[OPTICAL REVIEW Vol. 14, No. 4 (2007) 214-218]
© 2007 The Optical Society of Japan

Deterministic Phase Encoded Holographic Data Storage Using Lenticular Lens Array

Chi Ching CHANG*, Gu Liang CHEN1, Wen Kuei YOUNG1, Ching Yang LIN2, and Hon Fai YAU2

Department of Computer Science and Information Engineering, Ming Dao University, Peetow, Chunghua 52345, Taiwan, R.O.C.
1School of Defense Science, National Defense University, Tashi, Taoyuan 33509, Taiwan, R.O.C.
2Department of Optics and Photonics, National Central University, Chungli, Taoyuan 33201, Taiwan, R.O.C.

(Received February 1, 2007; Accepted May 28, 2007)

This work presents a novel optical holographic encrypted data storage approach based on a phase encoding multiplexed scheme. In the proposed data storage scheme, patterns to be encrypted are stored holographically in a photorefractive LiNbO3:Fe crystal using a lenticular lens array (LLA) sheet phase-encoded multiplexing. Experimental results reveal that rotating an LLA placed as a phase modulator in the path of the reference beam is a simple but effective method of increasing the phase addresses for holographic memory in a crystal. Combining this rotational multiplexing with two-axis rotating multiplexing provides further data storage and data encryption capacity.

Key words: data storage, phase encoding, lenticular lens array, encryption, holographic memory

*E-mail address: chichang@mdu.edu.tw