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Measuring the Topological Charge of Orbital Angular Momentum Beams by Utilizing Weak Measurement Principle.

Sci Rep; 9(1): 7993, 2019 May 29.
Artigo em Inglês | MEDLINE | ID: mdl-31142778
According to the principle of weak measurement, when coupling the orbital angular momentum (OAM) state with a well-defined pre-selected and post-selected system of a weak measurement process, there will be an indirect coupling between position and topological charge (TC) of OAM state. Based on this we propose an experiment scheme and experimentally measure the TC of OAM beams from -14 to 14 according to the weak measurement principle. After the experiment the intrinsic OAM of the beams changed very little. Weak measurement, Topological Charge, OAM beams.