An all-fiber mode-locked laser based on Mamyshev mechanism operating at 1550 nm is demonstrated. Self-phase modulation and offset spectral filtering provide high peak-power pulse selection in the laser cavity and induce mode locking. With selected operating parameters, the all-fiber mode-locked laser easily achieves mode locking without external seed pulses or auxiliary starting arms, making the laser convenient to operate. Pulses with maximum energy ∼18 nJ and width 230 fs are obtained. Pulse width is almost unchanged with increasing pump power, while pulse energy increases linearly. Starting of the mode-locked laser based on Mamyshev mechanism and output spectra with different pump powers are experimentally investigated.

中文翻译：

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基于Mamyshev机制的1550nm高能脉冲自启动全光纤锁模激光器

展示了一种基于 Mamyshev 机制的全光纤锁模激光器，工作波长为 1550 nm。自相位调制和偏移光谱滤波在激光腔中提供高峰值功率脉冲选择并引起锁模。选择工作参数后，全光纤锁模激光器轻松实现锁模，无需外部种子脉冲或辅助启动臂，操作方便。获得了最大能量为~18 nJ 和宽度为 230 fs 的脉冲。随着泵浦功率的增加，脉冲宽度几乎没有变化，而脉冲能量线性增加。实验研究了基于Mamyshev机制的锁模激光器的启动和不同泵浦功率的输出光谱。