Abstract
The adaptive control of operating point (ACOP) of optical amplifiers is a significant challenge in the dynamic optical networks. The ACOP approaches aim to autonomously define the gain of the amplifier after the occurrence of changes in the input power of these devices. These changes are frequent and unpredictable in dynamic optical networks, and they can drive the amplifier to operate adding more noise and increasing the signal distortion. Many approaches have been recently proposed, but they have been assessed in simplified scenarios, e.g., disregarding non-linearities. In this letter, we present a more accurate evaluation of the ACOP approaches by using a Gaussian-noise model for the non-linear interference (NLI). Moreover, we propose modifications in some ACOP approaches to consider NLI in the adaptation process. The results show that approaches which can achieve good results in a more straightforward amplifier noise-based model are very impacted concerning performance issues.
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