Title :
Chromatic dispersion compensation in coherent optical communications
Author :
Iwashita, Katsushi ; Takachio, Noboru
Author_Institution :
NTT Transmission Syst. Lab., Kanagawa, Japan
fDate :
3/1/1990 12:00:00 AM
Abstract :
Chromatic dispersion compensation techniques in coherent transmission systems are reviewed and discussed for potential feasibility. The key compensation device is the wideband delay equalizer. It is shown that stripline-type delay equalizers have the potential for compensating distortion up to 10 Gb/s using a conventional 1.3-μm zero-dispersion single-mode fiber at 1.5 μm. Chromatic dispersion is successfully compensated with a stripline delay for CPFSK transmission at 4 and 6 Gb/s over 200 km of 1.3-μm zero-dispersion single-mode fiber at 1.55 μm. The bandwidth requirement of the compensation techniques for heterodyne detection is more than 10 GHz. However, it is difficult to realize such broadband receivers. Therefore, phase diversity detection with dispersion compensation is a promising scheme
Keywords :
demodulation; frequency shift keying; light coherence; optical dispersion; optical links; optical modulation; 1.3 micron; 1.5 micron; 10 Gbit/s; 200 km; 4 Gbit/s; 6 Gbit/s; CPFSK transmission; broadband receivers; chromatic dispersion compensation; coherent optical communications; coherent transmission systems; heterodyne detection; key compensation device; phase diversity detection; stripline delay; stripline-type delay equalizers; wideband delay equalizer; zero-dispersion single-mode fiber; Bandwidth; Chromatic dispersion; Delay; Equalizers; Optical distortion; Optical fiber devices; Optical mixing; Optical receivers; Stripline; Wideband;
Journal_Title :
Lightwave Technology, Journal of
