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Opt Lett. 2013 Jul 1;38(13):2348-50. doi: 10.1364/OL.38.002348.

Phase-shift interference-based wavefront characterization for orbital angular momentum modes.

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  • 1Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA.


Wavefront characterization for orbital angular momentum (OAM) modes is demonstrated using quadrature phase-shift interference. The phase fronts and intensity profiles of OAM(-2), OAM(-4), OAM(-6), and OAM(-8) are measured. Wavefront correlations between the experimental results and the pure Laguerre-Gaussian modes are calculated to evaluate the measurement. The measured results are in reasonable agreement with the anticipated results based on simulations.

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