Abstract

Two methods are proposed to improve the readout quality of signals in self-referential holographic data storage (SR-HDS), in which no reference beam is required to record and read digital data holographically: the off-the-focus (OtF) method and the oversampling additional pattern (OsAP) method. The focal point is located outside of the recording medium in the OtF method, and the signal pattern is recorded with an additional pattern that possesses a higher spatial frequency than the signal pattern in the OsAP method. Experimental results show that both methods are effective for drastically improving the signal-to-noise ratio (SNR). In addition, through numerical simulation, it can be observed that the readout quality is improved by the achievement of homogeneous hologram distribution.

© 2015 Optical Society of America

Shift-multiplexed self-referential holographic data storage

Masanori Takabayashi, Atsushi Okamoto, Taisuke Eto, and Takashi Okamoto
Appl. Opt. 53(20) 4375-4381 (2014)

Self-referential holography and its applications to data storage and phase-to-intensity conversion

Masanori Takabayashi and Atsushi Okamoto
Opt. Express 21(3) 3669-3681 (2013)

Volume-recorded hologram modeling, point-spread function analysis, and segmented adaptive equalization for holographic data storage

Makoto Hosaka, Toshiki Ishii, and Taku Hoshizawa
Appl. Opt. 58(17) 4678-4686 (2019)

Homodyne readout on dc-removed coaxial holographic data storage

Shin Yasuda, Yasuhiro Ogasawara, Jiro Minabe, Katsunori Kawano, and Kazuhiro Hayashi
Appl. Opt. 48(36) 6851-6861 (2009)

Formularization and simulation of Bragg selectivity of readout signals in angular-multiplexing holographic data storage

Tatsuro Ide
Appl. Opt. 55(10) 2664-2674 (2016)