Relative Humidity Sensor Based on an Agarose-Infiltrated Photonic Crystal Fiber Interferometer
Relative Humidity Sensor Based on an Agarose-Infiltrated Photonic Crystal Fiber Interferometer
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DOI：
10.1109/jstqe.2011.2182337
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发表时间：
2012-09-01
影响因子：
4.9
通讯作者：
Farrell, Gerald
中科院分区：
文献类型：
--
作者：
Mathew, Jinesh;Semenova, Yuliya;Farrell, Gerald
本文详细研究了一种基于聚合物渗透光子晶体光纤干涉仪的微型光学相对湿度传感器。该传感器对湿度变化具有很高的灵敏度，当湿度变化为84%RH时，其反射功率的变化约为12 dB。该传感器的优点是长度非常紧凑，仅为1 mm，端型探头配置使其适用于监测微环境中的湿度。本文研究了该传感器的重复性、长期稳定性、测量精度和温度依赖性。所观察到的传感器的低热灵敏度表明，如果在正常环境中使用，则可能不需要温度补偿。传感器的响应时间被发现是400 ms的RH的变化类似于30% RH。快速的响应时间表明，传感器可以潜在地用作临床情况下的人类呼吸率监测器。
We report a detailed study of a miniature optical relative humidity (RH) sensor based on a polymer-infiltrated photonic crystal fiber interferometer. The sensor shows a high sensitivity to RH variations with a change in its reflected power of about 12 dBfor a humidity change of 84% RH. The sensor has the advantages of a very compact length of 1 mm, and an end-type probe configuration makes it suitable for monitoring humidity in microenvironments. The repeatability, long-term stability, measurement accuracy, and temperature dependence of the sensor are studied in this paper. The observed low thermal sensitivity of the sensor suggests that temperature compensation may not be needed if it is used in normal environments. The response time of the sensor is found to be 400 ms for a change in RH of similar to 30% RH. The fast response time suggests that the sensor can potentially be used as a human breath rate monitor in a clinical situation.