基于反抛物线型光纤的TE01和TM01模式输出激光器  

Anti-Parabolic-Fiber-Based Laser with TE01 and TM01 Mode Output

作　　者：刘儒雅 汤敏 曹敏 芈月安 简伟[1] 任国斌[1] Liu Ruya;Tang Min;Cao Min;Mi Yuean;Jian Wei;Ren Guobin(Key Laboratory of All Optical Network & Advanced Telecom tn unication Network of Ministry of Education ,Institute of Lightwave Technology , Beijing Jiaotong University , Beijing 100044, China)

机构地区：[1]北京交通大学全光网及现代通信网教育部重点实验室光波技术研究所

出　　处：《中国激光》2019年第5期300-306,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61275092)

摘　　要：提出一种反抛物线型掺铒光纤,该光纤可以实现二阶模式组中简并矢量模式的有效分离。将其作为光纤激光器的增益介质,采用数值方法分析光纤中铒离子掺杂分布、铒离子掺杂浓度、光纤长度和抽运光功率对掺铒光纤激光器输出模式的影响。通过在光纤不同环形区域内掺杂铒离子,可以实现TE01模式或TM01模式的单独输出,并且激光器的斜率效率分别高达67.4%和63.5%,输出模式纯度分别高达99.97%和99.99%。所提的基于反抛物线型掺铒光纤的激光器具有斜率效率高、输出模式纯度高的优势,该光纤激光器可应用于高功率激光器、光纤通信和光纤传感等领域。An anti-parabolic erbium-doped fiber is proposed to effectively separate the degenerate vector modes in the second-order mode group. The proposed fiber is used as the gain medium of a laser, and the effects of erbium-dopant distribution, erbium-dopant concentration, fiber length, and pump power upon the output mode of the erbium-doped fiber laser are analyzed through numerical investigation. The TE01 or TM01 modes are obtained separately by doping erbium in different annular regions of the proposed fiber, and the slope efficiencies of the proposed fiber laser can reach 67.4% and 63.5%, with an output-mode purity reaching 99.97% and 99.99%, respectively. The proposed anti-parabolic-fiber-based erbium-doped laser has the merits of a high slope efficiency and high mode purity, and has many applications such as in high power lasers, optical-fiber communications, and optical-fiber sensing systems.

关 键 词：激光器 光纤激光器 掺杂分布 斜率效率 模式纯度 

分 类 号：TN248[电子电信—物理电子学]