期刊
OPTICS EXPRESS
卷 30, 期 22, 页码 40101-40119出版社
Optica Publishing Group
DOI: 10.1364/OE.459381
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资金
- Universita degli Studi di Padova [SEED -BIRD2020]
- Ministero dell'Istruzione, dell'Universita e della Ricerca (Departments of Excellence) [law 498 232/2016, PRIN 2017HP5KH7_003 - FIRST]
The equations describing light propagation in a few-mode fiber for space-division multiplexing are derived, considering linear mode coupling and both Kerr- and Raman-induced nonlinearity. The effect of fiber imperfections on the gain of a forward-pumped Raman-amplified link is assessed through numerical simulations, taking into account physical models of stress birefringence and core ellipticity. The study evaluates the average gain and the variation of signal power at the output of the amplified fiber span for different levels of coupling strength in fibers supporting 2 and 4 groups of LP modes, and identifies three main propagation regimes as well as assesses the effect of coupling between different groups of degenerate modes.
The equations describing light propagation in a few-mode fiber for space-division multiplexing are derived under the presence of linear mode coupling and both Kerr-and Raman -induced nonlinearity. By considering physical models of stress birefringence and core ellipticity, the effect of such fiber imperfections on the gain of a forward-pumped Raman-amplified link is assessed through numerical simulations. The average gain and the variation of signal power at the output of the amplified fiber span is numerically evaluated for different levels of coupling strength in fibers supporting 2 and 4 groups of LP modes, identifying three main propagation regimes and assessing the effect of coupling between different groups of degenerate modes.
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