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6 October 1986 Bandwidth Enhancement By Correcting Chromatic Dispersion Of 1.55µm Single-Mode Fibre Links
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Proceedings Volume 0630, Fibre Optics '86; (1986)
Event: Sira/Fibre Optics '86, 1986, London, United Kingdom
For many years research has been engaged to fight 1.55 μm chromatic dispersion of long-haul single-mode fibre links. Some solutions have usually been proposed, like low dynamic spectral width sources, as distributed-feedback lasers, or optical fibres with particular structure, as quadruple-clad or triangular index profile fibres. These solutions present some problems of reliability, reproducibility and performance improvement, which still remain to be solved. A new device is proposed to fight chromatic dispersion and then to improve span x bit-rate product of a given classical step-index fibre link. It consists in a wavelength demultiplexing done by a diffraction grating, in order to spatially separate each longitudinal mode of the laser. Each of them is then coupled to a short multimode fibre whose length is adjusted to compensate exactly for the corresponding delay time induced in the link by its total chromatic dispersion. The ends of these fibres finally converge on a fast photodetector which provides a signal showing no distorsion and being insensitive to the laser mode-partition noise. A bandwidth enhancement of almost one order of magnitude has been demonstrated.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. J. Bernard and J. Guillon "Bandwidth Enhancement By Correcting Chromatic Dispersion Of 1.55µm Single-Mode Fibre Links", Proc. SPIE 0630, Fibre Optics '86, (6 October 1986);

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