Abstract

The advantages of employing passive optical architectures in the access network have been largely recognized. Particularly, recent developments in optical technologies have made the realization of wavelength division multiplexing passive optical networks (WDM PON's) feasible and cost-effective. These networks are more future-proof than conventional PON's, thanks to their intrinsic optical transparency and their extremely high transmission capacity. A very useful optical routing device, called Waveguide Grating Router, is the basic building-block of new PON architectures capable of connecting a large number of users or to improve the use of the optical bandwidth. In this paper, we analyze the connectivity of WDM PON's composed of multiple stages of WGR devices. A design tool is also presented which is able to easily evaluate the connectivity functions of complex WDM PON's. The feasibility of these architectures is discussed by considering the costs and the technological limitations on the optical components.

[IEEE ]

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