Abstract

The rotational Doppler effect (RDE) provides an efficient way to measure rotational frequency using an optical vortex beam. Crucially, most research based on the RDE just involves a spinning object or a spinning object coupled with a longitudinal velocity along the beam propagation. We analyze the interaction mechanism between optical orbital angular momentum and a spinning object with circular procession and experimentally demonstrate simultaneous measurements of two rotational frequencies. This technique broadens application of the RDE in optical metrology and remote detection of targets with micro-motions.

© 2022 Optica Publishing Group

Free-space remote detection of a spinning object using the combined vortex beam

Tao Yu, Hui Xia, Qiao Xie, Guangwei Qin, Yuefeng Zhao, and Wenke Xie
Opt. Express 30(22) 39294-39308 (2022)

Fragmental optical vortex for the detection of rotating object based on the rotational Doppler effect

Song Qiu, You Ding, Tong Liu, Zhengliang Liu, Hao Wu, and Yuan Ren
Opt. Express 30(26) 47350-47360 (2022)

Detection of a spinning object using a superimposed optical vortex array

You Ding, Xiangyang Zhu, Tong Liu, Zhengliang Liu, Song Qiu, Xiaocen Chen, and Yuan Ren
Opt. Express 31(16) 25889-25899 (2023)

Locating the center of rotation of a planar object using an optical vortex

You Ding, Tong Liu, Song Qiu, Zhengliang Liu, Qimeng Sha, and Yuan Ren
Appl. Opt. 61(14) 3919-3923 (2022)

Direction-discriminated rotational Doppler velocimetry with circularly polarized vortex beams

Zhenyu Wan, Liang Fang, and Jian Wang
Opt. Lett. 47(5) 1021-1024 (2022)