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Development of a High-Resolution All-Fiber Homodyne Laser Doppler Vibrometer

Based on the homodyne detection, a compact and cost-effective all-fiber laser Doppler vibrometer (LDV) with high resolution is presented. For the signal processing, the discrimination algorithm combined with the nonorthogonal correction is applied. The algorithm corrects the quadrature imbalance and...

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Detalles Bibliográficos
Autores principales: Shang, Jianhua, He, Yan, Wang, Qi, Li, Yilun, Ren, Lihong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7602043/
https://www.ncbi.nlm.nih.gov/pubmed/33066344
http://dx.doi.org/10.3390/s20205801
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author Shang, Jianhua
He, Yan
Wang, Qi
Li, Yilun
Ren, Lihong
author_facet Shang, Jianhua
He, Yan
Wang, Qi
Li, Yilun
Ren, Lihong
author_sort Shang, Jianhua
collection PubMed
description Based on the homodyne detection, a compact and cost-effective all-fiber laser Doppler vibrometer (LDV) with high resolution is presented. For the signal processing, the discrimination algorithm combined with the nonorthogonal correction is applied. The algorithm corrects the quadrature imbalance and other nonlinearity. In the calibration experiment, with the glass pasted on a piezoceramic transducer (PZT), the velocity resolution of 62 nm/s at 4 kHz and displacement resolution of 2.468 pm are achieved. For the LDV-based acousto-optic communication, the minimum detectable sound pressure level (SPL) reached 0.12 Pa under the hydrostatic air-water surface. The results demonstrate that the designed homodyne LDV has a low system background noise and can offer high precision in the vibration measurement.
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spelling pubmed-76020432020-11-01 Development of a High-Resolution All-Fiber Homodyne Laser Doppler Vibrometer Shang, Jianhua He, Yan Wang, Qi Li, Yilun Ren, Lihong Sensors (Basel) Letter Based on the homodyne detection, a compact and cost-effective all-fiber laser Doppler vibrometer (LDV) with high resolution is presented. For the signal processing, the discrimination algorithm combined with the nonorthogonal correction is applied. The algorithm corrects the quadrature imbalance and other nonlinearity. In the calibration experiment, with the glass pasted on a piezoceramic transducer (PZT), the velocity resolution of 62 nm/s at 4 kHz and displacement resolution of 2.468 pm are achieved. For the LDV-based acousto-optic communication, the minimum detectable sound pressure level (SPL) reached 0.12 Pa under the hydrostatic air-water surface. The results demonstrate that the designed homodyne LDV has a low system background noise and can offer high precision in the vibration measurement. MDPI 2020-10-14 /pmc/articles/PMC7602043/ /pubmed/33066344 http://dx.doi.org/10.3390/s20205801 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Letter
Shang, Jianhua
He, Yan
Wang, Qi
Li, Yilun
Ren, Lihong
Development of a High-Resolution All-Fiber Homodyne Laser Doppler Vibrometer
title Development of a High-Resolution All-Fiber Homodyne Laser Doppler Vibrometer
title_full Development of a High-Resolution All-Fiber Homodyne Laser Doppler Vibrometer
title_fullStr Development of a High-Resolution All-Fiber Homodyne Laser Doppler Vibrometer
title_full_unstemmed Development of a High-Resolution All-Fiber Homodyne Laser Doppler Vibrometer
title_short Development of a High-Resolution All-Fiber Homodyne Laser Doppler Vibrometer
title_sort development of a high-resolution all-fiber homodyne laser doppler vibrometer
topic Letter
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7602043/
https://www.ncbi.nlm.nih.gov/pubmed/33066344
http://dx.doi.org/10.3390/s20205801
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