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
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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214.75 mW时，自行研制的8字形腔掺Yb3+光纤激光器在未注入噪声信号时，输出端在30～50 s内获得稳定的锁模脉冲激光输出；在腔内注入脉宽30 ns，频率10 kHz，平均功率0.2 mW的脉冲噪声后，输出端在1~2 s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。Abstract: It is reported that the mode-locking starting is achieved more quicker by injecting pulses noise into figure-of-eight Yb3+-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 Yb3+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.
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Key words:
- laser technology /
- injection locking /
- figure-of-eight laser cavity /
- fiber lasers /
- yb3+-doped fiber
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