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Correlator-aided alignment of phase key in encrypted holographic storage systems |
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| Authors: | Wei-Hung Su Hung-Jei Kao |
| Institution: | a Department of Materials Science and Optoelectronic Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan b Graduate Institute of Photonics, National Changhua University of Education, No. 1, Jin-De Road, Changhua 500, Taiwan c Graduate School of Optoelectronics, National Yunlin University of Science & Technology, Yunlin 640, Taiwan |
| Abstract: | An encrypted holographic scheme with a compact alignment system for a phase key is proposed. Alignment for a phase key is performed by a holographic correlator. A filter in the correlator system contains the phase information used for encryption. Thus, it can be used to check the authorization of the phase key. Owing to the shift-invariant property of the holographic correlator, the location of the correlation peak is highly related to the alignment of the phase key. Therefore, the phase key can be repositioned on the desired location by searching for the specific position of the correlation peak. With the help of the correlator, alignment of the phase key can be done in 1 min. Experimental results using a correlator system in support of our proposed idea are demonstrated as well. |
| Keywords: | 42 40 Pa 42 30 Kq 42 79 Hp 42 30 Ms |
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