Placement of semiconductor optical amplifiers in WDM ring topology networks

摘要

In this paper, an analytical approach to evaluate the number of users supported by a typical WDM ring topology network has been given. To increase the number of supportable users, usage of semiconductor optical amplifiers (SOAs) have been explored. The network analysis is performed for three cases viz., without SOAs, with ideal SOAs and with gain saturated SOAs. In all the cases, the effect of extinction ratio is also considered. It has been observed that for zero extinction ratio, the network without SOAs supports 96 users. With ideal SOAs in the network, the number of users will increase to 608. When saturation effect in amplifier gain is considered, the number of supportable users will decrease to 320 only.