Study on Collinear Holographic Storage System with Orthogonal Phase Encryption

Haiyang Song; Jianan Li; Linlin Fan; Dakui Lin; Kun Wang; Xiao Lin; Xiaodi Tan

doi:10.3788/CJL230696

Chinese Journal of Lasers, Volume. 50, Issue 18, 1813017(2023)

Study on Collinear Holographic Storage System with Orthogonal Phase Encryption

Haiyang Song^1,2, Jianan Li^1,2, Linlin Fan^1,2, Dakui Lin^1,2、*, Kun Wang^1,2, Xiao Lin^1,2, and Xiaodi Tan^1,2、**

¹Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, Fujian, China

²Fujian Provincial Key Laboratory of Photonics Technology, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, Fujian, China

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Abstract Get PDF(in Chinese)

Figures & Tables(13)

Fig. 1. Principle of orthogonal phase encryption. (a) Correct key; (b) orthogonal key

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Fig. 2. Orthogonal phase encrypted-coaxial holographic data storage system

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Fig. 3. Unexposed reflective holographic storage material

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Fig. 4. Sector orthogonal phase coding mode

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Fig. 5. Random orthogonal phase coding mode

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Fig. 6. Upload patterns of SLM

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Fig. 7. Upload patterns of A-SLM used to test safety

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Fig. 8. Read results of SOPCR and ROPCR under Key 3.(a)SOPCR; (b) ROPCR

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Table 1. Phase key generation of reference optical unit
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Table 1. Phase key generation of reference optical unit
Reference unit Key 1 Key 2 Key 3 Key 4 Key 5 Key 6 Key 7 Key 8
Unit 1 0 0 0 0 0 0 0 0
Unit 2 0 π π 0 π 0 π 0
Unit 3 0 0 π π 0 0 π π
Unit 4 0 π 0 π π 0 0 π
Unit 5 0 0 0 0 π π π π
Unit 6 0 π π 0 0 π 0 π
Unit 7 0 0 π π π π 0 0
Unit 8 0 π 0 π 0 π π 0

Table 2. Correlation coefficients of reconstructed optical holograms under SOPCR
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Table 2. Correlation coefficients of reconstructed optical holograms under SOPCR
Hologram S₁ S₂ S₃ S₄ S₅ S₆ S₇ S₈
S₁ 1 0.63 0.63 0.56 0.81 0.54 0.55 0.44
S₂ 1 0.57 0.59 0.59 0.71 0.32 0.58
S₃ 1 0.66 0.58 0.41 0.69 0.63
S₄ 1 0.40 0.61 0.59 0.82
S₅ 1 0.46 0.48 0.42
S₆ 1 0.46 0.58
S₇ 1 0.64
S₈ 1

Table 3. Correlation coefficients of reconstructed optical holograms under ROPCR
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Table 3. Correlation coefficients of reconstructed optical holograms under ROPCR
Hologram S₁ S₂ S₃ S₄ S₅ S₆ S₇ S₈
S₁ 1 -0.01 0 0.02 -0.03 -0.04 -0.03 -0.02
S₂ 1 0.04 -0.01 -0.04 0.04 -0.05 0.05
S₃ 1 -0.03 -0.03 -0.04 -0.03 -0.03
S₄ 1 -0.04 0.02 -0.03 0.03
S₅ 1 -0.07 -0.06 -0.07
S₆ 1 -0.07 -0.07
S₇ 1 -0.04
S₈ 1

Table 4. Mean square errors of reconstructed optical holograms under SOPCR
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Table 4. Mean square errors of reconstructed optical holograms under SOPCR
Hologram S₁ S₂ S₃ S₄ S₅ S₆ S₇ S₈
S₁ 0 390 449 502 178 479 680 719
S₂ 0 543 498 429 325 894 578
S₃ 0 452 495 742 440 533
S₄ 0 664 475 572 256
S₅ 0 559 645 731
S₆ 0 710 570
S₇ 0 532
S₈ 0

Table 5. Mean square errors of reconstructed optical holograms under ROPCR
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Table 5. Mean square errors of reconstructed optical holograms under ROPCR
Hologram S₁ S₂ S₃ S₄ S₅ S₆ S₇ S₈
S₁ 0 962 916 1501 975 1834 1245 1155
S₂ 0 1033 1588 1079 1959 1332 1061
S₃ 0 1870 1351 2159 1593 1301
S₄ 0 1931 2723 2125 1871
S₅ 0 2224 1657 1360
S₆ 0 2385 2150
S₇ 0 1585
S₈ 0

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Haiyang Song, Jianan Li, Linlin Fan, Dakui Lin, Kun Wang, Xiao Lin, Xiaodi Tan. Study on Collinear Holographic Storage System with Orthogonal Phase Encryption[J]. Chinese Journal of Lasers, 2023, 50(18): 1813017

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