Experiment of 2×40Gbd PAM8 MISO-FSO system reinforced by high-speed optical signal coupling and precoder-shaped multi-level polar codes: Experiment of 2×40Gbd PAM8 MISO-FSO system reinforced...: W. Yang et al. - Yang, Weiying; Liu, Xiaoyu; Xiao, Shilin; Liu, Zhiyang (Optical & Quantum Electronics, 2025)