Open AccessOrthogonal polarization dual-channel holographic memory in cationic ring-opening photopolymer
Author(s) -
Hongping Wei,
Liangcai Cao,
Xu Zhou,
Qingsheng He,
Guofan Jin,
Changzhi Gu
Publication year - 2006
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.005135
Subject(s) - holography , optics , multiplexing , channel (broadcasting) , crosstalk , holographic data storage , diffraction grating , materials science , grating , optical storage , diffraction efficiency , polarization (electrochemistry) , 3d optical data storage , computer data storage , computer science , physics , computer hardware , telecommunications , chemistry
A dual-channel holographic recording technique and its corresponding memory scheme in the cationic ring-opening photopolymer are presented. In the dual-channel technique, a pair of holograms are recorded simultaneously with two orthogonal polarization channels in the common volume of the material, and are reconstructed concurrently with negligible inter-channel crosstalk. The grating strengths of these two channels are investigated and the relevant parameters for equal diffraction intensity readout are optimized. Combining the dual-channel technique with speckle shift multiplexing, a high-density holographic memory is realized. This dual-channel scheme enables the users to interact with the storage medium from an additional channel. The simultaneous nature of the two channels also offers a faster data transfer rate in both the recording and reading processes.