With the recently developed single-shot time-stretch dispersive Fourier transform technique, we investigate the buildup process of an all-polarization-maintaining soliton mode-locked fiber laser. Considering the multi-pulse competitions and the evolution of the survived pulse, we find an optimal range of intra-cavity energy for self-starting related to the saturation energy of the employed saturable absorber. Under the conditions, one dominant pulse can build up quickly against the others, and it finally drives to single-pulse operation. The conclusions drawn here hold for other soliton mode-locked lasers.

中文翻译：

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具有饱和吸收体的孤子锁模光纤激光器自启动的最佳条件

利用最近开发的单次时间拉伸色散傅立叶变换技术，我们研究了保持全偏振的孤子锁模光纤激光器的建立过程。考虑到多脉冲竞争和幸存脉冲的演变，我们找到了与所用可饱和吸收器的饱和能量相关的腔内能量自启动的最佳范围。在这种情况下，一个主脉冲可以快速地对抗其他脉冲，最终驱动到单脉冲操作。这里得出的结论适用于其他孤子锁模激光器。