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All-optical wavelength conversion: technologies and applications in DWDM networks

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2 Author(s)
Elmirghani, J.M.H. ; Wales Univ., Swansea, UK ; Mouftah, H.T.

Dense WDM technologies make effective use of the vast fiber bandwidth and offer an added dimension to all-optical networks. Wavelength conversion at key network nodes is emerging as a fundamental functionality that can allow transparent interoperability, contention resolution, wavelength routing, and, in general, better utilization of the network resources under dynamic traffic patterns. We offer an overview of the enabling technologies and extend the treatment to the network application of these converters. Attention is given to semiconductor optical amplifiers and their use in wavelength converters. Converters based on four-wave mixing as well as those based on nonlinear optical loop mirrors are evaluated, paying special attention to signal integrity and architectural as well as performance issues. The use of wavelength converters in wavelength routing networks is explored together with the application of these devices in contention resolution and in the routing wavelength assignment problem. Future directions are outlined at the system as well as network levels

Published in:

Communications Magazine, IEEE  (Volume:38 ,  Issue: 3 )

Date of Publication:

Mar 2000

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