一种具有高二阶非线性椭圆芯中空光纤  

An Elliptical-Core Hollow Fiber with High Second-Order Nonlinearity

作　　者：田凤军[1] 苑立波[1] 刘志海[1] 薄夫森 

机构地区：[1]哈尔滨工程大学理学院光子研究中心,黑龙江哈尔滨150001

出　　处：《光学学报》2012年第1期34-37,共4页Acta Optica Sinica

基　　金：国家自然科学基金(60927008;60877046;61077053;61077062);中央高校基础研究基金(HEUCF20111105)资助课题

摘　　要：提出并制造一种新颖的椭圆芯中空光纤,采用热极化方法使其具有高二阶非线性,可用作相位调制器。该光纤在300℃温度、大于1×108 V/m强电场和9cm有效电极长度条件下热极化30min后,产生大的线性电光相移。基于双椭圆芯中空光纤构建一种纤内马赫-曾德尔干涉仪,通过观察干涉条纹的移动来评估相移,最终得到1.16pm/V的高二阶非线性系数和0.52pm/V的线性电光系数。该技术具有简单、灵活的特点,可以用来制作高电光系数器件,降低制作成本,并能进一步提高全光纤器件的集成度。A novel elliptical-core hollow fiber （ECHF） with high second-order nonlinearity （SON） applied in phase modulator is proposed and fabricated. A large linear electro-optic phase shift observed in the fiber has been induced by thermal poling at about 300℃ for 30 rain with an electric field larger than 1 × 10^8 V/m and a 9-cm-length electrode. Based on ECHF an in-fiber Mach-Zehnder interferometer （MZI） is constructed, movement of interference fringe to estimate phase shift is observed. As high as 1.16 pm/V SON coefficient and 0.52 pm/V linear electro-optic （EO） coefficient are obtained. This technology is simple and versatile that can be utilized to fabricate high EO coefficient devices, which can decrease fabrication cost, and realize higher integration level of all fiber devices.

关 键 词：光纤光学 椭圆芯光纤 二阶非线性 热极化 纤内马赫-曾德尔干涉仪 电光器件 

分 类 号：TN252[电子电信—物理电子学]