Cargando…

Large-Dynamic-Range and High-Stability Phase Demodulation Technology for Fiber-Optic Michelson Interferometric Sensors

A large-dynamic-range and high-stability phase demodulation technology for fiber-optic Michelson interferometric sensors is proposed. This technology utilizes two output signals from a 2 × 2 fiber-optic coupler, the interferometric phase difference of which is π. A linear-fitting trigonometric-ident...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhang, Wanjin, Lu, Ping, Qu, Zhiyuan, Zhang, Jiangshan, Wu, Qiang, Liu, Deming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9002562/
https://www.ncbi.nlm.nih.gov/pubmed/35408103
http://dx.doi.org/10.3390/s22072488
_version_ 1784685920591544320
author Zhang, Wanjin
Lu, Ping
Qu, Zhiyuan
Zhang, Jiangshan
Wu, Qiang
Liu, Deming
author_facet Zhang, Wanjin
Lu, Ping
Qu, Zhiyuan
Zhang, Jiangshan
Wu, Qiang
Liu, Deming
author_sort Zhang, Wanjin
collection PubMed
description A large-dynamic-range and high-stability phase demodulation technology for fiber-optic Michelson interferometric sensors is proposed. This technology utilizes two output signals from a 2 × 2 fiber-optic coupler, the interferometric phase difference of which is π. A linear-fitting trigonometric-identity-transformation differential cross-multiplication (LF-TIT-DCM) algorithm is used to interrogate the phase signal from the two output signals from the coupler. The interferometric phase differences from the two output signals from the 2 × 2 fiber-optic couplers with different coupling ratios are all equal to π, which ensures that the LF-TIT-DCM algorithm can be applied perfectly. A fiber-optic Michelson interferometric acoustic sensor is fabricated, and an acoustic signal testing system is built to prove the proposed phase demodulation technology. Experimental results show that excellent linearity is observed from 0.033 rad to 3.2 rad. Moreover, the influence of laser wavelength and optical power is researched, and variation below 0.47 dB is observed at different sound pressure levels (SPLs). Long-term stability over thirty minutes is tested, and fluctuation is less than 0.36 dB. The proposed phase demodulation technology obtains large dynamic range and high stability at rather low cost.
format Online
Article
Text
id pubmed-9002562
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-90025622022-04-13 Large-Dynamic-Range and High-Stability Phase Demodulation Technology for Fiber-Optic Michelson Interferometric Sensors Zhang, Wanjin Lu, Ping Qu, Zhiyuan Zhang, Jiangshan Wu, Qiang Liu, Deming Sensors (Basel) Article A large-dynamic-range and high-stability phase demodulation technology for fiber-optic Michelson interferometric sensors is proposed. This technology utilizes two output signals from a 2 × 2 fiber-optic coupler, the interferometric phase difference of which is π. A linear-fitting trigonometric-identity-transformation differential cross-multiplication (LF-TIT-DCM) algorithm is used to interrogate the phase signal from the two output signals from the coupler. The interferometric phase differences from the two output signals from the 2 × 2 fiber-optic couplers with different coupling ratios are all equal to π, which ensures that the LF-TIT-DCM algorithm can be applied perfectly. A fiber-optic Michelson interferometric acoustic sensor is fabricated, and an acoustic signal testing system is built to prove the proposed phase demodulation technology. Experimental results show that excellent linearity is observed from 0.033 rad to 3.2 rad. Moreover, the influence of laser wavelength and optical power is researched, and variation below 0.47 dB is observed at different sound pressure levels (SPLs). Long-term stability over thirty minutes is tested, and fluctuation is less than 0.36 dB. The proposed phase demodulation technology obtains large dynamic range and high stability at rather low cost. MDPI 2022-03-24 /pmc/articles/PMC9002562/ /pubmed/35408103 http://dx.doi.org/10.3390/s22072488 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Wanjin
Lu, Ping
Qu, Zhiyuan
Zhang, Jiangshan
Wu, Qiang
Liu, Deming
Large-Dynamic-Range and High-Stability Phase Demodulation Technology for Fiber-Optic Michelson Interferometric Sensors
title Large-Dynamic-Range and High-Stability Phase Demodulation Technology for Fiber-Optic Michelson Interferometric Sensors
title_full Large-Dynamic-Range and High-Stability Phase Demodulation Technology for Fiber-Optic Michelson Interferometric Sensors
title_fullStr Large-Dynamic-Range and High-Stability Phase Demodulation Technology for Fiber-Optic Michelson Interferometric Sensors
title_full_unstemmed Large-Dynamic-Range and High-Stability Phase Demodulation Technology for Fiber-Optic Michelson Interferometric Sensors
title_short Large-Dynamic-Range and High-Stability Phase Demodulation Technology for Fiber-Optic Michelson Interferometric Sensors
title_sort large-dynamic-range and high-stability phase demodulation technology for fiber-optic michelson interferometric sensors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9002562/
https://www.ncbi.nlm.nih.gov/pubmed/35408103
http://dx.doi.org/10.3390/s22072488
work_keys_str_mv AT zhangwanjin largedynamicrangeandhighstabilityphasedemodulationtechnologyforfiberopticmichelsoninterferometricsensors
AT luping largedynamicrangeandhighstabilityphasedemodulationtechnologyforfiberopticmichelsoninterferometricsensors
AT quzhiyuan largedynamicrangeandhighstabilityphasedemodulationtechnologyforfiberopticmichelsoninterferometricsensors
AT zhangjiangshan largedynamicrangeandhighstabilityphasedemodulationtechnologyforfiberopticmichelsoninterferometricsensors
AT wuqiang largedynamicrangeandhighstabilityphasedemodulationtechnologyforfiberopticmichelsoninterferometricsensors
AT liudeming largedynamicrangeandhighstabilityphasedemodulationtechnologyforfiberopticmichelsoninterferometricsensors