期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 92, 期 1-2, 页码 44-48出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-4005(03)00006-6
关键词
evanescent; optical fiber; response time; diffusion; taper profile; absorption; sensor
In this paper, the detection of gases using attenuated total internal reflection (ATR) technique has been theoretically described in multimode step-index, tapered fiber with porous cladding. Using a modal approach the response time and sensitivity of the sensor have been obtained in cases of parabolic, linear and exponential-linear tapered optical fiber. It has been shown that the sensor response time and the minimum detectable concentration depend on the taper ratio and geometry of the taper profiles for given fiber parameters, the absorptivity of gas and the diffusion coefficient in the porous cladding. For a given taper profile, the higher the taper ratio, the smaller the response time and the minimum detectable concentration. Additionally, the sensor with the exponential-linear taper profile has showed faster response times and lower minimum detectable concentrations than those with the parabolic and linear profile in the case of a particular taper ratio. (C) 2003 Elsevier Science B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据