Background
Katsunari Okamoto was born on October 19, 1949, in Hiroshima, Japan. He is a son of Toshio and Chisao Okamoto.
University of Tokyo, Bunkyō, Tokyo, Japan
Katsunari Okamoto received the Bachelor of Science, Master of Science, and Doctor of Philosophy degrees in electronics engineering from the University of Tokyo, in 1972, 1974, and 1977, respectively.
(Fundamentals of Optical Waveguides is an essential resour...)
Fundamentals of Optical Waveguides is an essential resource for any researcher, professional or student involved in optics and communications engineering. Any reader interested in designing or actively working with optical devices must have a firm grasp of the principles of lightwave propagation. Katsunari Okamoto has presented this difficult technology clearly and concisely with several illustrations and equations. Optical theory encompassed in this reference includes coupled-mode theory, nonlinear optical effects, finite element method, beam propagation method, staircase concatenation method, along with several central theorems and formulas. Since the publication of the well-received first edition of this book, planar lightwave circuits, and photonic crystal fibers have fully matured. With this second edition, the advances of these fibers along with other improvements on existing optical technologies are completely detailed. This comprehensive volume enables readers to fully analyze, design and simulate optical atmospheres.
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2000
(Ubiquitous IT services are just beginning to emerge, yet ...)
Ubiquitous IT services are just beginning to emerge, yet the time is coming when they will truly revolutionize information technology. Based on groundbreaking papers presented at the International Symposium on New Frontiers for Ubiquitous IT Services, this far-reaching resource provides engineers with a detailed look at the technological developments that are blazing the way to a new information age. It describes a wide range of state-of-the-art engineering advances in photonics, sensing, electronics, micro-mechatronics, networks, and communication schemes along with promising applications that run the gamut from biomedical sensors and intra-body networks to smart buildings and long haul communications. For all professionals committed to realizing ubiquitous IT services, this book will prove to be indispensable for confronting the challenges yet to be tackled.
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2004
Katsunari Okamoto was born on October 19, 1949, in Hiroshima, Japan. He is a son of Toshio and Chisao Okamoto.
Katsunari Okamoto received the Bachelor of Science, Master of Science, and Doctor of Philosophy degrees in electronics engineering from the University of Tokyo, in 1972, 1974, and 1977, respectively.
Katsunari Okamato joined the Ibaraki Electrical Communication Laboratories of Nippon Telegraph and Telephone Public Corporation (now NTT) in 1977 and engaged in research on the transmission characteristics of multimode, dispersion-flattened single-mode, single-polarization (PANDA) fibers, and fiber optic components. He proposed dispersion-flattened fiber (DFF) and succeeded in fabricating DFF with chromat-ic dispersion of less than +1 ps/km/nm over a wide spectral range.
From September 1982 to September 1983, he was an invited guest researcher at the Optical Fiber Group, Southampton University, Southampton, United Kingdom, where he was engaged in research on birefringent optical fibers. From October 1987 to October 1988, he was at RCAST (Research Center for Advanced Science and Technology) of the University of Tokyo as an associate professor with Dr. E. A. J. Marcatili from AT&T Bell Laboratories, who was an invited guest professor of the endowed chair at RCAST. Together, they studied the influence of nonlinear optical effects on the propagation characteristics of optical fibers. Along with research activities, they taught electromagnetic theory, optoelectronics, and fiber optics in the Electronics and Applied Physics Department.
Since 1990, he has been working on the analysis and synthesis of guided-wave devices, computer-aided-design (CAD), and fabrication of silica-based planar lightwave circuits (PLCs) at NTT Photonics Laboratories, Ibaraki. He developed a CAD tool based on the beam propagation method and FEM waveguide and stress analysis methods. The design tool for AWG filters is widely utilized in NTT Photonics Laboratory and in one of its subsidiaries, NEL. He has developed a 256 x 256 star coupler, various kinds of AWGs ranging from 8-ch, 300-nm-spacing AWGs to 128-ch 25-GHz AWGs, flat-spectral-response AWGs, and integrated-optic reconfigurable add/drop multiplexers. AWGs with spacings of 200 to 50 GHz are now widely used in commercial WDM systems.
In 2003, he started Okamoto Laboratory Ltd., which is an R&D consulting company that deals with the custom design of optical fibers and functional PLCs. He has published more than 220 papers in technical journals and international conferences, including several books such as Optical Fiber (in Japanese, 1983), Optical Fiber Sensor (in Japanese, 1983), and others.
(Fundamentals of Optical Waveguides is an essential resour...)
2000(Ubiquitous IT services are just beginning to emerge, yet ...)
2004Katsunari Okamoto is a member of the Institute of Electrical and Electronics Engineers (Fellow), the Optical Society of America, and the Institute of Electronics, Information and Communication Engineers.
On May 18, 1980, Katsunari Okamoto married Kuniko Okamoto. They have two children: Hiroaki, Masaaki.