EAM-based high-speed 100-km OFDM transmission featuring tolerant modulator operation enabled using SSII cancellation

Hsing Yu Chen, Chia Chien Wei, I. Cheng Lu, Yu Chao Chen, Hsuan Hao Chu, Jyehong Chen

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

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.

Original languageEnglish
Pages (from-to)14637-14645
Number of pages9
JournalOptics Express
Volume22
Issue number12
DOIs
StatePublished - 16 Jun 2014

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