Write strategy investigation of multilevel optical storage in azobenzene liquid crystal polymer film

Jiangying Zhang; Hai Ming; Pei Wang; Yunxia Wu; Jiangping Xie; Jian Liu; Qijin Zhang; Guosheng Qi; Peng She; Duanyi Xu

doi:10.1117/12.483334

17 September 2002 The write strategy investigation of multi-level optical storage in azobenzene liquid crystal polymer film

Jiangying Zhang, Hai Ming, Pei Wang, Yunxia Wu, Jiangping Xie, Jian Liu, Qijin Zhang, Guosheng Qi, Peng She, Duanyi Xu

Author Affiliations +

Proceedings Volume 4930, Advanced Optical Storage Technology; (2002) https://doi.org/10.1117/12.483334
Event: Photonics Asia, 2002, Shanghai, China

Abstract

With the increasing demand of optical storage capacity, multi-level (ML) optical storage based on multi-level-amplitude modulation is receiving more and more attention, for it transmits more information ove a fixed bandwidth channel by using the available SNR more efficiently. We proposed an ML optical storage technology in azo LCP film based on polarization angle division. In this paper, the write strategy is developed by a ML write-compensation system that corrects for non-linearities of the data signal. The dynamic transmittance range is extended with the full monotonic range of angle and the varaition of each amplitude level relative to our dynamic range is improved. The experiments of imroved linear and nonlinear 16-level storage in azo LCP are demonstrated. The effects of thickness non-uniformity on linear and nonlinear 16-level storage are discussed.

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Jiangying Zhang, Hai Ming, Pei Wang, Yunxia Wu, Jiangping Xie, Jian Liu, Qijin Zhang, Guosheng Qi, Peng She, and Duanyi Xu "The write strategy investigation of multi-level optical storage in azobenzene liquid crystal polymer film", Proc. SPIE 4930, Advanced Optical Storage Technology, (17 September 2002); https://doi.org/10.1117/12.483334

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KEYWORDS

Optical storage

Polarization

Modulation

Polymers

Transmittance

Birefringence

Liquid crystals

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