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Research for Free-Space Optical Beam Control with Liquid Crystal

液晶自由空间光束控制研究

基本信息

批准号：
08650057
负责人：
KODATE Kashiko
金额：
$ 1.6万
依托单位：
Japan Women's University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650057/
关键词：
Free-space optical beam control Talbot effect Liquid crystall beam deflector Binary element Liquid crystal array Two-dimentional array illuminator Spatial phase modulator Optical waveguide array illuminator 大開口アレイイルミネータ液晶ビーム偏向器

项目摘要

The liquid crystal is considered as simple and efficient devices in the field of optical interconnects and optical computing. In the present research, we investigated the design and fabrication for free-space optical beam control device with liquid crystal in realtime. The main results throughout these two years' research since the Heisei 7th academic year, are presented below.1) Fabrication and characteristic estimation of array type liquid crystal optical beam device :We developed a homogeneous nematic liquid crystal panel using electrodes with distributed resistivity for the purpose of continuously modulating the wavefront either by a linear or quadratic function. The experimetal results show excellent congruity with the theoretical calculations. Furthemore, we designed and fabricated both spatial phase modulator unit cell and cell array incorporating electrodes with distributed resistivity.2) Efficient array illuminator for liquid crystal optical beam device :Based on the Talbot ef … More fect, we designed and fabricated a new type of array illuminators consisting of a multilevel phase grating crystal beam device with large subapertures, Details of the phase grating and the improved optical throughput are obtained.3) Desin and fabrication of two-dimentional illuminator :The extension to a two-dimensional illuminator is straightforward. By implementing on one plate a two-dimensional phase profile which consists of the phase sum of two one-dimensional Talbot plates but superimposed orthogonally, we can obtain intensity patterns for various SLM devices aperture ratios.4) Theoretical and experimental evaluation of waveguide array illuminators :We successfully confimed the theoretical results in an experiment demonstrating the existence of the high-contrast intensity distributions up to the edge of the waveguide. We concluded that waveguide array illuminators are expected to be useful for optical interconnects.5) Examination of two-dimentional liquid crystal optical beam devices :We obtained the concept of novel two-dimentional liquid crystal devices for efficient wavefront modulation with low electric power and high speed. Less

液晶被认为是光互连和光计算领域中简单而高效的器件。在本研究中，我们研究了实时液晶自由空间光束控制装置的设计和制造。平成第七学年以来这两年的主要研究成果如下：1）阵列型液晶光束器件的制造和特性估计：我们开发了一种使用具有分布电阻率的电极的均匀向列液晶面板，目的是通过线性或二次函数连续调制波前。实验结果与理论计算结果具有良好的一致性。此外，我们设计并制造了空间相位调制器晶胞和包含分布式电阻率电极的晶胞阵列。2）用于液晶光束器件的高效阵列照明器：基于塔尔伯特效应，我们设计并制造了一种新型阵列照明器，该阵列照明器由具有大子孔径的多级相位光栅晶体光束器件组成，相位光栅的详细信息和改进的光通量如下 3）二维照明器的设计和制造：二维照明器的扩展很简单。通过在一块板上实现由两个一维 Talbot 板的相位和正交叠加组成的二维相位分布，我们可以获得各种 SLM 器件孔径比的强度图案。4）波导阵列照明器的理论和实验评估：我们成功地在实验中证实了理论结果，证明了直到边缘的高对比度强度分布的存在波导的。我们得出结论，波导阵列照明器有望用于光学互连。5）二维液晶光束器件的检验：我们获得了新型二维液晶器件的概念，用于低电功率和高速的高效波前调制。较少的