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Sensors 2018, 18(1), 273; doi:10.3390/s18010273

Fabry-Perot Interferometric High-Temperature Sensing Up to 1200 °C Based on a Silica Glass Photonic Crystal Fiber

National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China
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Received: 18 December 2017 / Revised: 14 January 2018 / Accepted: 14 January 2018 / Published: 18 January 2018
(This article belongs to the Special Issue Optical Fiber Sensors 2017)
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Abstract

A Fabry-Perot interferometric sensor for temperature measurement was fabricated based on a silica glass solid-core photonic crystal fiber with a central air-bore. By splicing a stub of photonic crystal fiber to a standard single-mode fiber, an intrinsic Fabry-Perot cavity was formed inside the photonic crystal fiber. Sensing experiment results show that the sensor can work stably for a consecutive 24 h under temperatures up to 1100 °C, and the short-term operation temperature can reach as high as 1200 °C (<30 min). In the measurement range of 300–1200 °C, the temperature sensitivity of the peak wavelength shift can reach as high as 15.61 pm/°C, with a linearity of 99.76%. The presented interferometric sensor is compact in size and possesses advantages such as an extended working range and high sensitivity, showing promising application prospects. View Full-Text
Keywords: optical fiber sensor; high temperature; photonic crystal fiber; Fabry-Perot interferometer optical fiber sensor; high temperature; photonic crystal fiber; Fabry-Perot interferometer
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Yu, H.; Wang, Y.; Ma, J.; Zheng, Z.; Luo, Z.; Zheng, Y. Fabry-Perot Interferometric High-Temperature Sensing Up to 1200 °C Based on a Silica Glass Photonic Crystal Fiber. Sensors 2018, 18, 273.

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