Realization of general nondiffracting beams with computer-generated holograms.
A new class of solutions to the scalar wave equation was introduced recently that represents transversely localized but totally nondiffracting fields. We show by the method of stationary phase that any of these wave fields can be realized approximately with a laser and a single computer-generated hologram. We briefly discuss various techniques for coding and fabrication of the required hologram and the associated diffraction efficiencies. Using both binary-amplitude and four-level phase holograms, we demonstrate experimentally the formation of arbitrary-order Bessel beams and rotationally nonsymmetric beams.
Vasara
A
A
Department of Technical Physics, Helsinki University of Technology, Espoo, Finland.
Turunen
J
J
Friberg
A T
AT
D000465:Algorithms; D003199:Computer Systems; D006696:Holography / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D055095:Optics and Photonics