Abstract The influence of temperature on a refractive index (RI) sensor based on an in-line fiber Mach-Zehnder interferometer (MZI) was investigated in both simulation and experiment. The RI sensing performance of the sensor was investigated at different temperature (25–60 °C) over an RI range of 1.33–1.37, and the RI sensitivity of the sensor was around −20.00 nm/RIU at different temperature. The results showed that the temperature variation led to a RI deviation in the RI measurement, but hardly affect the RI sensitivity. To eliminate the RI deviation in the measurement, the RI correction was given.

中文翻译：

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温度对基于纤芯偏移在线光纤Mach-Zehnder干涉仪的折射率传感器的影响

摘要 通过仿真和实验研究了温度对基于在线光纤马赫-曾德干涉仪 (MZI) 的折射率 (RI) 传感器的影响。在 1.33-1.37 的 RI 范围内，在不同温度（25-60 °C）下研究了传感器的 RI 传感性能，传感器的 RI 灵敏度在不同温度下约为 -20.00 nm/RIU。结果表明，温度变化导致 RI 测量中的 RI 偏差，但几乎不影响 RI 灵敏度。为了消除测量中的 RI 偏差，给出了 RI 校正。