In order to simplify the threshold determination,reduce the inter-pixel cross-talk,and improve the storage density for high-density volume holographic data storage,a two-dimensional constant-weight sparse modulation code is proposed.The evaluation criteria and design rules are investigated based on the page-oriented optical data storage system.Coding parameters are optimized to achieve large channel capacities.An 8:16 modulation code is designed to reduce the raw bit error rate and its performances are experimentally evaluated.A raw bit error rate of the magnitude of 10 4 is obtained with a single-data-page storage and 10 3 with multiplexing.
Hua-rong GU Liang-cai CAO Qing-sheng HE Guo-fan JIN
The wavelength and defocus margins for collinear holographic data storage system are theoretically analyzed ba...
Jianhua Li* a , Liangcai Cao a , Huarong Gu a , Xiaodi Tan b , Qingsheng He a , Guofan Jin a a State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing, 100084, China
