宽波段、大模场双包层光子晶体光纤结构设计及性能分析  

Structural design and performance analysis of wide-band and large-mode-field double cladding photonic crystal fiber

作　　者：张云龙 谭芳[1] 解国兴 高斌豪 穆伟 朱先和 陈德孝 ZHANG Yunlong;TAN Fang;XIE Guoxing;GAO Binhao;MU Wei;ZHU Xianhe;CHEN Dexiao(School of Science,Changchun University,Changchun 130022,China)

机构地区：[1]长春大学理学院,吉林长春130022

出　　处：《应用光学》2024年第4期865-872,共8页Journal of Applied Optics

基　　金：中青年科技创新创业卓越人才项目(20210509044RQ);技术开发项目(2023JBH08L05)。

摘　　要：设计了一种独特的双包层光子晶体光纤结构,由外包层的2层圆形空气孔及内包层的2层正八边形空气孔构成,芯材料为稀土掺杂铋的多组分玻璃。采用有限元法结合散射边界条件分析了该结构光子晶体光纤的模场面积、限制损耗、有效折射率、时均功率等特性。结果表明:在波长为1310 nm、1550 nm、1600 nm时对应的模场面积、限制损耗分别为726.5μm^(2)、1.24×10^(-8)dB.km^(-1);731.26μm^(2)、1.32×10^(-8)dB.km^(-1);732.28μm^(2)、1.72×10^(-8)dB.km^(-1)。其中在工作波长1550 nm的时均功率z分量最高可达313 W·m^(-2),可以为高功率激光器的增益介质作参考,为宽波段可调谐激光器提供新的选择。A unique double-cladding photonic crystal fiber structure was designed,consisting of two layers of circular air holes in the outer cladding and two layers of ortho-octagonal air holes in the inner cladding,and the core material was a multi-component glass with rare-earth doped bismuth.The finite element method combined with scattering boundary conditions was used to analyze the mode field area,limiting loss,effective refractive index,time-averaged power and other characteristics of this structure.The results show that the corresponding mode field area and limiting loss at wavelengths of 1310 nm,1550 nm and 1600 nm is 726.5μm^(2),1.24×10^(-8)dB.km^(-1);731.26μm^(2),1.32×10-8 dB.km^(-1);732.28μm^(2),1.72×10^(-8)dB.km^(-1),respectively.The time-averaged power z-component at wavelength of 1550 nm is up to 313 W·m^(-2),which can be used as a reference for gain medium of high-power lasers and provide a new option for wide-band tunable lasers.

关 键 词：光子晶体光纤 高功率 宽波段 模场面积 限制损耗 

分 类 号：TN253[电子电信—物理电子学]