Method and apparatus for chromatic dispersion compensation

Optical communications – Multiplex – Wavelength division or frequency division

Reexamination Certificate

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C398S147000

Reexamination Certificate

active

07379670

ABSTRACT:
A method and apparatus is provided for managing chromatic dispersion in an NRZ-based WDM long-haul optical transmission system so that nonlinearities are reduced, especially those at the edge channels of the band. The method includes using between 500 ps
m and 2000 ps
m of residual dispersion and a 40%/60% pre/post DCU split ratio when the channel wavelengths are shorter than the zero dispersion wavelength. Using these dispersion compensation rules, the nonlinear propagation effects in NRZ-based WDM systems is reduced, thus allowing for higher optical power per channel and/or longer transmission distances.

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