光纤布拉格光栅化学镀钴层的温度传感性能  

Temperature Sensing Performance of Electroless Cobalt Coating on Fiber Bragg Grating

作　　者：胡勇涛 李玉龙[1] 茶映鹏 

机构地区：[1]南昌大学机电工程学院江西省机器人及焊接自动化重点实验室,江西南昌330031 [2]江西五十铃发动机有限公司,江西南昌330200

出　　处：《材料保护》2014年第7期38-41,8,共4页Materials Protection

基　　金：国家自然科学基金(51265035);教育部留学回国人员科研启动基金;江西省自然科学基金(20132BAB206024)资助

摘　　要：为了有效地实现光纤布拉格光栅(FBG)的金属化和降低其生产成本,对FBG进行了化学镀钴。采用体视显微镜和扫描电镜对镀钴层的外貌和结合状况进行了分析;通过X射线衍射分析仪对镀钴层的结构进行了分析;使用光栅网格分析仪测试了镀钴FBG的温度传感性能,并以传感模型进行了验证。结果表明:FBG化学镀钴工艺参数选用14.1 g/L CoSO4,21.2 g/L NaH2PO2,141.1 g/L C11H13KO8,31.0 g/L H3BO3,pH值为10,温度90℃,时间1 h时,钴镀层均匀、平整,与FBG结合良好;FBG温度传感灵敏度随镀钴层增厚而加大,镀钴层厚度为5.0μm时温度传感灵敏度系数为12.21 pm/℃,实测温度灵敏度系数与理论结果有较高的一致性。Cobalt coating was prepared on the surface of optical fiber Bragg grating(FBG) by electroless plating.A stereo microscope and a scanning electron microscope were separately performed to observe the morphology of as-plated Co coating and its adhesion to the substrate.Moreover,the phase structure of the Co coating was analyzed by X-ray diffraction,and the temperature sensing performance of the Co coating was determined with a FBG network analyzer.Results indicated that the electroless Co plating bath for FBG had the optimized composition of 14.1 g/L CoS0_4,21.2 g/L NaH_2 PO_2,141.1 g/L C_(11)H_(13)KO_8,and 31.0 g/L H_3BO_3,while the optimized plating parameters were suggested as pH value of 10,temperature of 90 ℃,and plating duration of 1 h.The Co coating obtained under the optimized condition was uniform and smooth and exhibited good adhesion to the FBG substrate.Moreover,the temperature sensing sensitivity of the FBG increased with increasing thickness of Co coating,and the one containing Co coating with a thickness of 5.0 μm exhibited a temperature sensing sensitivity of 12.21 pm/℃.The measured temperature sensing sensitivity well conformed to the theoretical result.

关 键 词：化学镀钴 FBG 温度传感性能 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]