光纤Bragg光栅倏逝波传感器  

Evanescent Wave Sensors Based on Fiber Bragg Grating

作　　者：赵明富[1] 黄德翼[1] 罗彬彬[1,2] 矫雷子[1] 周斌[1] 

机构地区：[1]重庆理工大学电子信息与自动化学院,重庆400050 [2]电子科技大学光电信息学院,成都610054

出　　处：《重庆理工大学学报（自然科学）》2010年第10期46-50,共5页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(50876120);重庆市教委基金资助项目(KJ090620);重庆市科委基金资助项目(CSTC;2009DA0001-B11)

摘　　要：提出光纤Bragg光栅(FBG)倏逝波传感器测量化学溶液折射率的方案,研究Bragg反射波长的漂移量与光栅包层直径之间的关系,理论分析得出:光栅包层直径越小,Bragg波长的漂移量受外界折射率变化的影响越大。用氢氟酸溶液腐蚀光栅包层的方法,制作不同包层直径的光纤Bragg光栅倏逝波传感器。实验表明:在相同的外部折射率变化范围内,光栅直径越小,传感器的折射率灵敏度越高,实验结果与理论分析一致。A fiber optic sensing system for measurement of surrounding medium refractive index based on fiber Bragg grating Evanescent wave technology is presented in this paper. The theoretical analysis results indicate that the smaller grating cladding diameter, the larger the influence of environment refractive index change on Bragg wavelength drift. The fabrication process, which relies on Hydrofluoric acid （HF） etching of the fiber-Bragg-grating cladding , is applied to make different cladding diameter fiber Bragg gratings （FBG）. The results show that at the same environment refractive index change the smaller grating cladding diameter, the higher the with the theoretical analysis sensitivity of a sensor, which is in agreement

关 键 词：光纤Bragg光栅(FBG) 倏逝波 折射率传感器 灵敏度 

分 类 号：TN253[电子电信—物理电子学]