双包层光子晶体光纤热效应及其影响分析  

Analysis of thermal effect and its impact of double-cladding photonic crystal fiber

作　　者：巩玲仙 郭红英 王春灿[2] 任国凤 GONG Ling-xian;GUO Hong-ying;WANG Chun-can;REN Guo-feng(Department of Electronics,Xinzhou Teachers University,Xinzhou Shanxi,034000China;Institute of Lightwave Technology,Beijing Jiaotong University,Beijing,100094China)

机构地区：[1]忻州师范学院电子系,山西忻州034000 [2]北京交通大学光波技术研究所,北京100094

出　　处：《光电子．激光》2020年第12期1253-1261,共9页Journal of Optoelectronics·Laser

基　　金：山西省教学改革项目“虚拟仿真技术融入传感检测类课程混合式教学模式的探索与实践(J2020282)”;山西省教育科学规划课题“基于大数据背景下的通信工程专业创新人才培养模式研究(GH-17060)”;忻州师范学院科研项目“新型结构的大模场多芯光纤的研究(2019KY05)”资助项目。

摘　　要：本文对双包层光子晶体光纤热效应及其模式特性的影响进行了深入的分析和研究,采用有限元方法构建了双包层光子晶体光纤的多物理场耦合模型。建立了双包层光子晶体光纤截面的热传导方程,分别研究了双包层光子晶体光纤径向温度分布与光纤结构参数、换热条件和热负载的关系。进一步地研究了热效应对光纤基模的有效折射率、有效模场面积和模场分布的影响。双包层光子晶体光纤的径向温度分布与其结构参数紧密相关。最高温度位于纤芯的中心,并且随着空气孔比例的增加而增大。同时纤芯的温度随着换热系数和热负载的降低而降低。光纤的温度梯度随着换热系数和热负载的增加而线性增加。热效应同样影响光纤基模场的分布。热负载从10 W/m增加到30 W/m时,基模有效折射率逐渐增加,基模的有效面积线性降低。并且波长越短,基模场收缩越明显,热效应越严重。The thermal effect and its impact on mode property of double-cladding photonic crystal fiber(DC-PCF)have been analyzed in this paper.The equations of heat conduction for the DC-PCF cross-section is given and applied to study the thermal effect.The relationship between the radial temperature distribution of the DC-PCF and its structural parameters,heat transfer conditions and thermal load are respectively studied.The impact of the thermal effect on the effective refractive index of fundamental mode,effective mode field area and the mode field distribution are further given.It′s found that the radial temperature distribution is closely related to the structural parameters of DC-PCF.The highest temperature occurs at the fiber core,which increases as the air hole ratio increases.Besides,the temperature of the core decreases as both the heat transfer coefficient and thermal load decrease.The temperature gradient increases linearly as the heat transfer coefficient and thermal load increase.The thermal effect also has impact on the mode field distribution.As the thermal load increase from 10 W/m to 30 W/m,the effective refractive index of the fundamental mode increases,the effective area of the fundamental mode linearly decreases,and the shorter the wavelength,the more obvious the fundamental mode field shrinks,and the more significant the thermal effect is.

关 键 词：光子晶体光纤 热效应 有限元方法 

分 类 号：TN929.11[电子电信—通信与信息系统]