基于单模-多模-单模光纤模间干涉的温度传感特性研究  

Research on Temperature Sensing Characteristics Based on Modular Interference of Single-Mode-Multimode-Single-Mode Fiber

作　　者：黄泽铗[1] 李强[1] 徐雅芹[1] 张凌云[1] 史冀[1] 刘岚岚[1] 赵红敏[1] 范玲[1] 王智[1] 

机构地区：[1]北京交通大学理学院光信息科学与技术研究所发光与光信息技术教育部重点实验室,北京100044

出　　处：《中国激光》2013年第6期198-203,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(61077048);北京市自然科学基金(4132035);高等学校博士学科点专项科研基金(20120009110032);中央高校基本科研业务费(2009JBM103;2012JBM103);北京交通大学大学生创新训练项目资助课题

摘　　要：基于单模-多模-单模(SMS)光纤输出光功率随温度的变化规律,提出了一种温度测量的理论模型,并实现了一种新型的测温系统。通过测量光功率变化的相位即可得到与之呈线性关系的温度变化。通过两个温度变化过程对该系统进行定标,得到相位与温度之间的定标系数为2.5347。对自然快速升温和线性缓慢升温两个过程进行了实验测试,系统误差小于5%。A theoretical model is proposed and a novel system is built for measuring temperature based on the change rule for output power of single-mode-multimode-single-mode （SMS） fiber with temperature. The new measuring system can get the variation of the temperature which has a linear relationship with the output power by measuring the phase change of the output power. The calibration coefficient between the phase and the temperature is 2. 5347 for a particular SMS fiber hy comparing the two temperature variation. Then, a naturally rapid warming and a linearly slow warming of the temperature are checked by the SMS fiber and a thermometer. It is shown that the error is less than 5 %.

关 键 词：光纤光学 光纤温度传感 单模-多模-单模光纤结构 模间干涉 HILBERT变换 

分 类 号：O439[机械工程—光学工程]