Rogue waves in mode-locked fiber lasers
Rogue waves in mode-locked fiber lasers
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DOI：
10.1103/physreva.85.013828
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发表时间：
2012-01
影响因子：
2.9
通讯作者：
A. Zaviyalov;O. Egorov;R. Iliew;F. Lederer
中科院分区：
文献类型：
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作者：
A. Zaviyalov;O. Egorov;R. Iliew;F. Lederer
我们报告了耗散系统（即锁模光纤激光器）中光流氓波的理论观察。这些异常波是峰值功率巨大的脉冲，可能会混乱地出现在激光器中。它们存在于正常色散状态，并且表现出的峰值功率超过稳定耗散孤子的 13 倍。它们的高度超过所谓的有效波高 6 倍。可以通过改变激光增益来改变异常波的峰值功率。这些异常波是由该耗散系统中腔内光的特殊非线性聚焦过程产生的噪声而产生的，不需要任何特定的初始条件。此外，我们还确定了增益饱和对聚焦过程的关键影响，从而对异常波的峰值幅度产生关键影响。与海洋中的异常事件类似，激光异常脉冲也伴随着移动暗孤子的空穴。
We report on the theoretical observation of optical rogue waves in a dissipative system, namely, a mode-locked fiber laser. These rogue waves are pulses of huge peak power which may chaotically appear in the laser. They exist in the normal dispersion regime and exhibit peak powers exceeding those of stable dissipative solitons by a factor of 13. Their height exceeds the so-called significant wave height by a factor of 6. The peak power of the rogue waves can be changed by varying the laser gain. These rogue waves arise from noise by a peculiar nonlinear focusing process of the intracavity light in this dissipative system without requiring any specific initial conditions. Moreover, we identify the crucial effect of gain saturation on the focusing process and, consequently, on the peak amplitude of rogue waves. Similar to rogue events in the ocean, the laser rogue pulses are also accompanied by holes which are moving dark solitons.