Opt Express. 2023 Feb 13;31(4):7023-7031. doi: 10.1364/OE.484204.
Due to the fascinating features, pulsating solitons attract much attention in the field of nonlinear soliton dynamics and ultrafast lasers. So far, most of the investigations on pulsating soliton are conducted in Er-doped fiber lasers. In this work, we reported the periodic transition between two evolving pulsating soliton states in an Yb-doped fiber laser. By using the real-time measurement techniques, the spectral and temporal characteristics of this transition state were investigated. Two evolving soliton pulsation states have similar evolution process, i.e., from pulsating towards quasi-stable mode-locked states. However, the details of the two processes are different, such as the pulse energy levels, pulsating modulation depths, duration of quasi-stable mode-locked states. The transition between two evolving soliton pulsation states could be attributed to the interaction of the polarizer and the varying polarization states of the pulse inside the laser cavity. The experimental results will contribute to the further understanding of soliton pulsating dynamics in dissipative optical systems.
由于其迷人的特性，脉冲孤子在非线性孤子动力学和超快激光器领域引起了广泛关注。迄今为止，大多数关于脉冲孤子的研究都是在掺铒光纤激光器中进行的。在这项工作中，我们报道了掺镱光纤激光器中两种演化的脉冲孤子状态之间的周期性转变。通过使用实时测量技术，研究了该转变状态的光谱和时域特性。这两种演化的孤子脉冲状态具有相似的演化过程，即从脉冲向准稳定锁模状态演化。然而，这两个过程的细节是不同的，例如脉冲的能量水平、脉冲调制深度、准稳定锁模状态的持续时间。两种演化的孤子脉冲状态之间的转变可以归因于腔内偏振器和脉冲偏振态的变化之间的相互作用。实验结果将有助于进一步理解耗散光学系统中的孤子脉冲动力学。
