耐高温光纤Bragg光栅的响应特性研究  

Response characteristics of high temperature resistant fiber Bragg grating

作　　者：乔学光[1] 李婷[1] 王宏亮[1] 贾振安[1] 刘钦朋[1] 王向宇[1] 

机构地区：[1]西安石油大学光纤传感重点实验室,西安710065

出　　处：《应用光学》2007年第2期209-211,共3页Journal of Applied Optics

基　　金：国家"863"高技术研究发展计划资助项目(2002AA313150);国家自然科学基金资助项目(69877025);国家教育部科学技术重点项目(02190);陕西省教育厅产业化培育项目"光纤传感测井系统应用研究"(05J(23));西安市科技局信息技术专项项目"光纤传感测井系统应用研究"(ZX05041);中国石油天然气集团公司应用基础研究项目"井下永久光纤温度;压力传感器设计方法研究"(20050719)

摘　　要：以耐高温光纤光栅和普通的光纤光栅为实验研究对象,研究了其高温特性。普通的FBG,当温度超过300℃以上,光纤光栅已变黑变脆,虽然有传感特性,但已不能在实际中应用;通过对耐高温光栅裸栅进行300℃以上的高温实验,发现耐高温FBG处于20℃-350℃之间时反射波长与温度之间有着良好的线性关系,且光栅性能良好,没有出现被碳化现象,灵敏度为0.01 nm/M Pa;随着温度进一步升高,FBG反射波长与温度开始呈现非线性关系。实验结果表明,耐高温光栅适合于高温油气井下应用。The temperature characteristics of high temperature resistant FBG and the ordinary FBG were experimentally investigated. The ordinary FBG becomes black and brittle, and can not be used in practice even though it still has sensing feature, when temperature reaches more than 300 ℃. The experiment with the high temperature FBG indicates that the high temperature resistant FBG has good linearity from 20 ℃ to 350 ℃, and it is not carbonized, the sensitivity is 0. 01 nm/MPa, but the linearity is deteriorated with the further increase of temperature. The result shows that the high temperature resistant FBG can be used for the high temperature oil downhole measurement.

关 键 词：光纤布拉格光栅(FBG) 反射波长 高温特性 温度灵敏度系数 

分 类 号：TN253[电子电信—物理电子学]