A cross-shaped aperture is proposed to improve signal-to-noise ratio (SNR) in the holographic data stor age 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.
© 2009 Optical Society of America
Optical Data Storage
Original Manuscript: June 29, 2009
Revised Manuscript: October 14, 2009
Manuscript Accepted: October 14, 2009
Published: November 4, 2009
Huarong Gu, Songfeng Yin, Qiaofeng Tan, Liangcai Cao, Qingsheng He, and Guofan Jin, "Improving signal-to-noise ratio by use of a cross-shaped aperture in the holographic data storage system," Appl. Opt. 48, 6234-6240 (2009)