Compensation of 202 km single-mode fibre chromatic dispersion in 4 Gbit/s optical CPFSK transmission experiment

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Abstract
Compensation for fibre chromatic dispersion in a coherent transmission system is demonstrated. A 4 Gbit/s optical CPFSK signal at 1.55 µm is transmitted through a 202 km conventional single-mode fibre. There is 1.8dB degradation in transmission caused by fibre chromatic dispersion. This degradation has been completely compensated for using a delay equaliser with optical heterodyne detection.