Chromatic dispersion compensation in coherent optical communications

• Published in: Journal of lightwave technology Vol. 8; no. 3; pp. 367 - 375
• Main Authors: Iwashita, K., Takachio, N.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.03.1990; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Bandwidth; Chromatic dispersion; Delay; Equalizers; Exact sciences and technology; Optical distortion; Optical fiber devices; Optical mixing; Optical receivers; Stripline; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Wideband; Optical transmission; Compensation; Equalizer; Equalization; Compensating network; Coherent detection; Light dispersion; Optical fiber
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/50.50733

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- mu m zero-dispersion single-mode fiber at 1.5 mu m. Chromatic dispersion is successfully compensated with a stripline delay for CPFSK transmission at 4 and 6 Gb/s over 200 km of 1.3- mu m zero-dispersion single-mode fiber at 1.55 mu m. 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.< >