We investigate output mode purities of Laguerre–Gaussian (LG) beams generated from four typical simultaneous amplitude and phase modulation methods with phase-only spatial light modulators (SLMs). Numerical simulations supposing the practical SLM, i.e., stepwise phase modulation with a pixelated device, predict an output mode purity of beyond 0.969 for the LG beams of less than radially and azimuthally fifth order. Experimental results of generating LG beams are also shown to demonstrate the effects of the simultaneous phase and amplitude modulation.
© 2008 Optical Society of AmericaFull Article | PDF Article
Peter John Rodrigo, Ivan R. Perch-Nielsen, and Jesper Glückstad
Opt. Express 14(12) 5588-5593 (2006)
Gabriel Milewski, David Engström, and Jörgen Bengtsson
Appl. Opt. 46(1) 95-105 (2007)
Yoshiyuki Ohtake, Taro Ando, Norihiro Fukuchi, Naoya Matsumoto, Haruyasu Ito, and Tsutomu Hara
Opt. Lett. 32(11) 1411-1413 (2007)