Highly Sensitive Temperature Fiber Sensor Based on Mach-Zehnder Interferometer |
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Authors: | Jui-Ming Hsu Jian-Zhi Chen Wen-Hao Zheng |
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Institution: | Department of Electro-Optical Engineering, National United University, Miaoli, Taiwan, R.O.C. |
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Abstract: | We propose a highly sensitive temperature fiber sensor based on a Mach-Zehnder Interferometer (MZI). The MZI is composed of a piece of no-core fiber (NCF), a single-mode fiber (SMF), and a fiber taper (FT) structure. To accomplish high sensitivity, the component was immersed in a material with high thermo-optic coefficient (TOC). The experimental results showed that a high temperature sensitivity of 1.56 nm/°C was achieved for surrounding material with a refractive index (RI) of 1.45. The presented sensor has numerous advantages, for instance, extremely high sensitivity, easy fabrication, simple structure, compact size, and in-line applications. |
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Keywords: | Fiber taper Mach-Zehnder interferometer optical fiber sensor temperature sensor |
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