Dynamic wave field synthesis: enabling the generation of field distributions with a large space-bandwidth product.
Dynamic wave field synthesis: enabling the generation of field distributions with a large space-bandwidth product.
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DOI：
10.1364/oe.23.028920
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发表时间：
2015-11
期刊：
影响因子：
3.8
通讯作者：
E. Kamau;Julian Heine;C. Falldorf;R. Bergmann
中科院分区：
文献类型：
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作者：
E. Kamau;Julian Heine;C. Falldorf;R. Bergmann
我们提出了一种新的设计和制作多路计算生成的体全息图(CGVH)的方法，该方法允许动态合成任意波场分布。为了实现这一目标，我们开发了一种由CGVH作为静态元件和电子寻址空间光调制器作为动态元件的混合系统。从而推导出描述全息图中非均匀介质材料内散射过程的新模型。该模型基于Rytov近似下散射过程的线性化，并结合了物理约束，这些约束解释了使用在非线性光学材料中微制造全息图的基于体素的激光光刻。在这篇文章中，我们证明了该系统基本上促进了1°量级的高角度布拉格选择性。此外，与计算机生成全息术的当前技术相比，它允许以更大的空间带宽积(SBWP≥8.7×10(6))对预定义波场进行低串扰的动态合成。
We present a novel approach for the design and fabrication of multiplexed computer generated volume holograms (CGVH) which allow for a dynamic synthesis of arbitrary wave field distributions. To achieve this goal, we developed a hybrid system that consists of a CGVH as a static element and an electronically addressed spatial light modulator as the dynamic element. We thereby derived a new model for describing the scattering process within the inhomogeneous dielectric material of the hologram. This model is based on the linearization of the scattering process within the Rytov approximation and incorporates physical constraints that account for voxel based laser-lithography using micro-fabrication of the holograms in a nonlinear optical material. In this article we demonstrate that this system basically facilitates a high angular Bragg selectivity on the order of 1°. Additionally, it allows for a qualitatively low cross-talk dynamic synthesis of predefined wave fields with a much larger space-bandwidth product (SBWP ≥ 8.7 × 10(6)) as compared to the current state of the art in computer generated holography.