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Abstract

Information traffic on the Internet is doubled every year. Although the present optical communication system is the key technology that supports the expanding Internet, we need higher transmission speed, larger transmission capacity, and more flexible signal processing capability in the future optical communication system. The technology innovation is now strongly expected to meet these requirements, because it becomes more and more difficult to cope with the bursting traffic simply by improving current technologies. In our laboratory, aiming at such technology innovation, we have been investigating the optical fiber network from various points of view such as physics, information theory, optical devices, measurement, and network architectures.