Revisit of azimuthal doppler shift for transverse flow measurement by using an optical vortex beam

Miki Kitazawa; Haruhiko Himura; Kyoko Kitamura

doi:10.1117/12.2573531

15 June 2020 Revisit of azimuthal doppler shift for transverse flow measurement by using an optical vortex beam

Miki Kitazawa, Haruhiko Himura, Kyoko Kitamura

Proceedings Volume 11522, Optical Manipulation and Structured Materials Conference 2020; 1152207 (2020) https://doi.org/10.1117/12.2573531
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

We revisit the principle of transverse ion flow V measurement by using an optical vortex beam (OVB). We first derive azimuthal Doppler shift with conservations of momentum and energy of the atom that is excited by the OVB, unlike the original paper [L. Allen et al., Optics Communications 112, 141 (1994).]. Then, we consider the feasibility of plasma flow velocity measurement which measure the Doppler shift with using a surface-processed photonic-crystal laser. It shows that the beam radius in a typical case is required to be less than approximately 60 μm for V~10⁵ m/s and topological charge l = 2.

Citation Download Citation

Miki Kitazawa, Haruhiko Himura, and Kyoko Kitamura "Revisit of azimuthal doppler shift for transverse flow measurement by using an optical vortex beam", Proc. SPIE 11522, Optical Manipulation and Structured Materials Conference 2020, 1152207 (15 June 2020); https://doi.org/10.1117/12.2573531

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