报道了利用非线性光纤环形镜(NOLM)锁模运行的掺Yb3+光纤激光器的实验研究。获得了脉冲宽度234 ps,中心波长1053 nm的锁模脉冲激光输出,光谱带宽6 nm,输出功率2.05 mW,重复频率3.842 MHz。该锁模光纤激光器的工作中心波长可在1030～1081 nm范围内调谐,锁模过程可以完全自启动,几乎不受外界环境变化的影响,可长时间稳定锁模工作,完全可以作为微焦耳级单脉冲能量光纤激光放大系统前端种子源使用,而且有望成为其他科学研究工作的中心波长可调谐的宽带锁模光纤激光光源。

The experimental study of Yb3+-doped fiber lasers using the nonlinear optical loop mirror (NOLM) for mode-locked operating is reported in this paper. The fiber laser can generate 2.05 mW average power of 234 ps pulse duration at a repetition rate of 3.842 MHz, and operating center wavelength is 1053 nm, spectrum width is about 6 nm. The operating center wavelength can be tuned from 1030 nm to 1081 nm, the self-starting of the mode-locked fiber laser can be achieved easily, and the mode-locked operation can be hardly influenced by the environment disturbance in days. It can be used for a seed in the high energy mode-locked fiber laser system successfully, furthermore, it can be applied in science and engineering as a center wavelength-tunable mode-locked fiber laser hopefully.