A high-resolution and multilevel designed reference pattern (DRP) is presented for improvement of both light utilization efficiency and the signal-to-noise ratio (SNR) of reconstructed images in coaxial holographic data storage. With a DRP, the desired Fourier power spectrum of a reference beam is obtained. Numerical and experimental results show that the DRP increases the SNR compared with that of a random phase mask (RPM). Moreover, the light utilization efficiency of the DRP is higher than that of a high-resolution RPM. In addition, the effect of the phase level and the pixel pitch of DRPs on the SNR and the light utilization efficiency are investigated.
© 2014 Optical Society of America
Original Manuscript: March 13, 2014
Revised Manuscript: May 9, 2014
Manuscript Accepted: May 9, 2014
Published: June 10, 2014
Teruyoshi Nobukawa and Takanori Nomura, "Design of high-resolution and multilevel reference pattern for improvement of both light utilization efficiency and signal-to-noise ratio in coaxial holographic data storage," Appl. Opt. 53, 3773-3781 (2014)