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Title: Alterable interferential fineness for high temperature sensing calibration based on Bragg hollow core fiber
Authors: Ran, Sixiang
Ni, Wenjun
Yang, Chunyong
Zhao, Zhongke
Wang, Shun
Shum, Perry Ping
Keywords: Engineering::Electrical and electronic engineering
Engineering::Civil engineering
Issue Date: 2023
Source: Ran, S., Ni, W., Yang, C., Zhao, Z., Wang, S. & Shum, P. P. (2023). Alterable interferential fineness for high temperature sensing calibration based on Bragg hollow core fiber. Optics Express, 31(15), 25207-25219.
Journal: Optics Express 
Abstract: We propose, what we believe to be, a novel method for high temperature sensing calibration based on the mechanism of alterable interferential fineness in Bragg hollow core fiber (BHCF). To verify the proof-of-concept, the fabricated sensing structure is sandwiched by two sections with different length of BHCF. Two interferential fineness fringes dominate the transmission spectrum, where the high-fineness fringes formed by anti-resonant reflecting optical waveguide (ARROW) plays the role for high temperature measurement. Meanwhile, the low-fineness fringes induced by short Fabry-Perot (F-P) cavity are exploited as temperature calibration. The experimental results show that the ARROW mechanism-based temperature sensitivity can reach 26.03 pm/°C, and the intrinsic temperature sensitivity of BHCF is 1.02 pm/°C. Here, the relatively lower magnitude of the temperature sensitivity is considered as the standard value since it merely relies on the material properties of silicon. Additionally, a large dynamic temperature range from 100 °C to 800 °C presents linear response of the proposed sensing structure, which may shine the light on the sensing applications in the harsh environment.
ISSN: 1094-4087
DOI: 10.1364/OE.493511
Schools: School of Civil and Environmental Engineering 
Rights: © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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