基于结构性改变的光子晶体光纤光栅研究  

Photonic Crystal Fiber Grating Based on Structural Change

作　　者：刘燕燕[1] 许成谦[1] 毕卫红[1] 齐跃峰[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《光电工程》2010年第7期70-74,共5页Opto-Electronic Engineering

基　　金：国家重点基础研究发展计划("973"计划)"新型光子晶体光纤传感器的基础研究"(2010CB327801);国家自然科学基金项目"光子晶体光纤熔接过程中关键技术的研究"(60850001)资助项目

摘　　要：利用多极法结合耦合模理论对一种基于结构性改变的光子晶体光纤光栅进行了研究,建立了其结构模型,理论分析了此种成栅工艺原理。计算了七层三角形对称排布空气孔包层有效折射率随波长变化情况,比较了不同光子晶体光纤结构成栅效果的差异。研究结果表明,光子晶体光纤包层中空气孔周期性塌缩可以形成光栅,空气孔排布层数、空气孔占空比、空气孔塌缩层数和塌缩程度等参数对光子晶体光纤光栅的传输特性有重要影响,得出了谐振波长和谐振带宽与上述参数之间的变化关系,并给出这种变化关系的解释。A kind of photonic crystal fiber grating based on structural change was studied by using the multipole method and the coupled mode theory,the structure model was built,and the principle was analyzed.The effective refractive indexes of the cladding with seven rings of the hexagonal symmetry air-holes varying with the wavelength were computed.Moreover,the performance differences of the gratings fabricated by the different photonic crystal fibers were compared.It was shown that the periodic air-holes shrinkage could form grating,and the number of rings of the air-holes in the cladding,the duty ratio of the air-holes,the number of rings of the air-holes shrinkage and the extent of the air-holes shrinkage had the important impact on the transmission characteristics of the photonic crystal fiber grating.Furthermore,the functional relationships that the resonance wavelength and bandwidth varied with these parameters were obtained and the rational explanations were given.

关 键 词：光子晶体光纤 光子晶体光纤光栅 多极法 耦合模理论 反射谱 

分 类 号：TN253[电子电信—物理电子学]