具有温度自补偿功能的光纤光栅传感器结构  

Structure of Fiber Grating Sensor with Temperature Compensation

作　　者：李向阳[1] 韩旗[1] 江舒[2] 缪凯祥 曹进 

机构地区：[1]海军装备部驻上海地区军事代表局,上海200031 [2]中船重工第七0四研究所,上海200031 [3]重庆市计量质量检测研究院,重庆401123

出　　处：《机电设备》2016年第1期37-39,共3页Mechanical and Electrical Equipment

摘　　要：介绍了一种基于自身负应变系数的长周期光纤光栅的无源温度补偿封装技术。长周期光纤光栅在拉紧的状态下粘贴在了材料为铜或树脂玻璃的衬底材料上,衬底材料受热膨胀引起的应变变化将用来补偿温度漂移。实验结果表明,未补偿的光纤光栅的温度灵敏度为118 pm/℃左右,相对而言,安装在铜制衬底上的光纤光栅的温度灵敏度更低(78 pm/℃左右)。同时安装在树脂玻璃衬底的光纤光栅的透射光谱的波形发生了改变,实验证明这种材料的衬底可以改善长周期光纤光栅波长的稳定性。A passive temperature-compensating package of Long Period Fiber Grating（LPFG） is designed based on its negative strain coefficient. LPFG is pasted on the substrate material, such as copper and Plexiglas, under tension. The strain induced by the thermal expansion of substrate material is used for temperature compensating.The experimental results show that the mounted grating on copper exhibited lower temperature sensitivity（about 78 pm/℃）, compared with uncompensated grating（about 118 pm/℃）. But the transmission spectrum waveform of the mounted grating on Plexiglas change. It is demonstrated that this package could improve the wavelength stability of LPFG when appropriated substrate material is chosen.

关 键 词：温度补偿 长周期光纤光栅 负应变系数 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]