含负折射率材料空芯Bragg光纤的束缚损耗特性  

Bandage loss of Bragg fiber with negative-index materials

作　　者：高伟霞[1] 孙长伟[2] 于荣金[3] 高海涛[1] 

机构地区：[1]安徽科技学院数理与信息工程学院,安徽凤阳233100 [2]蚌埠学院机械与电子工程系,安徽蚌埠233000 [3]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《光学技术》2016年第2期103-107,共5页Optical Technique

基　　金：安徽科技学院引进人才项目(SRC2014444);安徽省高等学校省级自然科学研究项目(KJ2013Z201)

摘　　要：将负折射率材料引入到空芯Bragg光纤包层中,形成具有正负折射率介质层交替的空芯Bragg光纤,运用传输矩阵理论对该Bragg光纤的束缚损耗特性进行分析和计算,并与传统的全正折射率介质层Bragg光纤的束缚损耗进行对比。结果发现:在最低损耗方面含负折射率材料的空芯Bragg光纤没有表现出任何优势,但在最低损耗点附近的损耗小于全正折射率介质层Bragg光纤,损耗曲线比较平滑,并且传输波长范围较宽;当空气作为一个介质层的材料时,两种Bragg光纤的束缚损耗特性几乎一致;当减小包层折射率对比时出现了与全正折射率介质层Bragg光纤不同的现象,损耗曲线变的更为平滑,说明传输波长范围变宽了。The radiation loss of Bragg fiber, which cladding is composed of cylindrical dielectric layers with alterna- ting positive and negative refractive indices, is analyzed and calculated by asymptotic matrix method. The results find that the least radiation loss of such fibers is same to general Bragg fibers＇. But it is less than general Bragg fibers＇ at the wavelength which nearby the least loss wavelength. And the radiation loss curves are smoother and wider than general Bragg fibers＇. But there is an exception, when air is one materials of cladding in such fibers and general Bragg fibers＇, the radiation loss of such fibers is almost same to general Bragg fibers＇.

关 键 词：导波光学 负折射率 BRAGG光纤 束缚损耗 

分 类 号：TN25[电子电信—物理电子学]