Measurement of Distance by the Maximum Frequency of the Interference Signal with Harmonic Deviation of the Wavelength of the Self-Mixing Laser

被引：0
|
作者：
Skripal, A. V. [1 ]
Dobdin, S. Yu. [1 ]
Inkin, M. G. [1 ]
Dzhafarov, A. V. [1 ]
机构：
[1] Saratov Natl Res State Univ, Saratov, Russia
来源：
TECHNICAL PHYSICS | 2024年 / 69卷 / 05期
关键词：
laser interferometry; self-mixing laser; semiconductor laser; laser radiation modulation; distance measurement; signal spectral analysis;
D O I：
10.1134/S1063784224040406
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A method is proposed for measuring absolute distances from the low-frequency spectrum of the interference signal of a frequency-modulated laser diode. The method of modulation of the self-mixing laser signal according to the harmonic law is used, in the spectrum of which a wide range of frequency components is observed. The connection between the maximum frequency of change of the interference signal and the absolute distance to the reflector is shown. A linear dependence of the frequency corresponding to the inflection region of the decay envelope of the interference signal spectrum on the distance is shown, which can be used to implement a non-contact distance measurement method with harmonic modulation of the self-mixing laser supply current.
引用
收藏
页码：1400 / 1406
页数：7
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