title: Frequency- and time-domain nonlinear distortion compensation in high-speed OFDM-IMDD LR-PON with high loss budget.
abstract: This study compared two nonlinear distortion compensation techniques, SSII cancellation (in the frequency domain) and Volterra filtering (in the time domain), in a >50-Gbps/λ OFDM-IMDD LR-PON. Experiment results for SNR, BER, and data rate (based on a bit-loading algorithm) revealed that the performance of frequency-domain SSII cancellation is unaffected by power fading; however, it depends heavily on the precision of the mathematical model. Conversely, although time-domain Volterra filtering is affected by the faded waveform, adaptive-weighting provides flexibility in dealing with mixed nonlinear distortion, particularly that associated with the interplay between fiber dispersion and fiber nonlinearity. 4-channel WDM-OFDM and 3rd-order Volterra filtering were used to demonstrate the feasibility of the proposed scheme in a 200-Gbps IMDD system. Based on 10-GHz EAM and PIN, we achieved 200-Gbps transmission over a distance of 60 km with a loss budget of >30 dB, while providing support for 128 ONUs at >1.6 Gbps/ONU without the need for an inline amplifier or pre-amplifier.
authors.forename: Hsing-Yu
authors.initials: HY
authors.lastname: Chen
authors.forename: Chia-Chien
authors.initials: CC
authors.lastname: Wei
authors.forename: Che-Yu
authors.initials: CY
authors.lastname: Lin
authors.forename: Li-Wei
authors.initials: LW
authors.lastname: Chen
authors.forename: I-Cheng
authors.initials: IC
authors.lastname: Lu
authors.forename: Jyehong
authors.initials: J
authors.lastname: Chen