All-Fiber Configuration Laser Self-Mixing Doppler Velocimeter Based on Distributed Feedback Fiber Laser

Wu, Shuang; Wang, Dehui; Xiang, Rong; Zhou, Jian; Ma, Ying-Rui; Gui, Huaqiao; Liu, Jianguo; Wang, Huanqin; Lü, Liang; Yu, Benli

doi:10.3390/s16081179

Cited by 19 publications

(4 citation statements)

References 41 publications

(39 reference statements)

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“…So-called self-mixing interference refers to the fact that a part of the reflected or scattered light feedbacks into the laser cavity and interferes with the original light, resulting in changes in laser output characteristics. Compared with traditional interferometry used to measure the motion of an external target, selfmixing interferometry has been applied in many sensing fields, such as distance [6][7][8][9], angle [10][11][12], displacement [13][14][15][16], velocity [17][18][19], and other fields [20][21][22][23], due to its inherent advantages, such as its simple and compact structure, self-alignment, and low cost.…”

Section: Introductionmentioning

confidence: 99%

High-Precision Laser Self-Mixing Displacement Sensor Based on Orthogonal Signal Phase Multiplication Technique

et al. 2023

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A new signal processing method named orthogonal signal phase multiplication (OSPM) is proposed, which is used to improve the precision of vibration measurement in a phase-modulating self-mixing interferometer (SMI). The modulated signal is acquired by an electro-optic modulator, which is placed in the external cavity. Higher measurement precision is realized by performing the phase multiplication algorithm on the orthogonal signals extracted from the harmonic components of the signal spectrum. Theoretically, the displacement reconstruction precision of OSPM is higher than that of conventional modulation methods, and it can be continuously improved by increasing the multiplication times. The feasibility and performance of the proposed method are verified by simulated signals and confirmed by experiments; the absolute error is less than 11 nm, and relative error is less than 0.75%, within the amplitude range from 661 nm to 2013 nm. This method does not involve additional optical elements, and its effectiveness meet the requirements for real-time high-precision measurements.

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Section: Introductionmentioning

confidence: 99%

High-Precision Laser Self-Mixing Displacement Sensor Based on Orthogonal Signal Phase Multiplication Technique

et al. 2023

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“…However, various applications based on lasers with EOF have been developed. Typical examples are self-mixing interferometry (SMI) or optical feedback interferometry (OFI), which are emerging and promising non-contact sensing techniques using the self-mixing effect that occur when a fraction of light is back-reflected or back-scattered by an external target and re-enters the laser's inside cavity [4][5][6][7][8][9]. In this case, the steadystate intensity of the lasing light is modulated by a varying external optical feedback phase, which is a remarkably universal phenomenon occurring in lasers regardless of type.…”

Section: Introductionmentioning

confidence: 99%

Sensing by Dynamics of Lasers with External Optical Feedback: A Review

Liu

Jiang

2022

Photonics

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External optical feedback (EOF) has great impacts on the properties of lasers. It influences the stable operation of lasers. However, various applications based on lasers with EOF have been developed. One typical example is self-mixing interferometry technology, where modulated steady-state laser intensity is utilized for sensing and measurement. Other works show that laser dynamics can also be used for sensing, and the laser in this case is more sensitive to EOF. This paper reviews the sensing technology that uses the dynamics of lasers with EOF. We firstly introduce the basic operating principles of a laser with EOF and discuss the noise properties of and intensity modification in lasers induced by EOF. Then, sensing applications using laser dynamics are categorized and presented, including sensing by frequency-shifted optical feedback, relaxation oscillation frequency, and dynamics with self-mixing interferometry signals and laser optical chaos. Lastly, we present an analysis of the transient response waveform and spectrum of a laser with EOF, showing its potential for sensing.

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“…Owing to the rapid development of fiber technology, using fiber-optic-type devices, all-fiber-optic Doppler measurement systems can be constructed, which are more compact, versatile, and convenient to use in various environments. [8][9][10][11][12][13] All laser Doppler measurement systems are based on the interference of light. All-fiber-optic laser Doppler measurement systems can be classified into two types of interferometric configurations according to the detection method used: homodyne and heterodyne interferometries.…”

Section: Introductionmentioning

confidence: 99%

Nonzero-drift differential all-fiber-optic heterodyne Doppler measurement system

Zhang

Wang

et al. 2019

Opt. Eng.

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To eliminate the serious detrimental effects caused by frequency drifts of acousto-optic frequency shifters (AOFSs) in conventional all-fiber-optic heterodyne Doppler measurement systems, a differential allfiber-optic heterodyne configuration is proposed. By delicate arrangement of the fiber-optic path and using only one AOFS, zero drift, which commonly occurs in conventional systems, is eliminated. Based on the proposed configuration, a differential all-fiber-optic heterodyne Doppler measurement system has been built. Using a piezoelectric ceramic oscillator as the moving object, it has been verified that the proposed system is able to eliminate zero drift, and the displacement and velocity measurement accuracies reach 0.775 μm and 0.009 mm∕s, respectively. It has been shown that the differential all-fiber-optic heterodyne Doppler measurement system can achieve good performance in both displacement and velocity measurements, even in a harsh environment with drastic temperature variation.

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All-Fiber Configuration Laser Self-Mixing Doppler Velocimeter Based on Distributed Feedback Fiber Laser

Cited by 19 publications

References 41 publications

High-Precision Laser Self-Mixing Displacement Sensor Based on Orthogonal Signal Phase Multiplication Technique

High-Precision Laser Self-Mixing Displacement Sensor Based on Orthogonal Signal Phase Multiplication Technique

Sensing by Dynamics of Lasers with External Optical Feedback: A Review

Nonzero-drift differential all-fiber-optic heterodyne Doppler measurement system

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