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13 - Electrical and Electronic Engineering, Metallurgy and Materials
Aston University
Impact of signal-ASE four-wave mixing on the effectiveness of digital back-propagation in 112 Gb/s PM-QPSK systems
This study established that even if such deterministic inter-channel nonlinear interactions are ideally compensated, the system capacity remains restricted by parametric noise amplification. The paper provides both analytical and numerical predictions, and easily calculable hard limits which have yet to be exceeded (even in phase conjugate twin waves which readily cancel inter channel effects - doi:10.1038/nphoton.2013.109 in Nature). The paper has enabled industry to avoid development of multi-channel nonlinear compensators. Also led to research forming Prof Ellis’ contribution to the EPSRC project UNLOC (£4.8M) and the Royal Society Wolfson Research Merit Award (£90k).