Measuring optical vortices in a speckle pattern using a multi-pinhole interferometer.
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.
Berkhout
Gregorius C G
GC
Huygens Laboratory, Leiden University, Leiden, The Netherlands. j.berkhout@cosine.nl
Beijersbergen
Marco W
MW
D005898:Glass; D007368:Interferometry / Q000295:instrumentation*; D054020:Lasers, Gas; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D012822:Silicon Dioxide
D012822:Silicon Dioxide