We propose and demonstrate an all polarization-maintain fiber (PMF) mode-locked laser based on nonlinear polarization evolution without any splicing angle. In this laser, the complex optimization of the fused splicing angle between PMFs can be avoided and high modulation depth is achieved through using a special polarization beam splitter. By simply adjusting pump power, the environmentally stable dissipative-soliton-resonance pulse train is self-started, which is a challenge for nonlinear-amplifying-loop-mirror systems. Our work has great potential in high-energy pulse source as well as ultrafast and high-repetition-frequency laser source using dispersion compensation and high nonlinear fibers.

我们提出并展示了一种基于非线性偏振演化的全保偏光纤 (PMF) 锁模激光器，没有任何拼接角。在该激光器中，可以避免 PMF 之间熔接角度的复杂优化，并通过使用特殊的偏振分束器实现高调制深度。通过简单地调整泵浦功率，环境稳定的耗散孤子谐振脉冲序列是自启动的，这对非线性放大回路镜系统来说是一个挑战。我们的工作在高能脉冲源以及使用色散补偿和高非线性光纤的超快和高重复频率激光源方面具有巨大的潜力。