We introduce and report experimental realization of amethod to measure the topological charge of radiation carrying orbital angular momentum by accessing a small portion of the wavefront. The method exploits the superposition of matched-curvature beams in separated frequency bands to achieve a differential measure realized by a pair of phase-sensitive detectors. The method is suitable for long-distance communications.
A composite beam of radiation with orbital angular momentum allows effective local, single-shot measurement of topological charge / B. Paroli, M. Siano, M.A.C. Potenza. - In: OPTICS COMMUNICATIONS. - ISSN 0030-4018. - 459(2020 Mar 15). [10.1016/j.optcom.2019.125049]
A composite beam of radiation with orbital angular momentum allows effective local, single-shot measurement of topological charge
B. Paroli
Primo
;M. SianoSecondo
;M.A.C. PotenzaUltimo
2020
Abstract
We introduce and report experimental realization of amethod to measure the topological charge of radiation carrying orbital angular momentum by accessing a small portion of the wavefront. The method exploits the superposition of matched-curvature beams in separated frequency bands to achieve a differential measure realized by a pair of phase-sensitive detectors. The method is suitable for long-distance communications.
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