Infrared and Laser Engineering, Volume. 50, Issue 9, 20210145(2021)

Advances on the measurement of orbital angular momentum spectra for laser beams (Invited)

Shiyao Fu1...2,3, Lei Huang1,2,3, Yanlai Lv1,2,3, and Chunqing Gao1,23 |Show fewer author(s)
Author Affiliations
  • 1School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
  • 2Key Laboratory of Information Photonics Technology, Ministry of Industry and Information Technology of the People’s Republic of China, Beijing 100081, China
  • 3Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education of the People’s Republic of China, Beijing 100081, China
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    Figures & Tables(8)
    OAM state measurement of single mode vortex beams through diffraction gratings. (a) Double-slit diffraction[51]; (b) Triangular aperture diffraction[53]; (c) Annular triangle aperture diffraction[56]; (d) Gradually-changing-period diffraction element[58]; (e) Annular grating[59]
    OAM spectrum measurement through gray-scale algorithm associated with a Dammann vortex grating[69]
    OAM mode sorter based on M-Z interferometer. (a) Setup; (b) Three-stage cascaded OAM mode sorter[71]
    OAM mode sorter from Cartesian to log-polar coordinate transformation. (a) Coordinate transforming grating; (b) Phase-correcting grating; (c) Modeled and observed intensity profiles at before the transforming optical grating, just after the phase-correcting grating, and the modeled and observed images in the detector plane[76]
    Optimized coordinate transformation based OAM mode sorter. (a) Fan-out scheme[77]; (b) Radial varying phase scheme[79]; (c) Spiral transformation scheme[80]
    [in Chinese]
    Other approaches of OAM spectrum measurement. (a) Rotational Doppler shift scheme[105]; (b) Time mapping scheme[107]; (c) Single-pixel imaging scheme[115]; (d) High-order intensity moments scheme[122]
    Universal OAM spectrum analyzer based on interference[124]. (a) Concept; (b) Intensity profiles of muli-ring optical vortices to be measured; (c) Corresponding OAM measurement results of (b)
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    Shiyao Fu, Lei Huang, Yanlai Lv, Chunqing Gao. Advances on the measurement of orbital angular momentum spectra for laser beams (Invited)[J]. Infrared and Laser Engineering, 2021, 50(9): 20210145

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    Paper Information

    Category: Special issue-Manipulation on optical vortex and its sensing application

    Received: Mar. 8, 2021

    Accepted: --

    Published Online: Oct. 28, 2021

    The Author Email:

    DOI:10.3788/IRLA20210145

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