イトウ　マサユキ   ITOH MASAYUKI   伊東 雅之    所属   医療保健学部 臨床工学科    職種   教授
言語種別	英語
発行・発表の年月	2024/03
形態種別	国際会議論文
査読	査読あり
招待論文	招待あり
標題	Fabrication of waveguides with high optical confinement and application to future high-capacity networks (Keynote Speech)
執筆形態	単著
掲載誌名	OPTICS- LASER 2024 Abstract Book
掲載区分	国外
出版社・発行元	Scholars Conferences
担当区分	筆頭著者
著者・共著者	Masayuki Itoh
概要	The fabrication process of waveguides with high optical confinement for high-speed, large-capacity transmission, the current status of optical networks applying these waveguides, handling and transmission methods of healthcare data (physical and mental) in the future high-speed data society, and the measurement and evaluation of these data will be reviewed. In realizing high-speed and high-capacity transmission, silica-based planar lightwave circuits (PLCs) are key devices for optical communication networks based on optical transmission systems, such as metropolitan networks and access networks, as well as for backbone applications. PLC devices, especially silica-based arrayed waveguide gratings (AWGs) for wavelength division and wavelength division, power splitters for splitting optical signals, and optical switches for switching circuits, play an important role in practical transmission systems. In these systems, PLC devices are expected to be single-chip, compact, and highly integrated to reduce manufacturing costs and increase the number of channels. To realize these goals, it is very important to miniaturize devices such as AWGs. For example, even if the refractive index difference Δ of a waveguide is 2.5 %, a bent waveguide with a curvature radius as large as 1 mm occupies a large area in the package. Therefore, it is not possible to increase the mounting density of the device. One way to overcome this problem is to use extremely high-Δ (>2.5%) waveguides that can be bent compactly. The presentation will focus on the fabrication process of these extremely high-Δ waveguides, followed by a discussion of the current state of optical networks and the transmission and evaluation methods for physical and mental health care data, especially biological information data, in the future high-speed, large-capacity data society.