Infrared and Laser Engineering, Volume. 50, Issue 9, 20210145(2021)
Advances on the measurement of orbital angular momentum spectra for laser beams (Invited)
Fig. 2. OAM spectrum measurement through gray-scale algorithm associated with a Dammann vortex grating[69]
Fig. 3. OAM mode sorter based on M-Z interferometer. (a) Setup; (b) Three-stage cascaded OAM mode sorter[71]
Fig. 4. 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]
Fig. 7. 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
Category: Special issue-Manipulation on optical vortex and its sensing application
Received: Mar. 8, 2021
Accepted: --
Published Online: Oct. 28, 2021
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