变密度均光波导多层存储器原理和实验  

Principles and Experiments of the Distributed Uniform Scattering Waveguide Multilayer Memory

作　　者：杨涛[1] 梁忠诚[1] 

机构地区：[1]南京邮电大学数理学院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2007年第5期73-77,共5页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(60377006)资助项目

摘　　要：介绍了变密度均光波导多层存储器的基本结构和原理。波导多层存储器是通过收集波导侧面信息符发出的散射光来读取数据的,而变密度均光波导多层存储器的设计主要是为了解决波导多层存储器侧面散射光强不均匀的问题。理论推导表明当波导衰减系数沿着寻址光传播方向逐渐增加时可以实现波导侧面散射光强均匀分布。而波导衰减系数的其中一个参量就是信息符的分布密度,因此我们通过改变不同位置处信息符的分布密度就可以实现均光。为了证明理论的正确性,设计了原理性实验,完成了原理性实验器件的研制。原理性实验对变密度均光波导多层存储器的结构、原理以及实现均光的可行性进行了验证。实验还将变密度均光波导多层存储器的性能与一般的波导多层存储器作了对比,实验效果良好。　The structure and principles of the distributed uniform scattering waveguide multilayer memory is introduced.To read the information in the waveguide multilayer memory,an optoelectronic detector is used to detect the scattering beams emitted from the information dots on the waveguide surface.But the scattering light intensity distribution on the waveguide multilayer memory surface is not uniform which leads to low SNR.Distributed uniform scattering waveguide multilayer memory can cover this defect by changing the density of information dots in each position.It has been proved that one of the methods to realize the uniform scattering is to increase the attenuation coefficient along the propagation light.Because the density of information dots is a parameter of the attenuation coefficient,changing density is a realizable method.Finally experiment set-ups are designed to prove the feasibility of the theories above.An experimental storage device is fabricated and some good experimental results are demonstrated,including two photos contrasting the performance of the distributed uniform scattering waveguide multilayer memory with that of the ordinary waveguide multilayer memory.

关 键 词：光存储 波导多层 光散射 波导存储器 

分 类 号：TN252[电子电信—物理电子学] TP333.4[自动化与计算机技术—计算机系统结构]