Abstract
A novel fiber inline Mach-Zehnder interferometer (MZI) is proposed for simultaneous measurement of curvature and temperature. The sensor composes of single mode-multimode-dispersion compensation-multimode-single mode fiber (MMF-DCF-MMF) structure, using the direct fusion technology. The experimental results show curvature sensitivities of −12.82 nm/m−1 and −14.42 nm/m−1 in the range of 0–0.65 m−1 for two resonant dips, as well as temperature sensitivities of 57.6 pm/°C and 74.3 pm/°C within the range of 20 °C–150 °C. In addition, the sensor has unique advantages of easy fabrication, low cost, high fringe visibility of 24dB, and high sensitivity, which shows a good application prospect in dual-parameters of sensing of curvature and temperature.
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Acknowledgement
This research work is supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 51875584 and 51875585), the National Key Research and Development Program of China (Grant Nos. 2017YFB1104800 and 2018YFB1107803), and the Fundamental Research Funds for the Central Universities of Central South University (Grant No. 1053320170003).
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Sun, X., Du, H., Dong, X. et al. Simultaneous Curvature and Temperature Sensing Based on a Novel Mach-Zehnder Interferometer. Photonic Sens 10, 171–180 (2020). https://doi.org/10.1007/s13320-019-0551-z
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DOI: https://doi.org/10.1007/s13320-019-0551-z