Compact and reciprocal probe-signal-integrated rotational Doppler velocimetry with fiber-sculpted light

Zhenyu Wan; Ziyi Tang; Xi Zhang; Miles J. Padgett; Jian Wang

doi:10.1038/s41377-025-01747-8

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Compact and reciprocal probe-signal-integrated rotational Doppler velocimetry with fiber-sculpted light

Original Articles

- Compact and reciprocal probe-signal-integrated rotational Doppler velocimetry with fiber-sculpted light
- Light: Science & Applications Vol. 14, Issue 4, Pages: 959-969(2025)
- 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.School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
- Author bio：
  
  Jian Wang (jwang@hust.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-01747-8
  CLC：
- Received：18 September 2024，
  
  Revised：02 January 2025，
  
  Accepted：2025-01-04，
  
  Published Online：17 February 2025，
  
  Published：30 April 2025
- Accepted：
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Wan, Z. Y. et al. Compact and reciprocal probe-signal-integrated rotational Doppler velocimetry with fiber-sculpted light. Light: Science & Applications, 14, 959-969 (2025).
DOI：

Wan, Z. Y. et al. Compact and reciprocal probe-signal-integrated rotational Doppler velocimetry with fiber-sculpted light. Light: Science & Applications, 14, 959-969 (2025). DOI： 10.1038/s41377-025-01747-8.

摘要

Abstract

In recent years

with the clarification of the mechanism of the rotational Doppler effect (RDE)

there has attracted extensive attention to its development of applications

especially in the detection of the angular velocity of rotating objects. On the other hand

optical fiber technology is widely applied in laser velocimetry from beam delivery to scattered light collection

aiding the miniaturization of instruments. Here we report the first all-fiber rotational Doppler velocimetry (AF-RDV) with a single probe based on a fabricated mode-sculpted fiber-optic element. The constructed AF-RDV can be operated in two reciprocal schemes wherein exchanging the illuminating mode and detected mode. Using this

we experimentally demonstrate the mode-changing dependent nature of the RDE. Particularly

the results suggest that the rotational Doppler shift can be observed by mode-filtering the scattered signal even with a non-twisted probe light. We also show the achromatic property of the RDE by scanning the incident wavelength

enabling the AF-RDV within an ultra-broadband operation range. The AF-RDV exhibits favorable performance for detecting spinning rough surfaces. It may provide an exciting new practical sensing instrument with significant prospects for monitoring angular motion in both research and industry.

关键词

Keywords

references

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