Remote Measurement of the Angular Velocity Vector Based on Vectorial Doppler Effect Using Air-Core Optical Fiber

Zhenyu Wan; Yize Liang; Xi Zhang; Ziyi Tang; Liang Fang; Zelin Ma; Siddharth Ramachandran; Jian Wang

doi:10.34133/2022/9839502

Remote Measurement of the Angular Velocity Vector Based on Vectorial Doppler Effect Using Air-Core Optical Fiber

Research (Wash D C). 2022 Sep 2:2022:9839502. doi: 10.34133/2022/9839502. eCollection 2022.

Authors

Zhenyu Wan^{1

2}, Yize Liang^{1

2}, Xi Zhang^{1

2}, Ziyi Tang^{1

2}, Liang Fang^{1

2}, Zelin Ma³, Siddharth Ramachandran³, Jian Wang^{1

2}

Affiliations

¹ Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074 Hubei, China.
² Optics Valley Laboratory, Wuhan, 430074 Hubei, China.
³ Boston University, 8 St. Mary's St., Boston 02215, USA.

Abstract

Rotational Doppler effect has made tremendous development in both theoretical and applied research over the last decade. Different from the inertial thinking of focusing on the scalar field dominated by helical phase light, we have revealed a vectorial Doppler effect in our previous work, which is based on the spatially variant polarized light fields to simultaneously acquire the speed and direction of a target. Here, further, we propose a method to construct a flexible and robust velocimeter based on that novel effect by employing an air-core fiber with kilometer-length scale for remotely measuring the vectorial information of angular velocity in situ. In addition, we experimentally substantiate that the measurement system still has commendable accuracy in determining the direction of movement even when the air-core fiber is interfered by the external environment. The demonstrations prove the potential of vectorial Doppler effect in practical scenarios and remote measurements.