Tadao Nagatsuma

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 of Excellence



Tadao Nagatsuma
Graduate School of Engineering Science, Osaka  JAPAN

Tadao Nagatsuma received B.S., M.S., and Ph.D. degrees in electronic engineering from Kyushu University, Fukuoka, Japan, in 1981, 1983, and 1986, respectively. His Ph.D. studies were on millimeter-wave and submillimeter-wave oscillators based on flux-flow phenomenon in superconducting devices. In 1986, he joined the Electrical Communications Laboratories, Nippon Telegraph and Telephone Corporation (NTT), Atsugi, Kanagawa, Japan, where he was engaged in research on the design and testing of ultrahigh-speed semiconductor electronic/photonic devices and integrated circuits. He was a Distinguished Technical Member with NTT Telecommunications Energy Laboratories (1999-2002), and a Group Leader with NTT Microsystem Integration Laboratories (2003-2007). Since 2007, he has been a Professor at the Division of Advanced Electronics and Optical Science, Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, Toyonaka, Japan. His current research interests include millimeter-wave and terahertz photonics and their applications to communications, imaging, spectroscopy and measurement.

He is a fellow of the Institute of Electronics, Information and Communication Engineers (IEICE), Japan, and members of the Technical Committee on Microwave Photonics of the IEEE Microwave Theory and Techniques Society, and the Microwave Photonics Steering Committee, and serves as an associate editor of the IEEE Photonics Technology Letters.


Project: The project to be performed within this Chair of Excellence (CoE) aims firstly at ultra-stable, widely tunable photonic sources for the generation of millimeter and terahertz (THz) waves based on the optical heterodyne technique. The research will combine a photonic integrated dual wavelength laser source, with a high speed photodiode, stabilized through optical injection from an Optical Frequency Comb (OFC). Different OFC schemes will be evaluated. The intended application scenarios are THz wireless communications as well as THz spectroscopy and imaging, together with demonstrators at Osaka University.

In addition, we will also examine photodiodes arrays, for example, from photodiodes available at UC3M from the iPHOS project. These arrays will be analyzed as a mean to increase the power of generated THz radiation through coherent combination of the electrical output from photodiodes. Control of optical phase delays will be tested as a mean to steer the THz beam.

Stay period: NOV 14 - MAR 16