Acceleration measurement by spectrum of interference signal of self-mixing laser

An. V. Skripal; S. Yu. Dobdin; A. V. Dzhafarov; K. A. Sadchikova

doi:10.1117/12.2559037

9 April 2020 Acceleration measurement by spectrum of interference signal of self-mixing laser

An. V. Skripal, S. Yu. Dobdin, A. V. Dzhafarov, K. A. Sadchikova

Proceedings Volume 11458, Saratov Fall Meeting 2019: Laser Physics, Photonic Technologies, and Molecular Modeling; 114580D (2020) https://doi.org/10.1117/12.2559037
Event: Saratov Fall Meeting 2019: VII International Symposium on Optics and Biophotonics, 2019, Saratov, Russian Federation

Abstract

A method for measuring acceleration based on the use of the fast-discrete Fourier transform algorithm is proposed. The simulation of the spectrum of the self-mixing signal at the uniformly accelerated motion of the reflector is carried out. The relationship of low-frequency and high-frequency components of the self-mixing signal spectrum with the object acceleration value is shown. The measurement of uniformly accelerated motion of an object on the spectrum of a self-mixing signal is experimentally realized. The accelerated motion of the reflector was carried out using a signal generator built into the laboratory station of the Ni ELVIS virtual instruments. The results of measuring the motion of piezoceramics with the acceleration given by the quadratic law of voltage change on it are presented. The results of calculation of acceleration on the spectrum of the self-mixing signal for 26 μm/s² are presented. The resolution of the proposed method was estimated by measuring the frequencies of neighboring spectral components and amounted to 500 nm/s².

Citation Download Citation

An. V. Skripal, S. Yu. Dobdin, A. V. Dzhafarov, and K. A. Sadchikova "Acceleration measurement by spectrum of interference signal of self-mixing laser", Proc. SPIE 11458, Saratov Fall Meeting 2019: Laser Physics, Photonic Technologies, and Molecular Modeling, 114580D (9 April 2020); https://doi.org/10.1117/12.2559037

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