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Updated: Oct 17, 2025
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Published on: October 17, 2010
Raman Amplification Optimization in Short-Reach High Data Rate Coherent Transmission Systems
Mingming Tan1, Md Asif Iqbal2, Tu T Nguyen1,3
1Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK.
Abstract:
We compared the transmission performances of 600 Gbit/s PM-64QAM WDM signals over 75.6 km of single-mode fibre (SMF) using EDFA, discrete Raman, hybrid Raman/EDFA, and first-order or second-order (dual-order) distributed Raman amplifiers. Our numerical simulations and experimental results showed that the simple first-order distributed Raman scheme with backward pumping delivered the best transmission performance among all the schemes, notably better than the expected second-order Raman scheme, which gave a flatter signal power variation along the fibre. Using the first-order backward Raman pumping scheme demonstrated a better balance between the ASE noise and fibre nonlinearity and gave an optimal transmission performance over a relatively short distance of 75 km SMF.
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