Fate of a Soliton in a High Order Spatial Mode of a Multimode Fiber
Fate of a Soliton in a High Order Spatial Mode of a Multimode Fiber
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DOI：
10.1103/physrevlett.122.023901
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发表时间：
2019-01-15
影响因子：
8.6
通讯作者：
Agrawal, G. P.
中科院分区：
文献类型：
--
作者：
Antikainen, A.;Rishoj, L.;Agrawal, G. P.
我们在数值上表明，在某些条件下，对于多模光纤的高阶空间模式中的孤子，噪声引起的孤子自模转换优于孤子自频移。输入孤子的群折射率必须与低阶模式匹配，以实现拉曼增益不可忽略的频率分离，并且此条件决定了由噪声产生的脉冲的波长。这种现象在单模或渐变折射率光纤中没有已知的类似现象。结果表明，即使噪声水平处于基本极限，噪声引起的物理过程也可能优于种子物理过程。
We show numerically that under certain conditions noise-induced soliton self-mode conversion dominates over soliton self-frequency shift for a soliton in a high order spatial mode of a multimode optical fiber. The input soliton has to be group index matched to a lower order mode for a frequency separation for which the Raman gain is non-negligible, and this condition determines the wavelength of the pulse growing from noise. The phenomenon has no known analogs in single-mode or graded-index fibers. The results demonstrate that it is possible for a noise-induced physical process to dominate over a seeded one even for noise levels at the fundamental limit.