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首页> 外文期刊>Sensing and Bio-Sensing Research >An in-line fiber-optic modal interferometer for simultaneous measurement of twist and ambient temperature
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An in-line fiber-optic modal interferometer for simultaneous measurement of twist and ambient temperature

机译：在线光纤模态干涉仪，用于同时测量扭曲和环境温度

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Abstract A novel and simple sensor based on fiber-optic modal interferometer fabricated by a segment of low elliptical hollow-core photonic bandgap fiber for simultaneous temperature and twist measurements is demonstrated. Meanwhile the sensor can also measure the twist angle and determine the twist direction simultaneously. The mode distribution of EHC-PBGF is demonstrated both in theory and experiments. There is an obvious difference of two transmission dips on the temperature and twist. The twist sensitivities of Dip 1 and Dip 2 are obtained to be ?31.95 and ?585.8 pm/(rad/m), respectively. The temperature sensitivities are 12.99 pm/°C for Dip 1 and 5.09 pm/°C for Dip 2, respectively. Two parameters of twist and temperature can be distinguished and measured simultaneously by using a sensing matrix. Meanwhile the structure is found to be weakly sensitive to the axial strain. It has the advantage of avoiding the crosstalk of strain in the applications.
机译：摘要提出了一种新型的基于光纤模态干涉仪的传感器，该传感器由一段低椭圆形空心光子带隙光纤构成，用于同时测量温度和扭曲。同时，传感器还可以测量扭转角并同时确定扭转方向。 EHC-PBGF的模式分布在理论和实验上都得到了证明。在温度和扭曲上，两个透射率下降存在明显差异。浸料1和浸料2的扭转敏感性分别为〜31.95和〜585.8pm /（rad / m）。浸入1的温度敏感性为12.99 pm /°C，浸入2的温度敏感性为5.09 pm /°C。通过使用传感矩阵，可以同时区分和测量扭曲和温度两个参数。同时，发现该结构对轴向应变不敏感。它具有避免应用中应变的串扰的优点。

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