title: Measuring orbital angular momentum superpositions of light by mode transformation.
abstract: 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.
authors: Huygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands. j.berkhout@cosine.nl
authors: Gregorius C G
authors: GC
authors: Berkhout
authors: Martin P J
authors: MP
authors: Lavery
authors: Miles J
authors: MJ
authors: Padgett
authors: Marco W
authors: MW
authors: Beijersbergen