Low-Frequency Vibration Sensor with Dual-Fiber Fabry–Perot Interferometer Using a Low-Coherence LED

Wang, Mu-Chun; Chao, Shou-Yen; Lin, Chun-Yeon; Chang, Cheng-Hsun-Tony; Lan, Wen-How

doi:10.3390/cryst12081079

Open AccessArticle

Low-Frequency Vibration Sensor with Dual-Fiber Fabry–Perot Interferometer Using a Low-Coherence LED

by

Mu-Chun Wang

^1,*

,

Shou-Yen Chao

¹,

Chun-Yeon Lin

^2,*

,

Cheng-Hsun-Tony Chang

¹

and

Wen-How Lan

³

¹

Department of Electronic Engineering, Minghsin University of Science and Technology, Hsinchu 30401, Taiwan

²

Department of Mechanical Engineering, National Taiwan University, Taipei 106319, Taiwan

³

Department of Electrical Engineering, National University of Kaohsiung, Kaohsiung 81148, Taiwan

^*

Authors to whom correspondence should be addressed.

Crystals 2022, 12(8), 1079; https://doi.org/10.3390/cryst12081079

Submission received: 6 July 2022 / Revised: 22 July 2022 / Accepted: 23 July 2022 / Published: 1 August 2022

(This article belongs to the Special Issue Optoelectronics and Photonics in Crystals)

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Abstract

In this paper, we propose a dual-fiberoptic Fabry–Perot interferometer (FFPI) sensing system integrated with a low-cost and low-coherence light-emitting diode (LED) as a light source to detect dynamic vibration caused by acoustic waves with a cut-off frequency of 200 Hz. When the acoustic signals are applied, the sensing FFPI on a Styrofoam sheet provides the function of partially transforming the longitudinal energy as the transverse energy generates a phase shift in the sensing FFPI cavity. The light reflected from the sensor is demodulated by the reference FFPI to extract the measurand. The low-power (sub-nW) optical signals are transferred into electrical signals, processed by a designed optical receiver, and recorded for data analysis.

Keywords: Fabry–Perot interferometer; vibration; acoustic wave; sensing system; LED; coherence

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MDPI and ACS Style

Wang, M.-C.; Chao, S.-Y.; Lin, C.-Y.; Chang, C.-H.-T.; Lan, W.-H. Low-Frequency Vibration Sensor with Dual-Fiber Fabry–Perot Interferometer Using a Low-Coherence LED. Crystals 2022, 12, 1079. https://doi.org/10.3390/cryst12081079

AMA Style

Wang M-C, Chao S-Y, Lin C-Y, Chang C-H-T, Lan W-H. Low-Frequency Vibration Sensor with Dual-Fiber Fabry–Perot Interferometer Using a Low-Coherence LED. Crystals. 2022; 12(8):1079. https://doi.org/10.3390/cryst12081079

Chicago/Turabian Style

Wang, Mu-Chun, Shou-Yen Chao, Chun-Yeon Lin, Cheng-Hsun-Tony Chang, and Wen-How Lan. 2022. "Low-Frequency Vibration Sensor with Dual-Fiber Fabry–Perot Interferometer Using a Low-Coherence LED" Crystals 12, no. 8: 1079. https://doi.org/10.3390/cryst12081079

APA Style

Wang, M.-C., Chao, S.-Y., Lin, C.-Y., Chang, C.-H.-T., & Lan, W.-H. (2022). Low-Frequency Vibration Sensor with Dual-Fiber Fabry–Perot Interferometer Using a Low-Coherence LED. Crystals, 12(8), 1079. https://doi.org/10.3390/cryst12081079

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Low-Frequency Vibration Sensor with Dual-Fiber Fabry–Perot Interferometer Using a Low-Coherence LED

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