Study on the dual-channel displacement measurement method using linearly tuned laser self-mixing interference

被引：0
|
作者：
Fan Y. [1 ]
Kou K. [1 ]
Wang X. [1 ]
Jiao M. [1 ]
机构：
[1] School of Mechanical and Precision Instrumental Engineering, Xi′an University of Technology, Xi′an
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2023年 / 44卷 / 10期
关键词：
all-phase spectral analysis; laser self-mixing interference; two-channel displacement measurement;
D O I：
10.19650/j.cnki.cjsi.J2311698
中图分类号：
学科分类号：
摘要：
To meet some special requirements of 2D displacement measurement in engineering or improve the efficiency of displacement measurement, a simple and compact dual-channel displacement measurement system utilizing laser self-mixing interference is established. Firstly, mathematical equations of the self-mixing interference system are given, which are based on the three-mirror Fabry-Perot cavity model. Then, under the condition of weak feedback, linear current modulation is applied. According to the linear relationship between the frequency of the self-mixing signal and the distance between the external object, when the distance between the two objects and the laser is different, the frequency domain will present two independent spectral peaks, and the phase is solved respectively. Therefore, the self-mixing dual-channel displacement measurement is realized. Then, the dual-channel self-mixing signal is generated by numerical simulation. The phase of two spectral peaks of the self-mixing signal is extracted according to the all-phase spectrum analysis technique, and the displacement curves of the two objects are reconstructed accordingly. Finally, an experiment system is established, the dual-channel displacement measurement experiments are carried out, and the measurement results are exhibited subsequently. The experimental results show that the system can completely distinguish two moving objects, and the relative error of displacement measurement is better than 8. 42% . The linear frequency modulated laser self-mixing interferometry can realize the dual-channel displacement measurement of arbitrary motion, and the number of measuring channels can be further increased by more beam splitting. © 2023 Science Press. All rights reserved.
引用
收藏
页码：22 / 29
页数：7
相关论文
共 20 条
  • [1] DONATI S., Developing self-mixing interferometry for instrumentation and measurements [ J ], Laser & Photonics Reviews, 6, 3, pp. 393-417, (2012)
  • [2] KOU K, LI X F, LI L, Et al., Injected current reshaping in distance measurement by laser self-mixing interferometry [J], Applied Optics, 53, 27, pp. 6280-6286, (2014)
  • [3] XIANG R, WANG C, LU L., Laser Doppler velocimeter using the self-mixing effect of a fiber ring laser with ultra-narrow linewidth, Journal of Optics, 48, 3, pp. 384-392, (2019)
  • [4] JIANG CH L, LI CH W, YIN SH X, Et al., Multiple self-mixing interferometry algorithm based on phase modulation for vibration measurement [ J ], Optical and Quantum Electronics, (2017)
  • [5] OTSUKA K, ABE K, SANO N, Et al., Two-channel self-mixing laser Doppler measurement with carrier-frequency-division multiplexing [ J ], Applied Optics, 44, 9, pp. 1709-1714, (2005)
  • [6] CHEN P, LIU Y W, GAO B K, Et al., Modeling and experimental verification of laser self-mixing interference phenomenon with the structure of two-external-cavity feedback [ J ], Optics Communications, 410, pp. 690-693, (2018)
  • [7] LU L, ZHANG W H, YANG B, Et al., Dual-channel self-mixing vibration measurement system in a linear cavity fiber laser [ J ], IEEE Sensors Journal, 13, 11, pp. 4387-4392, (2013)
  • [8] CUI X Y, LIU Y W, CHEN P, Et al., Measuring two vibrations using dual-external-cavity structure in a self-mixing system [ J ], Optics and Lasers in Engineering, (2021)
  • [9] GAO B K, LIU Y W, JIANG C L, Et al., Time-and frequency-domain verification of laser self-mixing interference with two-external-cavity feedback [ J ], Optical Engineering, (2018)
  • [10] HUAN H, GUO K L, ZHANG Y, Et al., Phase-extracting method of laser self-mixing interference signal with two feedback external cavity [ J ], Laser & Optoelectronics Progress, 53, 6, pp. 165-172, (2016)
12