一种基于结构性改变的光子晶体光纤光栅理论研究  

Theroretical Study on a Kind of Photonic Crystal Fiber Grating Based on Structural Change

作　　者：齐跃峰[1,2] 毕卫红[1,2] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004 [2]河北省特种光纤与光纤传感重点实验室,河北秦皇岛066004

出　　处：《光学学报》2011年第1期54-59,共6页Acta Optica Sinica

基　　金：国家973计划(2010CB327801);国家自然科学基金(60850001);河北省自然科学基金(F2010001286)资助课题

摘　　要：对一种新型基于结构性改变的光子晶体光纤光栅原理进行了研究。采用多极法分析了结构性改变对折射率的影响,得到有效折射率与包层气孔塌缩之间的关系,建立了结构性改变光子晶体光纤光栅模型。利用耦合模理论对所成光栅性能进行了分析,重点研究了包层空气孔层数、空气孔占空比、气孔塌缩程度对光栅谐振波长、带宽的影响。研究结果表明,光子晶体光纤包层空气孔周期性塌缩可以形成光栅;空气孔塌缩程度和塌缩包络对有效折射率的大小和分布都有影响;空气孔层数增加,光栅谐振波长出现蓝移,带宽变宽,谐振强度减弱;相同光纤结构下,空气孔塌缩程度增加,光栅谐振波长出现红移,谐振带宽变窄。A kind of novel photonic crystal fiber grating based on structural change is researched.The influence of refractive index brought by structural change is studied by using multipole method.The relation between effective refractive index and collapsed cladding pillars is gotten.The model of structural changed photonic crystal fiber grating is built.Furthermore,the influence of cladding layers of pillars and the degree of collapsed pillars are discussed.It is shown that periodic collapsed pillars can form grating,and that not only the extent of collapsed pillars,but also the collapse envelope has influence on the magnitude and distribution of effective refractive index.As the layers of pillars increase,the resonant wavelength shows blue shift,the grating has wider bandwidth and weaker resonance intensity.Under the same fiber structure,resonant wavelength shows red shift and grating has narrower bandwidth with increasing the extent of collapsed pillars.

关 键 词：光纤光学 光子晶体光纤 光纤光栅 结构性改变 有效折射率 

分 类 号：TN253[电子电信—物理电子学]