Chinese Physics B, Volume. 29, Issue 10, (2020)

Measuring orbital angular momentum of acoustic vortices based on Fraunhofer’s diffraction

Chao-Fan Gong... Jing-Jing Li, Kai Guo, Hong-Ping Zhou† and Zhong-Yi Guo |Show fewer author(s)
Author Affiliations
  • School of Computer and Information, Hefei University of Technology, Hefei 230009, China
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    Figures & Tables(5)
    Geometry and notation of generic MPI consisting of N points, uniformly distributed over a circle of radius a. The points are indicated by white dots and the angular coordinate of the n-th point is αn = 2π nN−1.
    Simulated far-field intensity patterns behind multipoint interferometer of N points illuminated by AV beam with topological charge l.
    Simulated far-field intensity patterns behind MPI with N points illuminated by AV beam with topological charge l, with patterns for l = |m| and l = – |m| being mirrored in x axis.
    (a) Displacement of MPI with respect to propagation axis of impinging beam with d for N = 6, and (b) MPI axis tilted with respect to the propagation axis of the impinging beam with θ for N = 6.
    Far-field intensity patterns behind a multipoint interferometer for N = 5 illuminated by AV with l = 2 displacement and tilt of the multipoint interferometer with respect to the propagation axis of impinging beam with (a) d = 0 mm with θ from 0° to 20°, (b) d = 0.3 mm with θ from 0° to 20°, (c) d = 0.6 mm with θ from 0° to 20°, and (d) d = 0.9 mm with θ from 0 ° to 20°. A displacement and a tilt of the multipoint interferometer with respect to the propagation axis of the impinging beam result in distorted and blurred interference patterns.
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    Chao-Fan Gong, Jing-Jing Li, Kai Guo, Hong-Ping Zhou, Zhong-Yi Guo. Measuring orbital angular momentum of acoustic vortices based on Fraunhofer’s diffraction[J]. Chinese Physics B, 2020, 29(10):

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    Paper Information

    Received: Feb. 27, 2020

    Accepted: --

    Published Online: Apr. 21, 2021

    The Author Email: Zhou Hong-Ping (guozhongyi@hfut.edu.cn)

    DOI:10.1088/1674-1056/ab9c11

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