Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7149913 | Sensors and Actuators B: Chemical | 2012 | 6 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
L.H. Chen, T. Li, C.C. Chan, R. Menon, P. Balamurali, M. Shaillender, B. Neu, X.M. Ang, P. Zu, W.C. Wong, K.C. Leong,