高双折射光子晶体光纤的设计与传感特性分析  

Design and sensing characteristics analysis of high birefringence photonic crystal fiber

作　　者：廖振鑫 刘理 毛莉莉[1] 曾伟 漆世锴 劳泽锋 LIAO Zhenxin;LIU Li;MAO lili;ZENG Wei;QI Shikai;XU Qing(Jiujiang University,College of Electronic and Information Engineering,Jiujiang 332005,China)

机构地区：[1]九江学院电子信息工程学院,江西九江332005

出　　处：《光学技术》2024年第4期448-452,共5页Optical Technique

基　　金：国家自然科学基金(62061021和62161014);江西省教育厅科技项目(GJJ190932);大学生创新创业训练项目(202211843003)。

摘　　要：为了提高光纤的双折射率以及传感灵敏度,提出了一种基于椭圆形孔阵列的光子晶体光纤,通过空气孔调制光纤的折射率分布,有效的提高了光纤的双折射率,并基于全矢量有限单元分析法,研究了光纤色散、限制损耗以及温度传感特性。仿真结果表明,孔阵列椭圆率为2时,光纤的双折射率高达1.92×10^(-2),且限制性损耗低至10^(-10) dB·km^(-1)数量级,同时色散约为-15.54ps·km^(-1)·nm^(-1)。通过填充液体增敏的方式,有效提高了光纤基模的热光系数,热光系数高达9.5×10^(-5)/℃,可用于高灵敏度光纤温度传感。In order to improve the birefringence and sensing sensitivity of optical fiber,aphotonic crystal fiber based on elliptical hole array is proposed.The refractive index distribution of optical fiber is modulated by air holes,which effectively improves the birefringence of optical fiber.Based on the full vector finite element analysis method,the dispersion,limiting loss and temperature sensing characteristics of optical fiber are studied.The simulation results show that the birefringence of the fiber is as high as 1.92×10^(-2) when the ellipticity of hole array is 2.The limiting loss is as low as 10^(-10) dB/km,and the dispersion is about-15.54ps·km^(-1)·nm^(-1).The thermos-optic coefficient of the fundamental mode of the optical fiber is effectively improved by filling liquid for sensitization,and the thermos-optic coefficient is up to 9.5×10^(-5)/℃,which can be used for optical fiber high sensitivity temperature sensing.

关 键 词：双折射 光子晶体光纤 色散 温度传感 

分 类 号：TN252[电子电信—物理电子学]