Frequency-Domain Equalization for Coherent Optical Single-Carrier Transmission Systems

Koichi ISHIHARA; Takayuki KOBAYASHI; Riichi KUDO; Yasushi TAKATORI; Akihide SANO; Yutaka MIYAMOTO

doi:10.1587/transcom.E92.B.3736

Regular Section

Frequency-Domain Equalization for Coherent Optical Single-Carrier Transmission Systems

Koichi ISHIHARA, Takayuki KOBAYASHI, Riichi KUDO, Yasushi TAKATORI, Akihide SANO, Yutaka MIYAMOTO

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Keywords: frequency-domain equalization (FDE), coherent optical transmission, chromatic dispersion (CD), polarization mode dispersion (PMD), digital signal processing (DSP)

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2009 Volume E92.B Issue 12 Pages 3736-3743

DOI https://doi.org/10.1587/transcom.E92.B.3736

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Abstract

In this paper, we use frequency-domain equalization (FDE) to create coherent optical single-carrier (CO-SC) transmission systems that are very tolerant of chromatic dispersion (CD) and polarization mode dispersion (PMD). The efficient transmission of a 25-Gb/s NRZ-QPSK signal by using the proposed FDE is demonstrated under severe CD and PMD conditions. We also discuss the principle of FDE and some techniques suitable for implementing CO-SC-FDE. The results show that a CO-SC-FDE system is very tolerant of CD and PMD and can achieve high transmission rates over single mode fiber without optical dispersion compensation.

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