光路几何配置对体全息存储角度复用度的影响_王小怀.pdfVIP

29 3 V ol . 29 N o. 3 2008 5 J o ur nal o f A pplied O p ics M ay 2008 : 1002-20 82( 200 8) 03-04 69-04 王小怀 ( , 52 1041) 摘　要: 　利用耦合波理论对体全息存储角度复用方式的基本原理进行了 论, 分析了对称写入、 非对称写入及邻面写入等不同光路几何配置对角度复用度的影响。考虑存储介质临界角的限制, 推导出最大角度复用度的计算公式。理论分析及数值模拟表明: 非对称入射光路比对称入射光路 更有利于提高系统的角度复用度; 邻面入射光路的角度复用度最高且与参考光入射角改变量成正 比, 邻面入射光路是最佳的角度复用存储光路。 关键词: 　体全息存储; 角度复用; 光路几何配置; 衍射效率 : O 438. 1: A Influence of beam path geometrical arrangement on angular multiplex density in volume holographic storage - WA N G Xiao huai ( Depar men of Phy sics a nd Elec r onic Eng ineering , Hanshan N o rmal U niv ersi y, Chao zho u 52 1041, China) Abstract: Based o n coupled-w ave heo ry, he fundamen al principle o f angular m ul iplex in vol um e holog raphic s or ag e is discussed. T he inf luence of he diff eren beam pa h geom e ric , , - , arrangemen s such as symm e rical w ri e unsym me r ical w ri e and near plane w ri e o n he ang ul ar mul iplex densi y w as analy zed. Co nsidering he limi a ion o f o al reflec ion abou s or ag e m a erial, he equa ion of m ax imum ang ul ar m ul iplex densi y w as derived . T he heor e ical anal ysis and digi al simula ion resul s indica e ha he unsymm e rical inciden ligh pa h has a hig her angular mul iplex densi y han he sy mme rical o ne, and he angular mul iplex densi y o f he near-plane inciden beam pa h is he bes and is dir ec l y propor ional o he reference beam . Key words: vol ume ho logr aphic s orage; ang ular mul iplex ; beam pa h geom