We recently reported on a method for measuring orbital angular momentum (OAM) states of light based on the transformation of helically phased beams to tilted plane waves [ Phys. Rev. Lett. 105, 153601 (2010) ]. Here we consider the performance of such a system for superpositions of OAM states by measuring the modal content of noninteger OAM states and beams produced by a Heaviside phase plate.
© 2011 Optical Society of America
Diffraction and Gratings
Original Manuscript: February 23, 2011
Revised Manuscript: April 4, 2011
Manuscript Accepted: April 4, 2011
Published: May 11, 2011
Gregorius C. G. Berkhout, Martin P. J. Lavery, Miles J. Padgett, and Marco W. Beijersbergen, "Measuring orbital angular momentum superpositions of light by mode transformation," Opt. Lett. 36, 1863-1865 (2011)