2020/06/26 by Tim Uhlemann, Sebastian Cammerer, Uhlemann, Tim +7 · 1 citation
Engineering · Physics and Astronomy · #Optical Network Technologies #Photonic and Optical Devices #Advanced Fiber Laser Technologies
paper · pdf · doi:10.48550/arxiv.2006.15027
Motivated by the recent success of end-to-end training of communications in\nthe wireless domain, we strive to adapt the end-to-end-learning idea from the\nwireless case (i.e., linear) to coherent optical fiber links (i.e., nonlinear).\nAlthough, at first glance, it sounds like a straightforward extension, it turns\nout that several pitfalls exist - in terms of theory but also in terms of\npractical implementation. This paper analyzes the potential of an autoencoder\nand limitations for the optical fiber under the influence of Kerr-nonlinearity\nand chromatic dispersion. As there is no exact capacity limit known and, hence,\nno analytical perfect system solution available, we set great value to the\ninterpretability on the learnings of the autoencoder. Therefore, we design its\narchitecture to be as close as possible to the structure of a classic\ncommunication system, knowing that this may limit its degree of freedom and,\nthus, its performance. Nevertheless, we were able to achieve an unexpected high\ngain in terms of spectral efficiency compared to a conventional reference\nsystem.\n