Sunao Kakizaki

Optical cross-connect systems for restoration of backbone fiber networks

Summary form only given. As the capacity of backbone networks is becoming larger, restoration against fiber/cable failures must become faster, because large amounts of data would be lost during the failure. The optical cross-connect (OXC) technology is an attractive alternative for fast restoration, and has the potential to provide bandwidth-management capability in future wavelength-division multiplexing (WDM) networks. This paper describes newly developed OXC systems with a low insertion loss of 1.16 dB and a high-speed restoration of <150 ms.

Variable spot-size waveguide for laser printing

A variable-spot-size Ti-LiNbO(3) waveguide that permits electro-optical longitudinal shifting of the focal point is described. A 70% spot-size increase is observed for the ±60-V power supply. This spot-size variation technique is used in a basic experiment on halftone laser printing.

High-speed optical protection system using MEMS optical switch triggered by SONET performance monitor

High-speed and low cost optical 1+1 protection system using a MEMS optical switch triggered by SONET performance monitor (SD/SF) for high accuracy protection was developed. 980 /spl mu/s switching time of optical power recovery was demonstrated.