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.

中文翻译：

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基于新型Mach-Zehnder干涉仪的同时曲率和温度感测

提出了一种新型的光纤在线马赫曾德尔干涉仪（MZI），用于同时测量曲率和温度。该传感器采用直接融合技术，由单模-多模色散补偿-多模-单模光纤（MMF-DCF-MMF）结构组成。实验结果表明，对于两个共振倾角，曲率敏感度在0-0.65 m ^-1范围内，分别为-12.82 nm / m ^-1和-14.42 nm / m ^-1，温度敏感性为57.6 pm /°C和74.3 pm /°C在20°C–150°C的范围内。另外，该传感器具有制造容易，成本低，条纹可见度高（24dB）和灵敏度高等独特优势，在曲率和温度双参数检测中显示出良好的应用前景。