Curvature and Temperature Measurement Based on a Few-Mode PCF Formed M-Z-I and an Embedded FBG
AbstractWe have experimentally demonstrated an optical fiber Mach-Zehnder interferometer (MZI) structure formed by a few-mode photonic crystal fiber (PCF) for curvature measurement and inscribed a fiber Bragg grating (FBG) in the PCF for the purpose of simultaneously measuring temperature. The structure consists of a PCF sandwiched between two multi-mode fibers (MMFs). Bending experimental results show that the proposed sensor has a sensitivity of −1.03 nm/m−1 at a curvature range from 10 m−1 to 22.4 m−1, and the curvature sensitivity of the embedded FBG was −0.003 nm/m−1. Temperature response experimental results showed that the MZI’s wavelength, λa, has a sensitivity of 60.3 pm/°C, and the FBG’s Bragg wavelength, λb, has sensitivity of 9.2 pm/°C in the temperature range of 8 to 100 °C. As such, it can be used for simultaneous measurement of curvature and temperature over ranges of 10 m−1 to 22.4 m−1 and 8 °C to 100 °C, respectively. The results show that the embedded FBG can be a good indicator to compensate the varying ambient temperature during a curvature measurement. View Full-Text
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Liu, H.; Yang, H.; Qiao, X.; Wang, Y.; Liu, X.; Lee, Y.-S.; Lim, K.-S.; Ahmad, H. Curvature and Temperature Measurement Based on a Few-Mode PCF Formed M-Z-I and an Embedded FBG. Sensors 2017, 17, 1725.
Liu H, Yang H, Qiao X, Wang Y, Liu X, Lee Y-S, Lim K-S, Ahmad H. Curvature and Temperature Measurement Based on a Few-Mode PCF Formed M-Z-I and an Embedded FBG. Sensors. 2017; 17(8):1725.Chicago/Turabian Style
Liu, Hui; Yang, Hangzhou; Qiao, Xueguang; Wang, Yongqiang; Liu, Xiaochong; Lee, Yen-Sian; Lim, Kok-Sing; Ahmad, Harith. 2017. "Curvature and Temperature Measurement Based on a Few-Mode PCF Formed M-Z-I and an Embedded FBG." Sensors 17, no. 8: 1725.
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