作　　者： (吕健滔）; (王春明）; (朱晟昦）; (刘海）;

机构地区： 佛山科学技术学院物理与光电工程学院,广东佛山528000 华中科技大学材料科学与工程学院,湖北武汉430074

出　　处： 《光学学报》 2017年第8期329-335,共7页

摘　　要： 基于表面等离子体共振(SPR)效应,设计了一种采用双芯结构光子晶体光纤(PCF)作为光波导的横向应力传感器。通过建立SPR耦合波模型和PCF结构的形变模型,利用全矢量有限元法进行数值模拟,获得了基模共振峰的偏移量与横向应力的关系。结果表明共振峰波长的偏移量与所施加应力具有很好的线性关系。对PCF的截面结构进行优化设计,通过选择适当的空气孔层数、直径和周期,可获得较高的测量灵敏度。该研究可为基于SPR的PCF横向应力传感器的设计提供理论依据。 A new kind of transverse-stress sensor which uses photonic crystal fiber（PCF）with dual-core structure as an optical waveguide is designed based on the surface plasmon resonance（SPR）effect.The relationship between the shift of the fundamental mode resonance peak and the transverse-stress is obtained when we build the model of the SPR coupled wave and the deformation model of the PCF structure by the vector finite element method.Results show that the wavelength shift of the resonance peak is linear with the added stress.A high measurement sensitivity is obtained when the optimal design for the cross section structure of PCF,and the number of layers,the diameter and the period of air holes are selected.This study can provide theoretical guidance for the design of PCF transversestress sensor based on SPR.

关 键 词： 传感器 表面等离子体共振 光子晶体光纤 应力