Method and apparatus for chromatic dispersion compensation
US7379670B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Mar 21, 2002 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Dec 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2543
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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/nm and 2000 ps/nm 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.