中红外大模场单模全固态硫系光子晶体光纤  

Mid⁃Infrared Large Mode Area Single⁃Mode All⁃Solid⁃State Photonic Crystal Fiber Based on Chalcogenide Glass

作　　者：李宁哲 贾金升 张敏 王煜泽 肖峰 黄庆 白胜闯 Vladimir Shiryaev 戴世勋[1,2] 聂秋华 王训四[1,2,4] Li Ningzhe;Jia Jinsheng;Zhang Min;Wang Yuze;Xiao Feng;Huang Qing;Bai Shengchuang;Shiryaev Vladimir;Dai Shixun;Nie Qiuhua;Wang Xunsi(Laboratory of Infrared Materials and Devices,Research Institute of Advanced Technology,Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,Zhejiang,China;Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province,Ningbo 315211,Zhejiang,China;Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences,Nizhny Novgorod 603951,Russia;Ningbo Institute of Oceanography,Ningbo 315832,Zhejiang,China)

机构地区：[1]宁波大学信息科学与工程学院高等技术研究院红外材料与器件实验室,浙江宁波315211 [2]浙江省光电探测材料及器件重点实验室,浙江宁波315211 [3]俄罗斯科学院高纯物质化学研究所,俄罗斯下诺夫哥罗德603951 [4]宁波海洋研究院,浙江宁波315832

出　　处：《中国激光》2024年第17期240-248,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(U22A2085,62205163,61875097,61935006);浙江省杰出自然科学基金(LY20F050010,LQ21F050005);宁波市自然科学基金(2021J076);宁波市领军拔尖人才培养项目;王宽诚幸福基金。

摘　　要：针对当前硫系光纤难以同时实现高功率传输与高光束质量的问题,通过COMSOL软件仿真模拟光纤性质,设计出了满足单模传输需要且具有大模场面积的光子晶体光纤(PCF)的结构参数。所设计的光纤在1.5~10μm的波长范围内满足高阶模(LP_(11))与基模(LP_(01))的限制损耗比大于10~2的单模条件,且光纤基模的有效模面积在波长2μm处约为5362μm^(2)。根据仿真模拟的结构参数,探索出新型动、静态蒸馏相结合的技术,制备出高纯硫系玻璃,结合新型的挤压-堆积法,制备出基于全硫系玻璃的全固态大模场单模光子晶体光纤。该光纤在波长1.55μm处的近高斯光能量分布特征验证了其单模特性;同时在弯曲半径为14 cm的1.5 m长的光纤中观察到低弯曲损耗为1 dB,与仿真结果基本一致,表明此全固态光子晶体光纤具有出色的单模传输和抗弯性能,在中红外高能激光传输方面具备一定的应用潜能。Objective Photonic crystal fiber(PCF)has a variety of unique optical properties,such as single-mode transmission in all wavelength ranges,large effective mode area,high nonlinearity,and dispersion control,which make it have a wide range of applications.The transmission ability of a traditional PCF is restricted by air core collapse and structured cladding deformation during optical fiber fabrication.The all-solid-state structure can solve the problems of air hole collapse and cladding deformation of traditional PCF.The large mode area(LMA)PCF can solve the nonlinear effects such as four-wave mixing and Brillouin scattering caused by the small mode field area of the traditional PCF.Therefore,large mode area single-mode all-solid-state PCF is a good carrier for high-power fiber lasers and amplifiers and the only effective way to improve the power processing capability of chalcogenide fibers while maintaining beam quality.In this study,a large mode area single-mode all-solid-state chalcogenide PCF is prepared by extrusion-stacking method,which solves the problem that traditional fibers could not achieve high power transmission and high beam quality at the same time.Methods In this study,we first establish a theoretical model for large mode area single-mode all-solid-state chalcogenide PCF.Mid-infrared chalcogenide glass Ge_(10)As_(22)Se_(68) and As_(2)S_(3) are chosen as high and low refractive index materials.The fiber is prepared by extrusion-stacking method.Firstly,the two materials are extruded into rods,and then the rods are stacked according to the theoretical model to obtain preforms.Finally,the preform is drawn into fiber.The cross section,mode area,near-field energy distribution,fiber loss and bending loss of the fiber are calculated and analyzed.Results and Discussions According to the simulation results,the optimal structural parameters of large mode area single-mode all-solid-state chalcogenide PCFs are obtained.The experimental results show that large mode area single-mode chalcogenide PCF can simultane

关 键 词：光纤光学 中红外 全固态光子晶体光纤 硫系玻璃 大模场面积 单模传输 

分 类 号：TN253[电子电信—物理电子学]