Research Initiation: Volume Holographic Optical Interconnection

研究启动：体全息光互连

• 批准号: 8810288
• 负责人: Hyuk Lee
• 金额: --
• 依托单位: Polytechnic University of New York
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-15 至 1990-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8810288&HistoricalAwards=false
• 关键词: Research; Initiation; Volume; Holographic; Optical

Optical interconnecting elements can potentially act as a powerful alternative to electrical wiring, because photons lack the interactive nature of electrons. As a result, photonic interconnections offer minimal signal deterioration, immunity to parasitic (capacitive or inductive) loading, and insensitivity to EMI, amongst other advantages. Current optical interconnects are based primarily on optical fibers, on planar configurations of the thin-film holographic type or on optical spatial light modulators which can perform matrix- vector or matrix-matrix multiplications. However, the interconnection capacity of schemes using thin holograms is restricted by the area of the hologram and the operating efficiency is limited by the narrow interaction region of the film thickness. On the other hand, optical interconnection systems based on spatial light modulators are complicated and bulky. The work projected here is a theoretical and experimental investigation of a recently proposed three-dimensional class of photonic interconnections utilizing photorefractive crystals. These novel configurations are based on volume (rather than planar) holographic geometries. Their operation involves a composite Bragg- reflection mechanism provided by a large multiplicity of holographic gratings; the gratings are generated inside the volume by the optical inputs themselves according to a prescribed interconnection pattern.

由于光子缺乏电子的相互作用性质，光学互连元件有可能成为电线的强大替代品。因此，光子互连提供最小的信号恶化，抗寄生（电容或电感）负载，对EMI不敏感，以及其他优点。当前的光互连主要基于光纤、薄膜全息型的平面结构或可执行矩阵-矢量或矩阵-矩阵乘法的光学空间光调制器。然而，使用薄全息图的方案的互连能力受到全息图面积的限制，而工作效率则受到薄膜厚度的狭窄相互作用区域的限制。另一方面，基于空间光调制器的光互连系统复杂且体积庞大。本文的工作是对最近提出的利用光折变晶体的三维光子互连进行理论和实验研究。这些新颖的结构是基于体积（而不是平面）全息几何。它们的操作涉及由大量全息光栅提供的复合布拉格反射机制；根据规定的互连模式，由光输入本身在体积内部产生光栅。