通过在全息数据存储系统中使用十字形孔径来提高信噪比。

Improving signal-to-noise ratio by use of a cross-shaped aperture in the holographic data storage system.

作者信息

Gu Huarong, Yin Songfeng, Tan Qiaofeng, Cao Liangcai, He Qingsheng, Jin Guofan

机构信息

State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing, 100084, China.

出版信息

Appl Opt. 2009 Nov 10;48(32):6234-40. doi: 10.1364/AO.48.006234.

DOI:10.1364/AO.48.006234

PMID:19904322

Abstract

A cross-shaped aperture is proposed to improve signal-to-noise ratio (SNR) in the holographic data storage system (HDSS). Both simulated and experimental results show that higher SNR can be achieved by the cross-shaped aperture than traditional square or circular apertures with the same area. A maximum gain of 20% in SNR is obtained for the optimized cross-shaped aperture. The sensitivities to pixel misalignment and magnification error are also numerically compared.

摘要

提出了一种十字形孔径以提高全息数据存储系统（HDSS）中的信噪比（SNR）。模拟和实验结果均表明，与具有相同面积的传统方形或圆形孔径相比，十字形孔径能够实现更高的信噪比。对于优化后的十字形孔径，信噪比可获得高达20%的最大增益。还对像素对准误差和放大误差的敏感度进行了数值比较。