Crosstalks Analysis for All Optical Routers in Networks

Growing demands for bandwidth have stimulated the development of high–speed optical shared media networks. All-optical packet based networks offer the potential for high speed and flexible routing. In such systems all optical routers, which overcome the bottleneck of optoelectronic conversion, play an important role. A novel optical router, which uses a terahertz optical asymmetric demultiplexer (TOAD) as the routing element, is described in this paper. The crosstalk of all optical routers is a key issue, which determines the performance of an optical router. A mathematical model for the crosstalk is developed for a single routing element and for multistage router configurations. It is shown that crosstalk is not a limiting factor for routers with up to 6 stages.