温度不敏感双布拉格光纤光栅化学浓度传感器的研究
首发时间:2008-11-18
摘要:本文阐述了长周期光纤光栅(LPFG)和布拉格光纤光栅(FBG)化学浓度传感器的结构与传感原理,分别研究了基于LPFG和FBG的传感器在化学溶液浓度测量中消除温度敏感对传感影响的机理,并通过实验进行了验证。分析了两种化学浓度传感器的灵敏度,其中我实验室研制的双布拉格光纤光栅(FBG)化学浓度传感器通过测量布拉格光栅的双峰偏移间距来实现传感,其灵敏度可达到蔗糖溶液浓度每1%的变化,反射波长移动0.096nm。
关键词: 长周期光纤光栅 布拉光纤光栅 双布拉格光纤光栅 温度不敏感
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The Research of Temperature-Insensitive Chemical Concentration Sensor Based Twin Bragg Fiber Grating
Abstract:The structure and sensing mechanism of long-period fiber grating(LPFG) and fiber bragg grating(FBG) chemical sensor are introduced. The influence of reducing temperature sensitivity of LPFG and FBG chemical sensor is focused on and expertmentally investigated,respectively. The temperature-insensitive LPFG and FBG chemical sensor in concentration measurement of chemical solutions are analysed. In our lab, one method based twin FBG is designed by measuring the peak wavelength difference between twin FBG, which has the sensitivity of 0.096nm for change 1% concentration of sugar solutions.
Keywords: LPFG FBG Twin Bragg Fiber Grating Temperature-Insensitive
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