706MHz高重复频率掺镱光纤飞秒激光器  

706 MHz High Repetition Rate Femtosecond Yb-Doped Fiber Laser

作　　者：杜迎生 袁帅[1] 王勇[1] 沈嘉伟 曾和平[1] Du Yingsheng;Yuan Shuai;Wang Yong;Shen Jiawei;Zeng Heping(School of Optoelectronic Information and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《激光与光电子学进展》2021年第9期273-278,共6页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2018YFB0504400,2018YFB0407100)。

摘　　要：利用非线性偏振旋转锁模机理,选用高增益系数的掺镱光纤,设计了两种新型器件("偏振分光器+法拉第旋转器"和波片轴)并搭建了一套超短腔长的锁模光纤激光器,最终实现了重复频率为706 MHz的锁模脉冲输出。在1.5 W的泵浦抽运功率下,激光器锁模后可以达到平均输出功率为260 mW、脉冲宽度为158 fs的激光脉冲。该激光器在锁模情况下,能够在72 h内稳定运行,其结构更有利于小型化和便携化高重复频率系统。We use nonlinear polarization rotation mode-locked mechanism and high-gain-coefficient Ytterbium-doped fiber to design two new devices(polarization splitter+Faraday rotator and wave plate axis)and build a set of ultra-short cavity length mode-locked fiber lasers.And finally,the mode-locked pulse output with repetition rate of 706 MHz is realized.At the pump power of 1.5 W,the mode-locked laser can achieve laser pulse with average output power of 260 mW and pulse duration of 158 fs.The laser can operate stably for 72 h under mode-locked condition,and its structure is more conducive to miniaturization and portability for high repetition frequency systems.

关 键 词：激光器 光纤激光器 非线性偏振旋转 重复频率 增益光纤 

分 类 号：O436[机械工程—光学工程]