Abstract
(Invited) Earlier ideas for the deployment of fiber for local loop applications depended on immediate broadband multi-service provision to provide economic justification. More recently it has become widely accepted that optical technology must initially be deployed in the local loop for existing telephony (and other) services with networks being subsequently uprated to carry new broadband services as and when the market and regulatory situations permit. This change in strategy has led to new ideas on network architectures and in particular to the emergence of Passive Optical Networks (PON's). The latter rely on the use of passive optical splitters to efficiently share network costs over many customers while at the same time maintaining the potential for evolution for future broadband services (Fig. 1).1-3
© 1991 Optical Society of America
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