NTT technical review, volume 1, No. 7

NTT Science and Core Technology Laboratory Group is undertaking the cutting-edge R&D needed to support future ubiquitous and broadband services. R&D activities are being conducted at Atsugi, Musashino, Yokosuka, and Keihanna. While the other two laboratory groups (NTT Cyber Communications Laboratory Group and NTT Information Sharing Laboratory Group) aim to boost NTT busi- ness in the near future, we are targeting the more distant future.Papers included in this review:Research on Large-capacity Photonic Routers toward Optical Packet-switched Networks; Recent Progress in Optical Switching Device Technologies in NTT; Recent Advances in Optical Switches Using Silica-based PLC Technology; High-speed Switching Operation in a Thermocapillarity Optical Switch for Application to Photonic Networks; Development of a Large-scale 3D MEMS Optical Switch Module; Monolithically Integrated 64-channel WDM Channel Selector; A High-speed Tunable Optical Filter Using a Semiconductor Ring Resonator; Live Streaming Switch System for Wide-area, Low-cost, and High-quality Internet Broadcasting; Peer-to-peer-based, High-quality Live Video Delivery System for Business-to-business Applications; Scalable Content Delivery Technology; Highly Accurate Similar Case Retrieval System for Call Centers Using Two-word Linked Expressions; Image Systems Using RFID Tag Positioning Information; Spot Information Navigator; Standardization of G-PON (Gigabit Passive Optical Network) in ITU-T; Three Leading Japanese Firms Jointly Develop a New Encryption Technology Elliptic Curve Cryptosystem (ECDSA Signature); Most Advanced Wireless Technology in Scotland Launched at EICC; and A Step Closer to Diamond Devices for Communication Satellites, Broadcasting Stations, and Radars.