R&D: Dynamic Sampling Iterative Phase Retrieval for Holographic Storage

Optics Express (OSA) has published an article written by Ruixian Chen, Jianying Hao, Changyu Yu, Qijing Zheng, Xianying Qiu, Suping Wang, Yuxin Chen, College of Photonic and Electronic Engineering, Fujian Normal University, Minhou District, Fuzhou, 350117, China, Kun Wang, College of Photonic and Electronic Engineering, Fujian Normal University, Minhou District, Fuzhou, 350117, China, and Fujian Provincial Key Laboratory of Photonics Technology, Fuzhou 350117, China, Dakui Lin, Yi Yang, Hui Li, Xiao Lin, and Xiaodi Tan, College of Photonic and Electronic Engineering, Fujian Normal University, Minhou District, Fuzhou, 350117, China.

Abstract: “A dynamic sampling iterative phase retrieval method, which dynamically samples the Fourier intensity distribution of the reconstruction beam captured by the detector, is proposed to shorten the iterative number and decrease the phase error rate of phase retrieval in the phase-modulated holographic data storage. By the dynamic sampling method, that keeping relatively low frequency component of Fourier intensity spectrum at the beginning of iteration and gradually releasing more high frequency component at the subsequent iterations, we shortened the iterative number by 2 times and decreased the phase error rate to some extent because our method provided a better convergent path to the phase retrieval. We also believe the thought of our method can be used in more image retrieval fields.“