掺锗芯光子晶体光纤和普通单模光纤的低损耗熔接  

Low Loss Fusion Splicing of Germanium Doped Core Photonic Crystal Fiber and Standard Single Mode Fiber

作　　者：李宏雷[1] 娄淑琴[1] 郭铁英[1] 王立文[1] 陈卫国[1] 简水生[1] 

机构地区：[1]北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室,北京100044

出　　处：《中国激光》2010年第6期1589-1593,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(60777033);教育部重点项目(308002)资助课题

摘　　要：基于全矢量有限元法,在1550 nm波段对掺锗芯光子晶体光纤(PCF)与普通单模光纤(SMF)的熔接损耗进行了理论分析,指出模场失配是造成两者熔接损耗大的最主要因素;进而提取自制的光子晶体光纤实际截面数据,更准确地估计出由模场失配引入的熔接损耗。采用电弧放电熔接技术,通过反复实验给出了一组优化的熔接参数,并根据自制的光子晶体光纤具有掺锗芯子而采用重焊操作使得包层孔适量缩塌,可以有效地减小两种光纤的模场失配进而降低了熔接损耗,实现了光子晶体光纤和普通单模光纤的低损耗熔接。The principles of the splice loss between the germanium doped core photonic crystal fiber（PCF） and single mode fiber（SMF） at the wavelength of 1550 nm are investigated by the full-vector finite element method.The mismatch of mode field between the PCF and SMF is the main factor resulting in the high splice loss.The real structure profile is extracted to exactly simulate the splice loss due to the mismatch of mode field.Based on the arc fusion technique,a set of optimized fusion parameters are obtained from a series of experiments,and the repeat-discharge operation are used to make sure moderate collapse of the cladding air holes of the germanium doped core PCF.Then the mismatch of mode field could be reduced and the low loss splicing between PCF and SMF is realized.

关 键 词：光纤光学 光子晶体光纤 电弧熔接 有限元法 模场半径 

分 类 号：TN929.11[电子电信—通信与信息系统]