Spatial multiplexing and optical PAM4 quadruple the date rate in optical fiber systems

C Su, B Chowdhury, S Harish, M Tu, S Murshid - Applied Optics, 2022 - opg.optica.org
This endeavor demonstrates a two-channel spatial division multiplexed (SDM) system and
combines it with an all-optical four-level pulse amplitude modulation (PAM4) scheme to …