title: Measuring optical vortices in a speckle pattern using a multi-pinhole interferometer.
abstract: We show that it is possible to find and characterise optical vortices in a speckle pattern using a multi-pinhole interferometer. This measurement does not require an interferometric setup, providing great experimental ease. In addition, a multi-pinhole interferometer can be made arbitrarily large and can therefore be adjusted to the expected speckle size. We present experimental results confirming our understanding.
authors.affiliation: Huygens Laboratory, Leiden University, Leiden, The Netherlands. j.berkhout@cosine.nl
authors.forename: Gregorius C G
authors.initials: GC
authors.lastname: Berkhout
authors.forename: Marco W
authors.initials: MW
authors.lastname: Beijersbergen
mesh_terms: D005898:Glass; D007368:Interferometry / Q000295:instrumentation*; D054020:Lasers, Gas; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D012822:Silicon Dioxide
chemical_list: D012822:Silicon Dioxide