In this work we study experimentally the temporal dynamics of an all-normal dispersion all-fiber ring laser far from stable mode locking. Temporal mapping relying on segmented memory capabilities of a fast oscilloscope is used for this purpose. A regime is found where radiation fills the cavity and is characterized by peaks that successively emerge, grow in amplitude while compressing temporally, before decaying abruptly, and localized low-intensity components mediating their interactions across the cycles. The highest-amplitude peaks ephemerally dominate intracavity radiation, before being superseded by other emerging peaks. As radiation covers the whole period and no permanent pulse ever emerges, the regime can be viewed as an intermediate stage between continuous-wave and mode locking operations. The interest of using segmented memory possibilities for proper characterization of this unconventional regime is highlighted.

中文翻译：

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全普通色散掺tter光纤环形激光器的初始锁模动力学

在这项工作中，我们实验性地研究了远离稳态锁模的全法向色散全光纤环形激光器的时间动态。为此，需要使用依赖快速示波器的分段存储功能的时间映射。找到了一种机制，在该机制中，辐射充满了空腔，其特征是连续出现的峰值，幅度增大的同时临时压缩，突然衰减之前的振幅，以及局部的低强度分量，这些分量在整个周期中相互作用。幅值最高的峰短暂地占据了腔内辐射，然后被其他新兴峰所取代。由于辐射覆盖了整个周期，并且从未出现过永久性脉冲，因此该状态可以视为连续波和锁模操作之间的中间阶段。