Measuring the complex orbital angular momentum spectrum and spatial mode decomposition of structured light beams
arXiv:1706.04788 · doi:10.1364/OPTICA.4.001350
Abstract
Light beams carrying orbital angular momentum are key resources in modern photonics. In many applications, the ability of measuring the complex spectrum of structured light beams in terms of these fundamental modes is crucial. Here we propose and experimentally validate a simple method that achieves this goal by digital analysis of the interference pattern formed by the light beam and a reference field. Our approach allows one to characterize the beam radial distribution also, hence retrieving the entire information contained in the optical field. Setup simplicity and reduced number of measurements could make this approach practical and convenient for the characterization of structured light fields.
8 pages (including Methods and References), 6 figures
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- Enhanced detection techniques of Orbital Angular Momentum states in the classical and quantum regimes
- Regression of high dimensional angular momentum states of light
- Astigmatic tomography of orbital angular momentum superpositions
- Directly measuring mode purity of single component in superposed optical vortices
- Digital sorting perturbed laguerre-gaussian beams by radial numbers via high order intensity moments
- Vortex Propagation in Orbital Angular Momentum Beams and the Effects of a Limited Aperture
- One-time measurement to characterize complex amplitude single component in symmetry superposed optical vortices