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Optical computing using interference filters as nonlinear optical logic gates and holographic optical elements as optical interconnects.

机译:使用干涉滤光片作为非线性光学逻辑门并使用全息光学元件作为光学互连的光学计算。

摘要

This dissertation experimentally explores digital optical computing and optical interconnects with theoretical supports, from the physics of materials and the optimization of devices to system realization. The trend of optical computing is highlighted with the emphasis on the current development of its basic constituent elements, and a couple of algorithms selected to pave the way for utilizing bistable devices for their optical implementations. Optical bistable devices function as "optical transistors" in optical computing. The physics of dispersive optical bistability is briefly described. Bistable ZnS interference filters are discussed in detail regarding their linear and nonlienar characteristics. The optimization of switching characteristics for a bistable ZnS interference filter is discussed, and experimental results are shown. Symbolic substitution which fully takes advantage of regular optical interconnects constitutes two steps: pattern recognition and symbol scription. Two experiments on two digital pattern recognitions and one on a simple but complete symbolic substitution have been demonstrated. The extension of these experiments is an implementation of a binary adder. A one-bit full adder which is a basic block for a computer has been explored experimentally and demonstrated in an all-optical way. The utilization of a bistable device as a nonlinear decision-making element is further demonstrated in an associative memory experiment by incorporating a Vander Lugt matched filter to discriminate two partial fingerprints. The thresholding function of a bistable device enhances the S/N ratio and helps discrimination in associative memory. As the clocking speed of a computer goes higher, e.g. greater than several GHz, the clock signal distribution and packaging become serious problems in VLSI technology. The use of optical interconnects introduces a possible solution. A unique element for holographic optical interconnects, which combines advantages of computer generated hologram and DCG recording material, is discussed. Pattern design of a specific computer generated hologram and a proposed fabrication process are described. Experimental results suggest that this unique element has the capability of being tailored to perform multiple fan-out with resulting uniform tightly-focussed spots, and coupling between devices, e.g. source-to-fiber and fiber-to-waveguides, etc.
机译:本文从材料的物理,器件的优化到系统的实现,从理论上探索了数字光学计算和光学互连的理论支持。光学计算的趋势突出强调了其基本组成元素的最新发展,并选择了一些算法来为将双稳态设备用于其光学实现铺平道路。光学双稳态器件在光学计算中充当“光学晶体管”。简要描述了分散光学双稳态的物理原理。讨论了双稳态ZnS干涉滤光片的线性和非线性特性。讨论了双稳态ZnS干涉滤波器的开关特性优化,并显示了实验结果。充分利用常规光学互连的符号替换包括两个步骤:图案识别和符号标注。已经证明了两个数字图案识别的两个实验,一个简单但完整的符号替换的实验。这些实验的扩展是二进制加法器的实现。实验研究了一种全位加法器,它是计算机的基本模块,并以全光方式进行了演示。通过结合范德·卢格特(Vander Lugt)匹配滤波器来区分两个部分指纹,在关联记忆实验中进一步证明了将双稳态设备用作非线性决策元件的情况。双稳态器件的阈值功能可以提高信噪比,并有助于区分关联存储器。随着计算机时钟速度的提高,例如频率超过几GHz时,时钟信号的分配和封装成为VLSI技术中的严重问题。光互连的使用引入了可能的解决方案。讨论了一种全息光学互连的独特元件,该元件结合了计算机生成的全息图和DCG记录材料的优点。描述了特定计算机生成的全息图的图案设计和建议的制造过程。实验结果表明,这种独特的元件具有被定制以执行多个扇出的能力,从而产生均匀的紧密聚焦的斑点,以及器件之间的耦合。源到光纤和光纤到波导等

著录项

  • 作者

    Wang Lon A.;

  • 作者单位
  • 年度 1988
  • 总页数
  • 原文格式 PDF
  • 正文语种 en
  • 中图分类
  • 入库时间 2022-08-20 20:35:21

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