Performance Analyses of Dense Wavelength Division Multiplexing in Ring Metropolitan Area Networks With and Without Erbium Doped Fibre Amplifier
This Paper investigates the performance of dense wa v length division multiplexing ring networks implemnted in the metropolitan areas for the purpose of deploy ing higher bit rates. The investigations were carri ed out in the Cband operating region by deploying four channels over a single standard mode fibre with channel spacing of 100GHz at 10Gbps. Transmissions of 108km and 7km with and without Erb ium Doped Fibre Amplifier (EDFA) were achieved with a 10 fixed value of Bit Error Rate (BER). The performanc e was measured through a bit rate analyser using an eye diagram.
Dense wavelength division multiplexing
This article provides an introduction to dense wavelength division multiplexing (DWDM) technology and to DWDM communications systems. It presents a comprehensive exposure to WDM and DWDM, explains the major components in optical networks and discusses optical long-haul network functions and applications.
The Hybrid Protection Scheme in Hybrid OADM/OXC/MUX
The paper describes our recent approach towards advanced in optical survivability scheme by introducing the new wavelength reconfigurable device. It is designed by improving the drawbacks appear in the previous devices with some excellence features added. The first proposal of hybrid OADM/OXC/MUX will be named as Optical Cross Add and Drop Multiplexer (OXADM). O.X.A.D.M which has presenting the concept of filtering, add-drop function, accumulation, cross- connecting, u-turn mechanism and multiplexing in a single device architecture could also increase the vast application in optical trunk network. W ith these features, three restoration schemes have been developed to form a hybrid mechanism which is activated according to the degree and location of failures. The OXADM focuses on providing survivability through restoration against failure such as cable cut, power decreased and not functioning EDFA by means of linear protection, multiplex protection and ring protection (also be called as "u turn protection"). This paper also presents the characteristic of OXADM by using simulation, experimentally and analytically. The limitation has also been discussed as the results are compared with previous device such as OXC.