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All-optical networks are able to transport data from source to destination entirely in the optical domain. This is a departure from current optical networks that rely on Optical-Electrical-Optical (OEO) conversion at each intermediate connection node to route data properly. The opacity inherent in traditional networks is costly in terms of the limiting bandwidth and increasing switching complexity. MPLS, OBS and OPS have been proposed as solutions to realizing an all-optical network. MPLS and OBS have the advantages of creating all-optical connections between nodes, but don't allow intermediate nodes to also use the wavelength. Additionally, optical switches are constantly being reconfigured to accommodate new connections. OPS can make switching decisions in the optical domain, but the technology is immature.

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Format:PDFSize:161 KB
Date:Jan 2008
Pages:5

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