光纤光栅无应力毛细铜管封装及温度特性实验  

Experimental study on temperature sensing characteristics of fiber Bragg grating packaged by copper capillary without strain

作　　者：王鹏[1] 赵洪[2] 刘杰[1] 张伟超[1] 宋方超[1] 

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080 [2]工程电介质及其应用技术教育部重点实验室,黑龙江哈尔滨150080

出　　处：《光电子．激光》2012年第3期434-438,共5页Journal of Optoelectronics·Laser

基　　金：国家科技支撑计划(2007BAA05B05);黑龙江省自然科学基金重点(ZD200815);哈尔滨理工大学青年科学研究基金(2011YF014)资助项目

摘　　要：为克服裸光纤布拉格光栅(FBG)脆弱易折断的缺点,提出了一种聚合物和毛细铜管相结合的封装工艺。先用丙烯酸酯对栅区进行二次涂覆,再将二次涂覆后的FBG封装在毛细铜管内,FBG在毛细铜管内处于有余长无应力状态,二次涂覆为裸FBG提供了有效的保护。测试结果表明,二次涂覆并没有改变FBG的温度灵敏度;较薄的涂覆厚度保证了涂覆的均匀性和涂覆后光谱的质量;无胶空管封装方式消除了聚合物内部应力对温度测量精度的影响。封装后的温度特性实验表明,FBG传感器线性度为0.999 29,温度灵敏度为13.675pm/℃,重复性较好。Due to the fragility of bare fiber Bragg grating （FBG） ,an approach of polymer and copper capillary packaging .for FBG is proposed in this paper. The FBG is coated with acrylate. After the second coating, the FBG is packaged into a blank copper capillary. The FBG can expand or contract freely without strain. The second coating protects bare FBG from damage. The comparison of the experimental results between coated FBG and bare FBG indicates that the temperature sensitivity of coated FBG is nearly the same as that of bare FBG. The thin coating thickness guarantees that the coating thickness is uniform and the spectrum of coated FBG has a good shape. The influence on measurement precision of temperature from strain is decreased. The empirical results show that the coefficient between wavelength and temperature is 0. 999 29,and the measurement sensitivity is 13. 675 pm/℃. The temperature sensor has a good repeatability.

关 键 词：光纤布拉格光栅(FBG) 封装工艺 毛细铜管 温度传感 

分 类 号：TN253[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]