Abstract

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

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