100 Gbps High-Speed Broadband Networks

Abstract

Information and communication technology (ICT) is growing rapidly due to large demand of voice, data, Internet, and intranet. Internet is growing at a rate of 150% per annum, whereas voice/data communication is growing at a rate of 50% per annum. Hence, large bandwidths and high-speed transmission are required to match above growth. High-end technology based on optical fiber communication is now extensively used for communication using optical coherent transmission at 40, 100 Gbps in Japan, Singapore, Hong Kong, USA, and Europe. The trend is to deploy 400 Gbps optical fiber networks during 2015–16. The optical coherent transmission with low form factor, low power consumption, and high reliability is used in high-speed network due to development of low power DSP, pluggable optical modules on single package. Hence, miniaturization of optical devices is required. 25 Gbps Ethernet (25 GbE) and 50 Gbps Ethernet (50 GbE) are used in data center network equipment for connectivity of systems at data rate as high as 100 Gbps. This paper deals with optical coherent transmission technology with coherent detection used in 40 and 100 Gbps networks. The 100 Gbps data centers are now extensively used in metro-access networks, core network, whereas higher data rates based on 400 Gbps systems are going to be used in near future. These are deployed in high-speed broadband networks to achieve maximum transmission at 4 Tera bits per second using DWDM.