反射式掺杂液晶光子晶体光纤电场传感实验研究  

Experimental study of reflection-type liquid crystal infiltrated photonic crystal fiber for electric field intensity measurement

作　　者：孟庆莹[1] 任广军[1] 李敬辉[2] 姚建铨[2] 

机构地区：[1]天津理工大学电子信息工程学院薄膜电子与通信器件天津市重点实验室,通信器件与技术教育部工程研究中心,天津300384 [2]天津大学精密仪器与光电子工程学院激光与光电子研究所,光电信息科学技术教育部重点实验室,天津300072

出　　处：《光电子．激光》2012年第9期1713-1716,共4页Journal of Optoelectronics·Laser

基　　金：国家“973"计划(2010CB327801);国家博士后基金(20090460691)资助项目

摘　　要：提出了一种反射式结构的掺杂向列液晶(NLC)光子晶体光纤(PCF)电场测量传感器。传感器由小于1cm长的掺入液晶实芯PCF构成,在掺杂光纤端面镀Ag膜以提高端面反射率。通过实验,测量出了反射光强随电场强度增加的变化情况,证实了设计的传感器可以用于电场在1.4～3.7kVrms/mm范围内的电场测量,同时获得了镀膜对反射光强的影响以及对传感器灵敏度、精度的影响。The application of reflection-type nematic liquid crystal （NLC） infiltrated photonic crystal fiber （PCF） as a sensor for electric field intensity measurements is demonstrated. The sensor probe consists of a section of infiltrated photonic crystal fiber with length less than 1 cm. We coated silver film on the bottom of infiltrated photonic crystal fiber in order to enhance the reflectivity. The electric field dependent reflection intensity at 1 550 nm wavelength is experimentally discussed. And it also confirms that these structures can be used to accurately measure the electric field intensity （1.4--3.7 kVrms/mm）. The experiment results show the impacts of Ag coating on reflection intensity, sensitivity and measuring accuracy of the sensor.

关 键 词：向列液晶(NLC) 光子晶体光纤(PCF) 电场传感器 

分 类 号：TN253[电子电信—物理电子学]