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15 June 2020 Fast iterative phase retrieval in holographic data storage
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Proceedings Volume 11522, Optical Manipulation and Structured Materials Conference 2020; 115220T (2020) https://doi.org/10.1117/12.2573794
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan
Abstract
We present single-shot fast phase information retrieval without interferometry in the holographic data storage. Noninterferometry systems are more compact and stable than interferometric ones. Only single-shot of the intensity distribution on the Fourier plane is required to retrieve the phase information. Enhanced iterative Fourier transform algorithm (IFTA) was developed by applying embedded known phase data and phase only modulation as the prior constraints, which can be provided easily as the code rule in holographic data storage system. Strong intensity distribution on the Fourier plane reduces the requirement of high-power laser and high material diffractive efficiency. The bit-errorrate (BER) can be decreased to 0 in the simulation study. We realized BER without check code in the order of 10-2 for 4 level phase retrieval experimentally. The code rate is increased by 2.8 times using 4 level phase code compared to with amplitude code.
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Xiao Lin, Jianying Hao, Kun Wang, Xiaodi Tan, and Yuhong Ren "Fast iterative phase retrieval in holographic data storage", Proc. SPIE 11522, Optical Manipulation and Structured Materials Conference 2020, 115220T (15 June 2020); https://doi.org/10.1117/12.2573794
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