期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2013
卷号：1
期号：4
出版社：S&S Publications
摘要：In today’s world, demand for bandwidth is driven largely by new data applications, Internet usage, andgrowth in wireless communications. In response to this explosive growth in bandwidth demand, along with theemergence of IP as the common foundation for all services, long-haul service providers are moving away from TDMbased systems, which were optimized for voice but now prove to be costly and inefficient. This paper discuss thefundamentals of wavelength division multiplexing in fiber optic telecommunications, which is a technology whichmultiplexes multiple optical carrier signals on a single optical fiber by using different wavelengths of laser light tocarry different signals. This allows for a multiplication in capacity, in addition to making it possible to performbidirectional communications over one strand of fiber. This paper discuss about the increased need of carrierbandwidth, some possibilities to increase it and comparisons of TDM and WDM. It also discusses dense wavelengthdivision multiplexing (DWDM) as an important innovation in optical networks and the benefits it can provide in opticalcommunication.
