27 September 2016 Digital control of spatial coherence in vortex beams
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A means to digitally generate a partially coherent beam with orbital angular momentum is presented. Our approach is based on encoding the randomness of broadband light passing through a spiral phase plate in a spatial light modulator. We illustrate the technique by generating partially coherent beams with orbital angular momentum content and different coherence lengths, with no moving optical elements. We study the cross correlation spectra which yields to good agreement with theory.
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Benjamin Perez-Garcia, Benjamin Perez-Garcia, Adad Yepiz, Adad Yepiz, Raul I. Hernandez-Aranda, Raul I. Hernandez-Aranda, Andrew Forbes, Andrew Forbes, Grover A. Swartzlander, Grover A. Swartzlander, "Digital control of spatial coherence in vortex beams", Proc. SPIE 9950, Laser Beam Shaping XVII, 99500Y (27 September 2016); doi: 10.1117/12.2238248; https://doi.org/10.1117/12.2238248

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