摘要
提出一种用于液体传感的光子晶体光纤的结构和设计方法。将六边形光子晶体光纤的纤芯区域设计成2个椭圆空气孔,分别填充水和乙醇,进而比较两种光子晶体光纤结构的传播特性。采用全矢量有限元法对所设计光子晶体光纤结构的双折射、相对灵敏度、限制损耗、非线性系数进行数值分析,对光纤各项参数的优化及纤芯椭圆结构参数进行调整,结果表明:当椭圆率为0.6时,纤芯填充乙醇的光子晶体光纤PCF2在波长1.55 nm处相对敏感度可达到72.5067%,同时限制损耗可以降至10-8级。所设计的模型可用于传感和生物传感研究及应用。
A structure and design method of the photonic crystal fiber(PCF)for liquid sensing was proposed.The fiber core region of the hexagonal PCF was designed as two elliptical ventages,which were filled with water and ethanol,respectively,and then the propagation characteristics of two PCF structures were compared.The full vector finite element method(FEM)was adopted to numerically analyze the birefringence,relative sensitivity,confinement loss and nonlinear coefficient of the designed PCF structure.And the parameters of the optical fiber were optimized,meanwhile the parameters of the fiber core elliptical structure were adjusted.The results show that when the ellipticity is 0.6,the relative sensitivity of the PCF2 filled with ethanol can reach to72.5067%at the wavelength of 1.55 nm,and the confinement loss can deduce to the magnitude of 10-8.The designed model can be used in sensing as well as bio-sensing research and their applications.
作者
吴蓉
张璐瑶
严清博
刘振
WU Rong;ZHANG Luyao;YAN Qingbo;LIU Zhen(School of Electronic Information and Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《应用光学》
CAS
CSCD
北大核心
2020年第3期637-644,共8页
Journal of Applied Optics
基金
甘肃省自然科学基金(1610RJZA046)。
关键词
光子晶体光纤
有限元法
高双折射
高非线性
灵敏度
限制损耗
photonic crystal fiber
FEM
high birefringence
high nonlinearity
sensitivity
confinement loss
