Channel power control in optical amplifiers to mitigate physical impairment in optical network

The signal quality degradation, which occurs due to the aspects of fiber attenuation, splitter switch, and amplified spontaneous noise in erbium-doped fiber amplifier, may substantially erode the performance of optical communications. Among the above-mentioned factors, the physical-layer impairments may significantly weaken the signal quality at the receiver. In this paper, the impact of both the channel power adjustment and the optical signal noise rate on the optimization of optical amplifiers over the optical propagation links is studied. Our objective is to employ a proper control strategy to effectively adjust the signal power level in the chain network. A new algorithm, which takes into account the physical-layer impairments in performance optimization, facilitates an impairment aware-proportional-integral-derivative neuron controller for improving the quality of transmission. Numerical results show that the proposed controller is capable of effectively compensating for the power impairments in optical links.创新点本文针对光网络的灵活透明性导致链路物理损伤问题, 基于传输过程中的损伤感知机制, 采用PID神经元控制器对传输信号进行在线调节补偿。仿真结果表明, 该控制策略能够有效地调整光链路的信道功率, 提高光网络信噪比, 进而优化传输系统性能。