...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical engineering >Characterization of beam fanning in BaTiO_3 under biasing illumination and its application as log processor
【24h】

Characterization of beam fanning in BaTiO_3 under biasing illumination and its application as log processor

机译：偏光下BaTiO_3中束流扇形的表征及其作为对数处理器的应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We have theoretically investigated the dynamic range compression in a 45 deg-cut BaTiO_3 crystal. Modified coupled wave equations, which take into account different directions of scattered beams and the angle dependence of the coupling coefficient, are used. The same equations are employed to study the behavior of beam fanning with and without biasing illumination. Logarithmic operation is demonstrated using biasing illumination in the beam fanning geometery. Results indicate that there is a choice concerning the dynamic range of biasing illumination and the input range over which log operation is achieved. An all-optical configuration shows a very small dynamic range over which log operation can be obtained. A hybrid optoelectronic module of such a log processor is shown to have large operating range. Experimental results are presented to demonstrate the feasibility of this coricept. Once the given crystal is characterized to give a standard lookup table for logarithmic operation, the results can be applied to 2-D (image) information. A configuration is suggested for such a 2-D processor, which is expected to find applications in joint-transform correlation, analog computation, and logarithmic filtering.
机译：我们从理论上研究了45度切割BaTiO_3晶体中的动态范围压缩。使用了修正的耦合波方程，该方程考虑了散射光束的不同方向以及耦合系数的角度依赖性。使用相同的方程式来研究带有和不带有偏置照明的光束扇形的行为。在光束扇形几何中使用偏光照明演示了对数运算。结果表明，存在关于偏光照明的动态范围和实现对数运算的输入范围的选择。全光学配置显示了很小的动态范围，可以在该范围内进行对数运算。示出了这种对数处理器的混合光电模块具有较大的工作范围。实验结果表明，该coricept的可行性。一旦对给定的晶体进行了表征以提供用于对数运算的标准查找表，就可以将结果应用于二维（图像）信息。建议为此类2-D处理器配置，以期在联合变换相关，模拟计算和对数滤波中找到应用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号