shaper to realize two-dimensional flattop focus through generating a second order full Poincaré beam. Liquid crystal material is used in the device as the voltage-dependent birefringent material to provide appropriate phase retardation modulation. The beam shaper is fabricated and tested. Experimental results show that high quality flattop profiles can be obtained with steep edge roll-off. The tolerance of different input beam sizes of the beam shaper is also verified in the experimental demonstration.
authors.affiliation: Electro-Optics Program, University of Dayton, 300 College Park, Dayton, Ohio 45469, USA. chengwen@udayton.edu
authors.forename: Wen
authors.initials: W
authors.lastname: Cheng
authors.forename: Wei
authors.initials: W
authors.lastname: Han
authors.forename: Qiwen
authors.initials: Q
authors.lastname: Zhan
mesh_terms: D001718:Birefringence; D017076:Computer-Aided Design; D004867:Equipment Design; D005898:Glass; D007834:Lasers; D008027:Light; D050866:Liquid Crystals; D012542:Scattering, Radiation