Ultrabroadband, few-cycle pulses directly from a Mamyshev fiber oscillator
Ultrabroadband, few-cycle pulses directly from a Mamyshev fiber oscillator
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DOI：
10.1364/prj.8.000065
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发表时间：
2020-01-01
影响因子：
7.6
通讯作者：
Chong, Andy
中科院分区：
文献类型：
--
作者：
Ma, Chunyang;Khanolkar, Ankita;Chong, Andy
虽然锁模光纤激光器的性能有了很大的提高，但有限的增益带宽限制了它们产生接近几个周期甚至更短的超短脉冲。在这里，我们提出了一种新的方法，通过在腔中插入高度非线性的光子晶体光纤和色散延迟线，从Mamyshev振荡器配置中获得具有超远光谱（类似于400 nm， -20 dB）的少周期脉冲（类似于5周期）。由于增益光纤中的非线性吸引子和马米舍夫振荡器的“完美”饱和吸收作用，自相似演化的独特非线性过程可以稳定腔内谱增宽。据我们所知，这是由光纤激光器直接产生的最短脉冲宽度和最宽光谱。(C) 2019中国激光出版社
While the performance of mode-locked fiber lasers has been improved significantly, the limited gain bandwidth restricts them from generating ultrashort pulses approaching a few cycles or even shorter. Here we present a novel method to achieve few-cycle pulses ( similar to 5 cycles) with an ultrabroad spectrum (similar to 400 nm at -20 dB) from a Mamyshev oscillator configuration by inserting a highly nonlinear photonic crystal fiber and a dispersion delay line into the cavity. A dramatic intracavity spectral broadening can be stabilized by the unique nonlinear processes of a self-similar evolution as a nonlinear attractor in the gain fiber and a "perfect" saturable absorber action of the Mamyshev oscillator. To the best of our knowledge, this is the shortest pulse width and broadest spectrum directly generated from a fiber laser. (C) 2019 Chinese Laser Press