Quantitative Measurement of the Orbital Angular Momentum of Light with a Single, Stationary Lens

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College of Natual Science and Mathematics, Physics and Astronomy


Beam splitters, Cylindrical lenses, Light beams, Optical angular momentum, Spatial light modulators, Vortex beams


We show that the average orbital angular momentum (OAM) of twisted light can be measured simply and robustly with a single stationary cylindrical lens and a camera. Theoretical motivation is provided, along with self-consistent optical modeling and experimental results. In contrast to qualitative interference techniques for measuring OAM, we quantitatively measure non-integer average OAM in mode superpositions.

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