一种新型本征倏逝波型光纤传感器的研究  

Study of a new intrinsic evanescent wave type optical fiber sensor

作　　者：余潘[1] 沈为民[1] 黄杰[1] 徐贲[1] 

机构地区：[1]中国计量学院光学与电子科技学院,浙江杭州310018

出　　处：《传感器与微系统》2011年第9期41-43,共3页Transducer and Microsystem Technologies

基　　金：浙江省自然科学基金资助项目(Y5090150);2009浙江省大学生科技成果推广项目

摘　　要：研究开发了一种新型本征型光纤倏逝波传感器。采用有机玻璃板和大半圆弧高抛光PVC管构成光纤支架,将60/125μm阶跃多模光纤隔一定距离剥除等长度涂覆层后缠绕于光纤支架上,其无涂覆层部分位于上下两PVC管之间,经化学腐蚀后获得裸芯总长度大于0.5 m的新型高灵敏本征型光纤倏逝波传感器。实验结果表明:该传感器对亚甲基蓝的探测浓度可达到10-8 mol/L量级,灵敏度达到2.66 L/μmol,其灵敏度高,结构简单,易制备,成本低,适用于溶液、气体里痕量物质的检测。A new intrinsic optic fiber evanescent wave sensor is developed. The sensor is fabricated with the 60/125 p.m step-index multimode optical fiber wrapped around a scaffold. The scaffold is integrated using plexiglass and large circular arc PVC pipe, the fiber is peeled off a section of length cladding at a certain distance, and a section of fiber by peeled cladding is located among two large circular arc PVC pipe. A new high sensitivity intrinsic optical fiber evanescent wave sensor with the bare core length more than 0.5 m can be obtained by application of chemical corrosion method. The experimental results show that the lowest concentration of the methylene blue solution can he detected up to the order of 10-s mol/L, the sensitivity is up to 2.66 L/μmol, the sensor has the advantages of high sensitivity, simple structure, easy fabricated, low cost, and it is suitable for the detection of trace amounts of substances in solution or gas.

关 键 词：传感器 本征型光纤传感器 倏逝波 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]