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Toshimasa Umezawa

Fiber Wireless and Optical Wireless Communications Using High Speed Photonic Devices

Toshimasa Umezawa, Tien Dat Pham, Atsushi Kanno, Naokatsu Yamamoto

National Institute of Information and Communications Technology (NICT), Japan


In the next generation of communication technology, high data rate, low latency communication will be indispensable. In order to achieve those targets, wireless communication technology combined with photonics will have a big potential. In this talk, we will present fiber wireless and optical wireless communications and its key device as the advanced wireless communication technologies. A new device integrated with a 100 GHz uni-travelling carrier photodetector and a 100 GHz pHEMT amplifier will be introduced for high data rate fiber wireless communication application beyond 10 Gbps. For optical wireless communication applications, a new two-dimensional photodetector array device will be introduced and the link performances will be discussed.

Toshimasa Umezawa received B.E. and M.E. degrees in electronics from Nagaoka University, Niigata, Japan, in 1984 and 1986, respectively. From 1987 to 2011, he worked for the Yokogawa Electric Corporation; he was with the Central Research Laboratory and with the Photonics Business Department. In 1992, he was a visiting scholar in the Department of Applied Physics, Stanford University, and he received a Ph.D. degree in electronics from Tokyo University, Tokyo, Japan, in 1995, where he was engaged in research on superconductor devices, photonics devices, and their applications. In 2011, he joined the National Institute of Information and Communications Technology (NICT), Tokyo, Japan. His current research interests are E/O devices and photonic integrated circuits and millimeter-wave photonics.