Chen T, Deng L, Wang Q, et al. Modeling of Optical Fiber Transmission System with Third Order Raman Amplifier based on Neural Network[J]. Study on Optical Communications, 2025(5): 240111.
Chen T, Deng L, Wang Q, et al. Modeling of Optical Fiber Transmission System with Third Order Raman Amplifier based on Neural Network[J]. Study on Optical Communications, 2025(5): 240111. DOI: 10.13756/j.gtxyj.2025.240111.
Modeling of Optical Fiber Transmission System with Third Order Raman Amplifier based on Neural Network
Third order Distributed Raman Amplifier (DRA) is a novel technology in unrepeatered transmission. Compared with first- and second-order DRA
they offer superior gain and noise performance
yet their propagation dynamics are markedly more intricate. However
the current modeling of third order DRA is mostly based on the Raman power coupling equations
which demand numerical solvers and entail heavy computational loads. Conversely
lightweight data-driven machine-learning models require vast datasets and suffer from limited generalization. New modeling methods are therefore needed to improve computational speed while ensuring the accuracy.
【Methods】
2
Physic Informed Neural Network (PINN) isproposed to model third order Raman amplified optical transmission systems. This method combines the advantages of numerical methods and data-driven machine learning to transform the solution of differential equations into optimization problems. By using constraints such as differential equations and boundary conditions as loss functions
neural network training is achieved
allowing the model to balance the computational accuracy and complexity.
【Results】
2
An 120 km fiber optics transmission system with 47 channels in C-band and amplified by a third order Raman amplifier is built in the paper. Compared with the numerical method
the error of PINN is less than 0.19 dB for the signals
and the results for the pumps are almost the same. Simultaneously
PINN reduced the number of computational operations by one order of magnitude.
【Conclusion】
2
PINN can accurately predict the power evolution of pumps and signals in third order Raman amplified optical transmission systems
and significantly reduce the complexity compared to traditional numerical methods.
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