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In this paper, an analytical model of the nonlinear inter-core crosstalk (NICXT) for real weakly coupled MCFs is derived initially basing on the coupled-mode theory (CMT) with bending and twisting perturbations. Novel linear power-coupling coefficient (LPCC) and nonlinear power-coupling coefficient (NPCC) are derived for the modified coupled-power equations (CPEs) by using the split step Fourier method (SSFM) and perturbation method (PM). Numerical simulations are carried out based on various parameter configurations for the MCFs transmission system considered. Our researches indicate that the fiber nonlinearity will reduce the phase-matching points (PMPs) effectively under the condition of a high optical power. The theoretical simulation results agree well with the experimental results.
Hongfeng Pan,Shulin Jin, andLian Xiang
"Analysis of nonlinear crosstalk suppression in weakly multi-core fiber based on coupled-power theory", Proc. SPIE 12066, AOPC 2021: Micro-optics and MOEMS, 1206604 (24 November 2021); https://doi.org/10.1117/12.2601923
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Hongfeng Pan, Shulin Jin, Lian Xiang, "Analysis of nonlinear crosstalk suppression in weakly multi-core fiber based on coupled-power theory," Proc. SPIE 12066, AOPC 2021: Micro-optics and MOEMS, 1206604 (24 November 2021); https://doi.org/10.1117/12.2601923