High Bandwidth Electro-optic Scanner for Optical Data Storage

概要

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Beam deflectors can be used as fine tracking actuators to improve track access time and data rate in future high performance optical disk drives. In this paper we report on the use of an electro-optic(EO) scanner for optical data storage. Track following has been accomplished using this EO actuator with a servo bandwidth of 200kHz, and single-stage high-speed track switching/following has been demonstrated in a new optical head tracking system with reduced offset. A fine tracking experiment has also been demonstrated using an EO actuator with a voice coil motor(VCM) actuator to extend the fine tracking range. A new compensator design method, the PQ method, has been used for this scanner/VCM compound actuator system. Significant improvements in track switching/following speed are demonstrated with the scanner/VCM compound actuator as compared to tracking with VCM actuator alone.
社団法人応用物理学会の論文
2000-02-28