Highly Integrated All-Fiber FP/FBG Sensor for Accurate Measurement of Strain under High Temperature

Yang, Tingting; He, Xiu; Ran, Zengling; Xie, Zhendong; Rao, Yunjiang; Qiao, Xueguang; He, Zhengxi; He, Peng

doi:10.3390/ma11101867

Open AccessArticle

Highly Integrated All-Fiber FP/FBG Sensor for Accurate Measurement of Strain under High Temperature

by

Tingting Yang

¹

,

Xiu He

¹,

Zengling Ran

^1,*,

Zhendong Xie

¹,

Yunjiang Rao

¹,

Xueguang Qiao

²,

Zhengxi He

³ and

Peng He

³

¹

Fiber Optics Research Center, Key Laboratory of Optical Fiber Sensing & Communications (Ministry of Education), University of Electronic Science & Technology of China, Chengdu 611731, China

²

Department of Physics, Northwest University, Taibai Beilu 229, Xi’an 710069, China

³

Nuclear Power Institute of China, Chengdu 610041, China

^*

Author to whom correspondence should be addressed.

Materials 2018, 11(10), 1867; https://doi.org/10.3390/ma11101867

Submission received: 5 September 2018 / Revised: 27 September 2018 / Accepted: 28 September 2018 / Published: 1 October 2018

(This article belongs to the Special Issue Electronic Skin and Its Strain Sensing Application)

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Abstract

Accurate measurement of strain is one of the most important issues for high temperature environments. We present a highly integrated all-fiber sensor to achieve precise measurements of strain/high-pressure, which consists of a fiber Bragg grating (FBG) inscribed by an 800 nm femtosecond laser cascaded with a micro extrinsic Fabry–Perot (FP) cavity fabricated by the 157 nm laser micromachining technique. FBG is sensitive to temperature, but insensitive to strain/pressure, whereas the FP is sensitive to strain/pressure, but has a small dependence on temperature. Therefore, such a cascaded sensor could be used for dual-parameter measurement and can work well at high temperatures. Experimental results indicate that this device exhibits a good strain characteristic at high temperatures and excellent high-pressure performance at room temperature. Due to its highly sensitive wavelength response, the proposed sensor will have remarkable potential applications in dual parameter sensing in harsh environments.

Keywords: optical fiber sensors; strain/pressure sensing; Fabry–Perot; FBG; dual-parameter measurement; high temperature

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MDPI and ACS Style

Yang, T.; He, X.; Ran, Z.; Xie, Z.; Rao, Y.; Qiao, X.; He, Z.; He, P. Highly Integrated All-Fiber FP/FBG Sensor for Accurate Measurement of Strain under High Temperature. Materials 2018, 11, 1867. https://doi.org/10.3390/ma11101867

AMA Style

Yang T, He X, Ran Z, Xie Z, Rao Y, Qiao X, He Z, He P. Highly Integrated All-Fiber FP/FBG Sensor for Accurate Measurement of Strain under High Temperature. Materials. 2018; 11(10):1867. https://doi.org/10.3390/ma11101867

Chicago/Turabian Style

Yang, Tingting, Xiu He, Zengling Ran, Zhendong Xie, Yunjiang Rao, Xueguang Qiao, Zhengxi He, and Peng He. 2018. "Highly Integrated All-Fiber FP/FBG Sensor for Accurate Measurement of Strain under High Temperature" Materials 11, no. 10: 1867. https://doi.org/10.3390/ma11101867

APA Style

Yang, T., He, X., Ran, Z., Xie, Z., Rao, Y., Qiao, X., He, Z., & He, P. (2018). Highly Integrated All-Fiber FP/FBG Sensor for Accurate Measurement of Strain under High Temperature. Materials, 11(10), 1867. https://doi.org/10.3390/ma11101867

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Highly Integrated All-Fiber FP/FBG Sensor for Accurate Measurement of Strain under High Temperature

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