On the generation of high-quality Nyquist pulses in mode-locked fiber lasers

Nyquist pulses have wide applications in many areas, from electronics to optics. Mode-locked lasers are ideal platforms to generate such pulses. However, how to generate high-quality Nyquist pulses in mode-locked lasers remains elusive.We address this problem by managing different physical effects in mode-locked fiber lasers through extensive numerical simulations. We find that net dispersion, linear loss, gain and filter shaping can affect the quality of Nyquist pulses significantly. We also de...     

锁模光纤激光器时变动力学

锁模激光器除了可以产生稳定的超短脉冲以外,还可产生一系列重要的非平衡态动力学过程。这些快速变化的动力学过程有助于理解超快激光器和相关非线性系统的动力学,也对超快激光器的稳定性设计有重要指导意义。随着超快探测技术的发展,锁模激光器超快动力学的研究取得了一系列突破。介绍了锁模激光器几个典型的非平衡态动力学过程,包括锁模启动过程,孤子分子动力学,呼吸子超快激光,以及孤子、呼吸子爆炸动力学。这些研究不仅揭示了超快激光器中新的物理机制,也将进一步促进超快激光器、孤子及呼吸子相关理论的发展。