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.
Reference:
Schulze, 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 1-15
Schulze, 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/10204/7453
Schulze, 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/10204/7453
Schulze 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.
Copyright: 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 1-15
ResearchSpace
