We report an ultra-low repetition rate self-started mode-locked fiber laser at 1.55 µm spectral region with a sub-20 ps pulse duration at repetition rate of less than 100 kHz leading to high energy and peak power pulses. A repetition rate of 13.8 kHz with the pulsewidth of 17 ps is then achieved and the issue of multiple pulses is mitigated in the linear cavity structure by proper selection of semiconductor saturable absorber and dispersion management in the cavity. A broad supercontinuum achieved using 7 m SM-ZBLAN fiber while pumping with mode-locked fiber laser with repetition rate, pulsewidth, pulse energy and peak power of 53 kHz, 12.5 ps, 16.6 µJ and 1.3 MW, respectively.

中文翻译：

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全光纤 sub-20 ps 超低重复率高峰值功率锁模光纤激光器产生超连续谱

我们报告了一种超低重复率自启动锁模光纤激光器，其光谱区域为 1.55 µm，脉冲持续时间低于 20 ps，重复率低于 100 kHz，可产生高能量和峰值功率脉冲。A repetition rate of 13.8 kHz with the pulsewidth of 17 ps is then achieved and the issue of multiple pulses is mitigated in the linear cavity structure by proper selection of semiconductor saturable absorber and dispersion management in the cavity. 使用 7 m SM-ZBLAN 光纤实现宽超连续谱，同时使用锁模光纤激光器进行泵浦，重复率、脉冲宽度、脉冲能量和峰值功率分别为 53 kHz、12.5 ps、16.6 µJ 和 1.3 MW。