Panorama atual das redes WDM: estado da arte

Abstract

This paper presents some aspects of optical networks, with special focus on the current situation of WDM networks, technology to optimize the use of optical networks by reducing the use of fiberglass as many optical signals can be transmitted simultaneously by a single medium. In addition to it is large transmission capacity, WDM networks can also carry various types of digital hierarchies with high availability and security. It is thanks to this new technology that has become common to use voice and video applications on demand and in real time from many clients at the same time, transmission of digital TV broadcast and multicast among many other applications. Additionally highlights the four main types of WDM: CWDM (Coarse Wave Division Multiplex), DWDM (Dense Wave Division Multiplex), WWDM (Wide Wavelength Division Multiplexing) and UDWDM (Ultra Dense Wave Division Multiplex). Is it possible to know the main equipment used for these technologies, as well as future prospects and challenges for the full operation of an entirely optical network.