光盘多通道并行存取系统的研究  

On a Multichannel Parallel Access system for the Optical Disk

作　　者：翟金会[1] 阮玉[1] 李再光[1] 

机构地区：[1]华中理工大学光电子工程系

出　　处：《华中理工大学学报》1995年第5期60-63,共4页Journal of Huazhong University of Science and Technology

基　　金：国防科技预研基金

摘　　要：为提高光盘存储系统的数据传输速率，提出了用位相计算全息分束器实现光盘并行存取的原理．采用脉位调制技术，通过计算光栅，并由此建立了多通道读写系统．分析了并行存取系统特性及不同数据通道间的串扰影响，提出以旋转位相光栅的方法，实现并行跟踪和消除通道串扰．Anovel parallel eccess idea for an optical disk to increase the data transfer rate of an op-tical storage system using ho1ographic splitter with phase computation is proposed.Based onthe theory of holography with binary operation and using pulse position modulation by com-puter simulation,the structural parameters with accurate period of a phase grating capable ofproducing muItiple beam diffraction of equal intensity have been obtained.A phase gratingwith nine spots of uniform diffraction is developed and ,with it,a muItichannel read/writesystem with a spot array of one dimension has been worked out.The characteristics of theparallel access system and crosstalk between the adjacent data channels are analvzed.Thespot array is arranged obliquely to eliminate the crosstalk and a new splitter rotating directlyis used to achieve the parallel traeing of multi-tracks simuItaneously. It is shown that thenine-channel parallel readlwrite system can bring about a data transfer rate as high as45 MBPS.

关 键 词：光盘存储 并行存取 多通道 脉位调制 位相光栅 

分 类 号：TP333.43[自动化与计算机技术—计算机系统结构]