We compare two phase optical elements that are employed to generate approximate Bessel–Gauss beams of arbitrary order. These elements are the helical axicon (HA) and the kinoform of the desired Bessel–Gauss beam. The HA generates a Bessel beam (BB) by free propagation, and the kinoform is employed in a Fourier spatial filtering optical setup. As the main result, it is obtained that the error in the BBs generated with the kinoform is smaller than the error in the beams obtained with the HA. On the other hand, it is obtained that the efficiencies of the methods are approximately 1.0 (HA) and 0.7 (kinoform).
© 2014 Optical Society of America
Diffraction and Gratings
Original Manuscript: September 12, 2013
Revised Manuscript: December 22, 2013
Manuscript Accepted: December 24, 2013
Published: February 5, 2014
Victor Arrizón, Ulises Ruiz, Dilia Aguirre-Olivas, David Sánchez-de-la-Llave, and Andrey S. Ostrovsky, "Comparing efficiency and accuracy of the kinoform and the helical axicon as Bessel–Gauss beam generators," J. Opt. Soc. Am. A 31, 487-492 (2014)