Highly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber

Abstract A highly sensitive fiber-optic accelerometer based on detecting the power output of resonances from the core dip is demonstrated. The sensing probe comprises a compact structure, hereby a short section of specific core (with a significant core dip) fiber stub containing a straight fiber Bra...

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Autores principales:	Qiangzhou Rong, Tuan Guo, Weijia Bao, Zhihua Shao, Gang-Ding Peng, Xueguang Qiao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3fa7da5c28c143cfbf034084d89e727f
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spelling	oai:doaj.org-article:3fa7da5c28c143cfbf034084d89e727f2021-12-02T15:05:31ZHighly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber10.1038/s41598-017-12322-62045-2322https://doaj.org/article/3fa7da5c28c143cfbf034084d89e727f2017-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-12322-6https://doaj.org/toc/2045-2322Abstract A highly sensitive fiber-optic accelerometer based on detecting the power output of resonances from the core dip is demonstrated. The sensing probe comprises a compact structure, hereby a short section of specific core (with a significant core dip) fiber stub containing a straight fiber Bragg grating is spliced to another single-mode fiber via a core self-alignment process. The femtosecond laser side-illumination technique was utilized to ensure that the grating inscription region is precisely positioned and compact in size. Two well-defined core resonances were achieved in reflection: one originates from the core dip and the other originates from fiber core. The key point is that only one of these two reflective resonances exhibits a high sensitivity to fiber bend (and vibration), whereas the other is immune to it. For low frequency (<10 Hz) and weak vibration excitation (<0.3 m/s2) measurement, the proposed sensor shows a much higher resolution (1.7 × 10−3 m/s2) by simply monitoring the total power output of the high-order core mode reflection. Moreover, the sensor simultaneously provides an inherent power reference to eliminate unwanted power fluctuations from the light source and transmission lines, thus providing a means of evaluating weak seismic wave at low frequency.Qiangzhou RongTuan GuoWeijia BaoZhihua ShaoGang-Ding PengXueguang QiaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Qiangzhou Rong Tuan Guo Weijia Bao Zhihua Shao Gang-Ding Peng Xueguang Qiao Highly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber
description	Abstract A highly sensitive fiber-optic accelerometer based on detecting the power output of resonances from the core dip is demonstrated. The sensing probe comprises a compact structure, hereby a short section of specific core (with a significant core dip) fiber stub containing a straight fiber Bragg grating is spliced to another single-mode fiber via a core self-alignment process. The femtosecond laser side-illumination technique was utilized to ensure that the grating inscription region is precisely positioned and compact in size. Two well-defined core resonances were achieved in reflection: one originates from the core dip and the other originates from fiber core. The key point is that only one of these two reflective resonances exhibits a high sensitivity to fiber bend (and vibration), whereas the other is immune to it. For low frequency (<10 Hz) and weak vibration excitation (<0.3 m/s2) measurement, the proposed sensor shows a much higher resolution (1.7 × 10−3 m/s2) by simply monitoring the total power output of the high-order core mode reflection. Moreover, the sensor simultaneously provides an inherent power reference to eliminate unwanted power fluctuations from the light source and transmission lines, thus providing a means of evaluating weak seismic wave at low frequency.
format	article
author	Qiangzhou Rong Tuan Guo Weijia Bao Zhihua Shao Gang-Ding Peng Xueguang Qiao
author_facet	Qiangzhou Rong Tuan Guo Weijia Bao Zhihua Shao Gang-Ding Peng Xueguang Qiao
author_sort	Qiangzhou Rong
title	Highly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber
title_short	Highly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber
title_full	Highly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber
title_fullStr	Highly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber
title_full_unstemmed	Highly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber
title_sort	highly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/3fa7da5c28c143cfbf034084d89e727f
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_version_	1718388760083693568

Highly sensitive fiber-optic accelerometer by grating inscription in specific core dip fiber

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