Improving signal-to-noise ratio by use of a cross-shaped aperture in the holographic data storage system.
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.
Gu
Huarong
H
State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing, 100084, China. ghr00@mails.tsinghua.edu.cn
Yin
Songfeng
S
Tan
Qiaofeng
Q
Cao
Liangcai
L
He
Qingsheng
Q
Jin
Guofan
G