Upconversion Photonic Doppler Velocimetry Based on Stimulated Brillouin Scattering

Optical up-conversion photonic Doppler velocimetry (PDV) based on stimulated Brillouin Scattering (SBS) with an all-fiber link structure is proposed in this article. Because SBS limits the laser power transmitted by a fiber over long distances, the probe does not have enough outgoing light to reach...

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Bibliographic Details
Published in:Photonics 2024-02, Vol.11 (2), p.177
Main Authors: Chen, Long, Liu, Cangli, Ma, Heli, Tang, Longhuang, Jia, Xing, Tao, Tianjiong, Liu, Shenggang, Chen, Yongchao, Wang, Xiang, Wu, Jian, Li, Chengjun, Weng, Jidong
Format: Article
Language:English
Subjects:
Acoustics
Doppler effect
Efficiency
Experiments
Fourier transforms
heterodyne
Interference fringes
Interferometry
Lasers
Low speed
Measurement techniques
photonic Doppler velocimetry
Photonics
Scattering
shock wave physics
Shock waves
stimulated Brillouin scattering
Upconversion
Velocimetry
Velocity
Velocity measurement
Wave physics
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Summary:Optical up-conversion photonic Doppler velocimetry (PDV) based on stimulated Brillouin Scattering (SBS) with an all-fiber link structure is proposed in this article. Because SBS limits the laser power transmitted by a fiber over long distances, the probe does not have enough outgoing light to reach the measured surface and cannot receive the signal light. Traditionally, SBS is avoided, but it is a phase-conjugated light and shifts down relative to the source light, so it can be used as a reference light in the laser interference structure to achieve up-conversion heterodyne velocimetry. Compared with general homodyne velocimetry (DPS), SBS-PDV naturally upconverts and has more interference fringes and higher resolution at low-speed measurement. In the gas multiple reflection impact compression experiment, the velocity measurement results of SBS-PDV and dual-laser heterodyne Velocimetry (DLHV) are basically consistent, and the accuracy is better than 0.8%. Due to its coaxial heterodyne optical path, this kind of photonic Doppler velocimetry is suitable for low-velocity and long-distance practical applications in the field of shock wave physics.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics11020177