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Design of high-resolution and multilevel reference pattern for improvement of both light utilization efficiency and signal-to-noise ratio in coaxial holographic data storage

机译:高分辨率和多级参考图案设计,可提高同轴全息数据存储中的光利用率和信噪比

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摘要

A high-resolution and multilevel designed reference pattern (DRP) is presented for improvement of both light utilization efficiency and the signal-to-noise ratio (SNR) of reconstructed images in coaxial holographic data storage. With a DRP, the desired Fourier power spectrum of a reference beam is obtained. Numerical and experimental results show that the DRP increases the SNR compared with that of a random phase mask (RPM). Moreover, the light utilization efficiency of the DRP is higher than that of a high-resolution RPM. In addition, the effect of the phase level and the pixel pitch of DRPs on the SNR and the light utilization efficiency are investigated.
机译:提出了一种高分辨率和多级设计参考图案(DRP),以提高同轴全息数据存储中重建图像的光利用效率和信噪比(SNR)。使用DRP,可以获得参考光束的所需傅立叶功率谱。数值和实验结果表明,与随机相位掩模(RPM)相比,DRP提高了SNR。此外,DRP的光利用效率高于高分辨率RPM。另外,研究了DRP的相位水平和像素间距对SNR和光利用效率的影响。

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