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Nonlinear effects in few-mode fibers (FMF) have been explored in the early years of optical communication. Due to the development of space-division multiplexing (SDM) technology for fiber transmission in FMF, the nonlinearity in FMF has attracted significant research interests recently. Analogous to single-mode fiber, nonlinear effects may eventually limit the information capacity in FMF transmission...
Analogous to single-mode fiber, nonlinear effects may eventually limit the information capacity in next generation long-haul few-mode fiber (FMF) transmission systems. In this paper, we theoretically and numerically investigate inter-modal four-wave mixing (IM-FWM) among up to four spatial modes in FMFs. Different forms of multi-mode non-linear Schrödinger equation (MM-NLSE) for two, three and four...
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