Mitigation of coherent nonlinear noise accumulation in transmission across cascaded SOAs

• DOI: 10.1364/ofc.2025.w1k.8
• Publication Date: 2025-06-03T14:57:10Z
• Authors: Hartmut Hafermann; Loig Godard; Xiaohui Zhao; Abel Lorences-Riesgo; Zhenzhen Zhang; Romain Brenot; Yann Frignac; Gabriel Charlet

It is shown experimentally and in simulations that nonlinear noise of cascaded semiconductor optical amplifiers accumulates coherently. Noise correlations degrade nonlinear SNR by up to 3 dB. They are found negligible after few kilometers of fiber and are reduced by up to 2 dB through polarization mixing.