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Highly Sensitive Temperature and Humidity Sensor Based on Carbon Nanotube-Assisted Mismatched Single-Mode Fiber Structure

机译:基于碳纳米管辅助不匹配单模光纤结构的高灵敏度温湿度传感器

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摘要

Here we report on a miniaturized optical interferometer in one fiber based on two mismatched nodes. The all-fiber structure shows stable performance of temperature and humidity sensing. For temperature sensing in large ranges, from 40 to 100 °C, the sensor has a sensitivity of 0.24 dB/°C, and the adjusted R-squared value of fitting result reaches 0.99461 which shows a reliable sensing result. With carbon nanotubes coating the surface of the fiber, the temperature sensitivity is enhanced from 0.24561 to 1.65282 dB/°C in a small region, and the performance of humidity sensing becomes more linear and applicable. The adjusted R-squared value of the linear fitting line for humidity sensing shows a dramatic increase from 0.71731 to 0.92278 after carbon nanotube coating, and the humidity sensitivity presents 0.02571 nm/%RH.
机译:在这里,我们报告了一种基于两个失配节点的光纤中的微型光学干涉仪。全纤维结构显示出稳定的温度和湿度感测性能。对于40至100°C的大范围温度感测,该传感器的灵敏度为0.24 dB /°C,并且拟合结果的调整后R平方值达到0.99461,表明可靠的感测结果。用碳纳米管覆盖纤维表面,在小范围内温度灵敏度从0.24561提高到1.65282 dB /°C,湿度感测的性能变得更加线性和适用。碳纳米管涂布后,用于湿度感应的线性拟合线的调整后R平方值显示从0.71731急剧增加至0.92278,并且湿度灵敏度为0.02571 nm /%RH。

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