9 September 2006 Vortex beam shaping
Author Affiliations +
A novel method for tuning the orbital angular momentum (OAM) content of a vortex beam is presented. This approach makes use of the shaping of the odd and even components of the helical phase profile associated to the vortex. A relative azimuthal shift of the components results in the harmonic variation of the magnitude of the OAM density of the beam. We calculate the OAM content and show that for a beam with a vortex of topological charge m, the OAM per photon per unit length can be tuned continuously from (formula available in manuscript). We also observe the experimental propagation of the beam and compare the propagation parameters to our theoretical predictions.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. López-Mariscal, J. C. Gutiérrez-Vega, "Vortex beam shaping", Proc. SPIE 6290, Laser Beam Shaping VII, 62900O (9 September 2006); doi: 10.1117/12.679248; https://doi.org/10.1117/12.679248

Back to Top