Abstract

In this paper, the self-mixing interference subject to weak optical feedback has been used to measure the damping vibration. By analyzing the spectrum of the signal, the damping coefficient can be extracted precisely from the nth-order Bessel functions, which are determined by the dominant harmonic order of the frequency spectrum. Theoretical derivation and signal processing are presented. Four kinds of vibrating targets with different damping coefficients are measured. Experimental results show that standard deviation and root mean square error of data are less than 0.2 and 0.1, respectively, which means fitted values are stable as well as having a very high fitting precision.

© 2020 Optical Society of America

Fast estimation method of feedback factor based on the derivative of the self-mixing signal

Jin-Hyok Kim, Chol-Hyon Kim, Dong-Kuk Kim, Hyon-Song Ri, and Gwan-Hyok Jo
Appl. Opt. 59(22) 6689-6693 (2020)

Vibration measurement technology based on the reverse point recognition algorithm for laser self-mixing interference

Xiangyu Cui, Linna Cai, Hangyu Yue, Taiji Dong, Wendi Yan, Yang Song, Chunsheng Li, and Bingkun Gao
Appl. Opt. 60(34) 10736-10742 (2021)

Evaluation method for the optical feedback factor and linewidth enhancement factor using phase discontinuities in self-mixing interferometry signals

Chol-Yong Ri, Chol-Su Kim, Guk-Chol Ri, Jong-Chol Kang, Chol-Min Pak, and Jin-Myong O
Appl. Opt. 59(3) 687-693 (2020)

Rotation velocity measurement based on a self-mixing grating interferometer

Taiji Dong, Bingkun Gao, Chen Qing, and Yuhan Geng
Appl. Opt. 59(20) 5930-5936 (2020)

Signal enhancement method based on a Fabry–Perot etalon for a self-mixing laser diode

Shiwei Liu, Hongwei Liang, Peng Chen, Lingling Kan, and Chunlei Jiang
Appl. Opt. 60(36) 10996-11000 (2021)