[31] K. Zou, K. Pang, H. Song, J. Fan, Z. Zhao, H. Song, R. Zhang, H. Zhou, A. Minoofar, C. Liu, X. Su, N. Hu, A. McClung, M. Torfeh, A. Arbabi, M. Tur, A. E. Willner. High-capacity free-space optical communications using wavelength-and mode-division-multiplexing in the mid-infrared region. Nat. Commun., 13, 7662(2022).
[44] J. G. Proakis, M. Salehi. Digital Communications(2008).
[45] See https://www.nextnano.de/ for obtaining the nextnano executables and related publications.
[46] S. Haykin. Digital Communications(1988).