中国激光, 2011, 38 (s1): s105004, 网络出版: 2012-01-06
金属纳米线栅在光纤传感器中的应用
Application of the Wire Metal Grating in the Fiber Sensors
传感器 光纤传感 金属线栅 有效介质理论 弹光效应 法拉第效应 sersors fiber sensor wire metal grating effective medium theory photoelastic effect Faraday effect
摘要
利用聚焦离子束技术将金属线栅结构加工到一个工作在1550 nm波段的标准单模光纤的端面。金属线栅选用的金属是金，周期为 200 nm，尺寸远小于入射光的波长。根据有效介质理论，通过金属线栅结构的透射光为偏振光。TE模式和TM模式的反射率对比度为13.7 dB，其对比度和灵敏度可满足弹光效应和法拉第磁光效应引起的偏振性变化的检测要求。基于金属线栅结构，得到了灵敏度为0.237 rad/N的压力传感器和灵敏度为0.06022°/A的电流传感器。
Abstract
The wire metal grating (WMG) is fabricated on the tip of a standard single mode fiber (SMF) at 1550 nm wavelength by focused ion beam (FIB) technology. The metal used is Au and period of the grating is 200 nm, much smaller than the wavelength of incident light. The transmission light entering the structure is polarization according to the effective medium theory (EMT)）.The reflection contrast between TE and TM modes in our experiment reaches 13.7 dB, which is sensitive enough to monitor the polarization change induced by photoelastic effect and Faraday effect. Based on this WMG grating, a pressure sensor with the sensitivity of 0.237 rad/N and a current sensor with the sensitivity of 0.06022°/A are presented.
张明, 赵云, 周峰, 徐飞, 陆延青. 金属纳米线栅在光纤传感器中的应用[J]. 中国激光, 2011, 38(s1): s105004. Zhang Ming, Zhao Yun, Zhou Feng, Xu Fei, Lu Yanqing. Application of the Wire Metal Grating in the Fiber Sensors[J]. Chinese Journal of Lasers, 2011, 38(s1): s105004.
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