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1. 发明申请

WO1995016994A2 OPTICAL VOLUME MEMORY 审中-公开
标题翻译：光学记忆体
公开(公告)号：WO1995016994A2
公开(公告)日：1995-06-22
申请号：PCT/US1994014146
申请日：1994-12-09
申请人： MARTIN MARIETTA CORPORATION
发明人： MARTIN MARIETTA CORPORATION , CHEN, Wenpeng , GUHA, Shekhar , WORCHESKY, Terrance, L. , RITTER, Kenneth, J. , TADROS, Maher, E. , KANG, Keith
IPC分类号： G11C13/04
CPC分类号： G11C13/041 , Y10S428/913 , Y10S430/146 , Y10T428/21
摘要： An optical memory material includes a two-photon storage component which can be written from a first to a second state in response to WRITE light, mixed with a signal component which fluoresces by one-photon absorption only at the written locations in response to READ light. The storage material may be a fulgide. The memory material may also include a frequency upconversion material to aid writing. Writing is performed by a spatial light modulator (SLM) with a dynamic focussing system, for concentrating sufficient power at WRITE locations for nonlinear two-photon absorption. Crosstalk is avoided during simultaneous writing in some embodiments, by spacing the individual WRITE beams apart by an integer number of inter-beam spacings, so that non-adjacent datels are written simultaneously in a "paragraph", and the non-written areas are written at a different time with different paragraphs. The memory material may be translated relative to the SLM to access different paragraghs, or accessed by an electronically sparsed SLM. Reading uses a sheet of READ light traversing the pages of written material to cause the signal component to fluoresce, and imaging the fluorescent pattern onto a detector array. The memory material may be stacked in layers, spaced apart by light waveguides, for guiding the READ beam to the page to be read. In another embodiment, writing and erasure are performed by a modulated quasi-one-dimensional sheet of light, intersecting a second, unmodulated sheet of light at a column within the memory material.
摘要翻译：光学存储材料包括双光子存储组件，其可以响应于写入光而从第一状态到第二状态写入，仅响应于读取光而在写入位置处与单光子吸收发荧光的信号分量混合。存储材料可以是一种俘获物。存储器材料还可以包括用于辅助写入的上变频材料。写入由具有动态聚焦系统的空间光调制器（SLM）执行，用于在写入位置集中足够的功率用于非线性双光子吸收。在一些实施例中，通过将各个写入光束间隔开一整数的光束间距来避免在同时写入期间的串扰，使得非相邻的数据片被同时写入“段落”，并且非写入区域被写入在不同的段落与不同的段落。存储器材料可以相对于SLM被翻译以访问不同的paragrag，或者通过电子的sparsed SLM访问。读数使用一张通过写入材料页面的READ光线使信号分量发荧光，并将荧光图案成像到检测器阵列上。存储器材料可以堆叠成层，由光波导间隔开，用于将读取光束引导到要读取的页面。在另一个实施例中，写入和擦除通过调制的准一维光束进行，与存储器材料内的列处的第二未调制的光束相交。

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