Shiyao Fu and Tonglu Wang and Zheyuan Zhang and Yanwang Zhai and Chunqing Gao


“Bessel-Gauss beams carrying orbital angular momentum are widely known for
their non-diffractive or self-reconstructing performance, and have been applied in lots of
domains. Here we demonstrate that, by illuminating a rotating object with high-order Bessel-
Gauss beams, a frequency shift proportional to the rotating speed and the topological charge
is observed. Moreover, the frequency shift is still present once an obstacle exists in the path,
in spite of the decreasing of received signals. Our work indicates the feasibility of detecting
rotating objects free of obstructions, and has potential as obstruction-immune rotation sensors
in engine monitoring, aerological sounding, and so on.”

Link to Publications Page

Publication: Optics Express

Issue/Year/DOI: Optics Express Volume 25, Issue 17 pp. 20098-20108 (2017)
DOI: 10.1364/oe.25.020098