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