Chitosan based fiber-optic Fabry-Perot humidity sensor
Chitosan based fiber-optic Fabry-Perot humidity sensor
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DOI：
10.1016/j.snb.2012.04.052
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发表时间：
2012-07-05
影响因子：
8.4
通讯作者：
Leong, K. C.
中科院分区：
文献类型：
--
作者：
Chen, L. H.;Li, T.;Leong, K. C.
介绍了一种基于法布里-珀罗干涉结构的相对湿度光纤传感器。所提出的光纤传感器是由一层薄的湿敏感天然聚合物壳聚糖功能化，形成一个低细度的法布里-珀罗传感器。本文采用的传感方案是基于壳聚糖传感膜的膨胀效应（膨胀程度随相对湿度的变化而变化），当相对湿度改变时，会引起光路调制。结果表明，该传感器在20%RH ~ 95%RH的相对湿度范围内的灵敏度为0.13 nm/%RH， RH不确定度为+/- 1.68%RH，响应时间为380 ms。(C) 2012 Elsevier B.V.版权所有
A relative humidity fiber sensor based on Fabry-Perot interferometry configuration is presented. The proposed fiber sensor is functionalized with a thin layer of a moisture-sensitive natural polymer chitosan to form a low fineness Fabry-Perot sensor. The sensing scheme used in this work is based on the swelling effect of chitosan sensing film (degree of swelling varies as a function of relative humidity) which will induce optical path modulation when relative humidity is changed. As observed, the proposed sensor exhibits a sensitivity of 0.13 nm/%RH for relative humidity ranging from 20%RH to 95%RH with a RH uncertainty of +/- 1.68%RH and fast response time of 380 ms. (C) 2012 Elsevier B.V. All rights reserved.