Simultaneous Measurement of Temperature and Refractive Index Using a Fiber Bragg Grating and a Multimode Fiber

Abstract:

We introduce an all-fiber sensor capable of simultaneous measurement of temperature and refractive index (RI). The sensor system consists of a single mode fiber Bragg grating (FBG) and a single-mode-multimode-single-mode (SMS) structure which serves as a Mach-Zehnder interferometer (MZI), and the multimode fiber (MMF) is etched by hydrofluoric acid solution. The experimental results demonstrate that the temperature sensitivities of FBG and MZI are 0.016nm/°C and 0.093nm/°C, respectively, and the RI sensitivity of MZI achieves 226.25nm/RIU. The interesting properties of the sensor include compact size, high sensitivity and good operation linearity.

• Periodical: Applied Mechanics and Materials (Volumes 130-134)
• Pages: 4053-4056
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.130-134.4053
• Online since: October 2011
• Authors: Zheng Rong Tong, Yang Guo, Xiu Feng Yang, Ye Cao
• Keywords: Fiber Bragg Grating (FBG), MZI, RI, Simultaneous Measurement, SMS

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