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Fate of a Soliton in a High Order Spatial Mode of a Multimode Fiber
A Antikainen1, L Rishøj2, B Tai2
1The Institute of Optics, University of Rochester, Rochester, New York 14627, USA.
Abstract:
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.
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