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Design and fabrication of polarization-holographic elements for laser beam shaping

机译:用于激光束整形的偏振全息元件的设计与制造

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We report on an experimental realization of polarization-holographic optical elements (PHOEs) for laser beam shaping. The PHOEs were written into an azobenzene polymer layer by illumination with linearly polarized, focused light with spatially varying orientation. We propose a noniterative design method for the calculation of PHOEs that transform laser beams into arbitrary rotationally symmetric or separable intensity distributions such as flattop or ring profiles. The experimentally observed intensity distributions are compared with those predicted by numerical simulations based on the Fresnel diffraction approximation. Diffraction efficiencies up to 79percent were determined experimentally.
机译:我们报告了用于激光束成形的偏振全息光学元件(PHOE)的实验实现。通过用具有空间变化取向的线性偏振聚焦光照射,将PHOEs写入偶氮苯聚合物层。我们提出一种用于计算PHOE的非迭代设计方法,该方法会将激光束转换为任意旋转对称或可分离的强度分布,例如平顶或环形轮廓。将实验观察到的强度分布与通过基于菲涅耳衍射近似的数值模拟预测的强度分布进行比较。实验确定了高达79%的衍射效率。

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