Analytic Models for the Capacity Distribution in MDG-impaired Optical SDM Transmission
<|reference_start|>Analytic Models for the Capacity Distribution in MDG-impaired Optical SDM Transmission: In coupled space-division multiplexing (SDM) transmission systems, imperfections in optical amplifiers and passive devices introduce mode-dependent loss (MDL) and gain (MDG). These effects render the channel capacity stochastic and result in a decrease in average capacity. Several previous studies employ multi-section simulations to model the capacity of these systems. Additionally, relevant works derive analytically the capacity distribution for a single-mode system with polarization-dependent gain and loss (mode count D = 2). However, to the best of our knowledge, analytic expressions of the capacity distribution for systems with D > 2 have not been presented. In this paper, we provide analytic expressions for the capacity of optical systems with arbitrary mode counts. The expressions rely on Gaussian approximations for the per-mode capacity distributions and for the overall capacity distribution, as well as on fitting parameters for the capacity cross-correlation among different modes. Compared to simulations, the derived analytical expressions exhibit a suitable level of accuracy across a wide range of practical scenarios.<|reference_end|>
@article{zischler2024analytic,
    title={Analytic Models for the Capacity Distribution in MDG-impaired Optical
  SDM Transmission},
    author={Lucas Zischler and Darli A. A. Mello},
    journal={arXiv preprint arXiv:2406.12487},
    year={2024},
    archivePrefix={arXiv},
    eprint={2406.12487},
    primaryClass={eess.SP cs.IT math.IT}
}