Tan Mingming, Iqbal Md Asif, Nguyen Tu T, Rosa Paweł, Krzczanowicz Lukasz, Phillips Ian D, Harper Paul, Forysiak Wladek
Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK.
BT Applied Research, Adastral Park, Ipswich IP5 3RE, UK.
Sensors (Basel). 2021 Sep 29;21(19):6521. doi: 10.3390/s21196521.
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.
我们使用掺铒光纤放大器（EDFA）、分立拉曼放大器、混合拉曼/EDFA以及一阶或二阶（双阶）分布式拉曼放大器，比较了600 Gbit/s偏振复用64正交幅度调制（PM-64QAM）波分复用（WDM）信号在75.6公里单模光纤（SMF）上的传输性能。我们的数值模拟和实验结果表明，采用后向泵浦的简单一阶分布式拉曼方案在所有方案中具有最佳的传输性能，明显优于预期的二阶拉曼方案，二阶拉曼方案沿光纤的信号功率变化更平缓。使用一阶后向拉曼泵浦方案在放大自发辐射（ASE）噪声和光纤非线性之间实现了更好的平衡，并在75公里单模光纤的相对短距离上给出了最优的传输性能。
