Like the air that we always breathe but are unaware of its existence, optical communication makes the network breath in every second.
Since the 45Mb/s optical transmission system was first deployed in early 1980s, the optical communication has made a rapid progress so that 1Tb/s currently becomes an available technology and 10Tb/s is expected to be deployed in 5 or 6 years.
This progress was made possible through incessant inventions including single-mode optical fibers, high-speed optical transmission technologies and related devices, WDM, optical amplifiers, and wavelength selective switches.
An increase of telecommunication traffic having been triggered by Internet is 40% per year and is expected to continue afterwards resulting in 10-folds traffics in every 6~7 years. The network traffic will be 10Tb/s in year 2015 and 100Tb/s around year 2020.
Considering ICT a means to solve the imminent global problems of energy and environment, the drastic traffic increase should be taken as a natural.
The Optical Internet Department conducts the research on technologies that enable the network of 10Tb/s, 100Tb/s and 1Pb/s step by step. Those networks can be realized only through innovations that we never have experienced. We focus our effort to achieve technical breakthroughs on the issues below.
It is not possible to realize the 10Tb/s or higher transport network with current network architecture that is multi-layered with IP, Ethernet, TDM, optic transport network.
It becomes possible to provide 10Tb/s or higher service with required performance only through the best combination of the transport network layers and the new way of operation of them. Accordingly, we conduct R&D projects to integrate the multi-layered transport network over the concrete foundation of optical transport technologies to meet the near-term goal.
We also pursue the optical switches and protocols to realize the network of 10Tb/s or more to meet the mid- and long-term goal.
The increase of network traffic will be stopped not by the service demand, but by the network transport capability if there is no network innovation any more. There should be a good opportunity for the innovative group to lead the evolution of network.
The Optical Internet Department do their best to solve the present problems of the network and lead the evolution of the future network.