大模场Er^(3+)/Yb^(3+)共掺锥形微结构光纤1.5μm激光特性  

1.5μm Laser Properties of Large Mode Field Er^(3+)/Yb^(3+) Co-doped Microstructured Fiber Cone

作　　者：王玲玲 许鹏飞 周德春[2] WANG Ling-ling;XU Peng-fei;ZHOU De-chun(Department of Energy and Power Engineering,Shanxi Institute of Energy,Jinzhong 030600,China;School of Materials Science and Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]山西能源学院能源与动力工程系,山西晋中030600 [2]长春理工大学材料科学与工程学院,吉林长春130022

出　　处：《发光学报》2022年第4期509-517,共9页Chinese Journal of Luminescence

基　　金：吉林省科学技术发展计划重点研发项目(20210203046SF,20200401053GX,20200404163YY)资助。

摘　　要：采用全矢量有限元法设计了一种大模场双包层微结构光纤及锥形波导结构。采用复丝拉制方法制备了成分为45Bi_(2)O_(3)-29GeO_(2)-15Ga_(2)O_(3)-10Na_(2)O-1CeO_(2)的大模场双包层微结构光纤,纤芯直径为70μm,内包层的占空比为0.25,模场面积约为3014.8μm^(2)。采用熔融拉锥技术制备了纤芯直径为17.5μm、有效模场面积为206.47μm^(2)的锥形光纤。在980 nm泵浦下研究了微结构光纤及其锥体的激光特性。结果表明,拉锥后微结构光纤的激发光谱中心波长由1550.2 nm向短波漂移至1546.9 nm,而输出激光光束质量因子M^(2)由3.45±0.03显著减少至1.16±0.01。拉锥前后的斜率效率分别达到10.29%和9.70%。研究结果表明,拉锥可有效改善大模场双包层有序微结构光纤的激光输出模式,拉锥后的激光输出具有良好的单模特性。该项技术研究结果为大模场、高功率的激光光纤材料制备提供了新的技术途径。The waveguide structures of large-mode-field double-cladding microstructured optical fiber and fiber cone were designed by the full vector finite element method.The microstructured optical fiber with the composition of 45Bi_(2)O_(3)-29GeO_(2)-15Ga_(2)O_(3)-10Na_(2)O-1CeO_(2) has been prepared by the cluster drawing method.Moreover,the fiber's core diameter is 70μm,the inner cladding duty cycle is 0.25,and the mode field area is about 3014.8μm^(2).The fiber cone with a core diameter of 17.5μm and an effective mode field area of 206.47μm^(2) was prepared by using the fused biconical taper technology.The laser characteristics of the fiber and its cone were studied under 980 nm LD pumped.The results show that the central wavelength of the excitation spectrum of fiber drifted from 1550.2 nm to 1546.9 nm after tapering.And the output laser beam quality factor M^(2) of fiber and fiber cone decreased significantly from 3.45±0.03 to 1.16±0.01.The slope efficiency of fiber and fiber cone reaches 10.29%and 9.70%,respectively.The results indicate that the taper can effectively improve the laser output mode of microstructured optical fiber,and the laser output of fiber cone has good single model characteristics.Fiber taper technology provides a new approach for preparing large-mode-field and high-power laser fiber materials.

关 键 词：Er^(3+)/Yb^(3+)共掺 微结构光纤光锥 模场 1.5μm激光特性 

分 类 号：TN253[电子电信—物理电子学]