Effects of chromatic dispersion on optical coherent-detection systems

Chromatic dispersion induces to a phase-modulated optical signal a constant phase rotation that was never included in most previous studies. When the constant phase shift is removed by a phase-locked loop, the dispersion tolerance of a coherent-detection system is increased. The dispersion tolerance...

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Veröffentlicht in:	IEEE transactions on communications 2008-09, Vol.56 (9), p.1422-1424, Article 1422
Hauptverfasser:	HO, Keang-Po, WANG, Hsi-Cheng
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Chromatic dispersion Coherence Computer simulation Detection, estimation, filtering, equalization, prediction Differential quadrature phase shift keying Dispersions Exact sciences and technology Information, signal and communications theory Keying Mathematical models Modulation, demodulation Optical communication Optical distortion optical fiber communication systems Optical fiber communications Optical fiber dispersion Optical filters Optical receivers Optical signal processing Optical telecommunications Phase locked loops Phase measurement Phase shift Phase shift keying Signal and communications theory Signal, noise Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory time-resolved optical filtering Tolerances Transmission and modulation (techniques and equipments)
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Beschreibung
Zusammenfassung:	Chromatic dispersion induces to a phase-modulated optical signal a constant phase rotation that was never included in most previous studies. When the constant phase shift is removed by a phase-locked loop, the dispersion tolerance of a coherent-detection system is increased. The dispersion tolerance of phase-shift keying (PSK) signal is compared with differential PSK (DPSK) signals by numerical simulation and experimental measurement. Contrary to conventional belief, PSK signal has larger dispersion tolerance than DPSK signal.
ISSN:	0090-6778 1558-0857
DOI:	10.1109/TCOMM.2008.060432