Schulze, CDudley, Angela LFlamm, DDuparre, MForbes, A2014-06-172014-06-172013-07Schulze, C, Dudley, A, Flamm, D, Duparre, M and Forbes, A. 2013. Measurement of the orbital angular momentum density of light by modal decomposition. New Journal of Physics, vol. 15, pp 1-151367-2630http://iopscience.iop.org/1367-2630/15/7/073025/pdf/1367-2630_15_7_073025.pdfhttp://hdl.handle.net/10204/7453Copyright: 2013 IOP Publishing. This is an Open Access journal. The journal authorizes the publication of the information herewith contained. Published in New Journal of Physics, vol. 15, pp 1-15We demonstrate a versatile method for the measurement of the orbital angular momentum (OAM) density of an optical field. By performing a modal decomposition with digital holograms, we reconstruct the full optical field from a small set of single-point intensity measurements, from which optical vortices, global OAM and OAM density can be derived. We validate the method on defined OAM-carrying beams yielding fidelities in the OAM density measurement of up to 99%, and subsequently apply the technique to unknown fields from optical fibers.enModal decompositionBessel beamsOrbital angular momentum densityLaguerre–Gaussian beamsAOMArticleSchulze, C., Dudley, A. L., Flamm, D., Duparre, M., & Forbes, A. (2013). Measurement of the orbital angular momentum density of light by modal decomposition. http://hdl.handle.net/10204/7453Schulze, C, Angela L Dudley, D Flamm, M Duparre, and A Forbes "Measurement of the orbital angular momentum density of light by modal decomposition." (2013) http://hdl.handle.net/10204/7453Schulze C, Dudley AL, Flamm D, Duparre M, Forbes A. Measurement of the orbital angular momentum density of light by modal decomposition. 2013; http://hdl.handle.net/10204/7453.TY - Article AU - Schulze, C AU - Dudley, Angela L AU - Flamm, D AU - Duparre, M AU - Forbes, A AB - We demonstrate a versatile method for the measurement of the orbital angular momentum (OAM) density of an optical field. By performing a modal decomposition with digital holograms, we reconstruct the full optical field from a small set of single-point intensity measurements, from which optical vortices, global OAM and OAM density can be derived. We validate the method on defined OAM-carrying beams yielding fidelities in the OAM density measurement of up to 99%, and subsequently apply the technique to unknown fields from optical fibers. DA - 2013-07 DB - ResearchSpace DP - CSIR KW - Modal decomposition KW - Bessel beams KW - Orbital angular momentum density KW - Laguerre–Gaussian beams KW - AOM LK - https://researchspace.csir.co.za PY - 2013 SM - 1367-2630 T1 - Measurement of the orbital angular momentum density of light by modal decomposition TI - Measurement of the orbital angular momentum density of light by modal decomposition UR - http://hdl.handle.net/10204/7453 ER -