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NTT Network Innovation Laboratories


Research and Development on Photonic Network Technology
-- Toward implementation of higher capacity, more economical networks --

This research Laboratory conducts R&D on photonic network technology such as optical linking systems, which form the infrastructure supporting NTT network services. Since the dawn of optical communications, through many innovative technologies such as optical amplifiers and wavelength-division multiplexing (WDM), link systems have advanced in capacity, distances covered and economy. Capacity has increased four orders of magnitude, and bandwidth and total distance, which are indices of transmission technology, have increased more than six orders of magnitude. Even now, we continue to support the core of NTT services with technologies such as the next-generation network (NGN).

Data traffic is expected to reach ten-times the current level in the next ten years, and 1000-times in 20 years. In order to meet this explosive increase in demand, further increases in the capacity and economy of photonic networks will be needed. The mission of this research department is to cultivate and advance photonic network technologies able to meet these difficult demands.

We are advancing R&D to establish innovative infrastructure technologies such as (1) efficient photonic networking technologies to use network resources more efficiently, (2) node technologies for optical transparent network that enable high-speed clients to transmit efficiently, (3) ultra-high-capacity digital coherent optical transmission technology, which can transmit high-speed client signals economically over long distances through use of optical properties and digital signal processing, and (4) innovative optical transport network technologies that will realize further dramatic increases in optical network function. Research results from this department are used not only in Japan, but for networks connecting countries around the world, providing data communications infrastructure that supports the daily lives of everyone.

(1)Efficient photonic networking technology

(2)Optical transparent network node technology

(3)Ultra-high-capacity digital-coherent optical transmission technology

(4)Innovative optical transport network technology

Photonic Network Technology

About Optical Amplifiers, Technology Supporting Photonic Networks

■Academic societies (Japan and overseas)

Institute of Electronics, Information and Communication Engineers (IEICE)

OFC/NFOEC (Optical Fiber Communication Conference and Exposition / National Fiber Optic Engineers Conference)

ECOC (European Conference and Exhibition on Optical Communication)

OECC (OptoElectronics and Communications Conference) ??

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