注入噪声对光纤激光器锁模启动的影响  

Impact of injection noise on locked starting of fiber lasers

作　　者：李喆[1] 张伟[1] 赵卫[1] 陈国夫[1] 王屹山[1] 

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室

出　　处：《强激光与粒子束》2007年第11期1807-1811,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(60537060)

摘　　要：从掺镱光纤激光器腔内的激光场出发，讨论了掺镱光纤激光器腔内的噪声信号对锁模启动的影响，并针对我们设计的8字腔超短脉冲光纤激光器进行了研究。通过对激光器腔内锁模过程的分析发现：在泵浦功率为214．75mw时，自行研制的8字形腔掺Yb^3＋光纤激光器在未注入噪声信号时，输出端在30～50S内获得稳定的锁模脉冲激光输出；在腔内注入脉宽30ns，频率10kHz．平均功率0．2mw的脉冲噪声后．输出端在1～2S内获得同样稳定的锁模脉冲激光输出。实验结果表明．注入激光器谐振腔内一定的噪声信号，可加速锁模的启动。It is reported that the mode-locking starting is achieved more quicker by injecting pulses noise into figure-of-eight Yb^3＋-doped fiber laser. A detailed investigation about this phenomenon is presented in this paper. Analyzing the process of the mode-locking in the cavity, we discover the noise in the cavity does affect the mode-locking starting process of the fiber laser. During the experiment, when the pump power is 214.75 mW, the figure-of-eight Yb^3＋-doped fiber laser without injecting noise can generate locked-pulse in 30-50 seconds; while the pulses with duration of 30 ns, 10 kHz repetition frequency, and 0.2 mW is injected into the cavity, the fiber laser can generate locked-pulse in 1-2 seconds.

关 键 词：激光技术 注入锁模 8字形腔 光纤激光器 掺YB^3+光纤 

分 类 号：TN248.1[电子电信—物理电子学]