title: EAM-based high-speed 100-km OFDM transmission featuring tolerant modulator operation enabled using SSII cancellation.
abstract: In this study, a technique was developed to compensate for nonlinear distortion through cancelling subcarrier-to-subcarrier intermixing interference (SSII) in an electroabsorption modulator (EAM)-based orthogonal frequency-division multiplexing (OFDM) transmission system. The nonlinear distortion to be compensated for is induced by both EAM nonlinearity and fiber dispersion. Because an OFDM signal features an inherently high peak-to-average power ratio, a trade-off exists between the optical modulation index (OMI) and modulator nonlinearity. Therefore, the nonlinear distortion limits the operational tolerance of the bias voltage and the driving power to a small region. After applying the proposed SSII cancellation, the OMI of an OFDM signal was increased yielding only a small increment of nonlinear distortion, and the tolerance region of the operational conditions was also increased. By employing the proposed scheme, this study successfully demonstrates 50-Gbps OFDM transmission over 100-km dispersion-uncompensated single-mode fiber based on a single 10-GHz EAM.
authors: Hsing-Yu
authors: HY
authors: Chen
authors: Chia-Chien
authors: CC
authors: Wei
authors: I-Cheng
authors: IC
authors: Lu
authors: Yu-Chao
authors: YC
authors: Chen
authors: Hsuan-Hao
authors: HH
authors: Chu
authors: Jyehong
authors: J
authors: Chen