title: Digital subcarrier multiplexing for fiber nonlinearity mitigation in coherent optical communication systems.
abstract: In this work we experimentally investigate the improved intra-channel fiber nonlinearity tolerance of digital subcarrier multiplexed (SCM) signals in a single-channel coherent optical transmission system. The digital signal processing (DSP) for the generation and reception of the SCM signals is described. We show experimentally that the SCM signal with a nearly-optimum number of subcarriers can extend the maximum reach by 23% in a 24 GBaud DP-QPSK transmission with a BER threshold of 3.8 × 10(-3) and by 8% in a 24 GBaud DP-16-QAM transmission with a BER threshold of 2 × 10(-2). Moreover, we show by simulations that the improved performance of SCM signals is observed over a wide range of baud rates, further indicating the merits of SCM signals in baud-rate flexible agile transmissions and future high-speed optical transport systems.
authors.forename: Meng
authors.initials: M
authors.lastname: Qiu
authors.forename: Qunbi
authors.initials: Q
authors.lastname: Zhuge
authors.forename: Mathieu
authors.initials: M
authors.lastname: Chagnon
authors.forename: Yuliang
authors.initials: Y
authors.lastname: Gao
authors.forename: Xian
authors.initials: X
authors.lastname: Xu
authors.forename: Mohamed
authors.initials: M
authors.lastname: Morsy-Osman
authors.forename: David V
authors.initials: DV
authors.lastname: Plant