全像儲存系統之可連續變化之時間序列訊號

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姓名

葉佳凱(Jia-Kai Ye) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

全像儲存系統之可連續變化之時間序列訊號
(Continuously Variable Time Series Signal in Holographic Data Storage System)

相關論文

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至系統瀏覽論文 (2029-8-1以後開放)

摘要(中)

傳統全像儲存架構在進行多工記錄時，會隨著記錄頁數的增加，讀取時的繞射效率呈平方倍數下降。在讀寫過程中，各軌道的間距會受到記錄頁數的限制，導致在同樣範圍內能記錄的資訊量減少。此外，頁與頁之間的串音限制使得頁面間距不能太近，而過大的頁面間距會大幅增加馬達的轉矩。不僅如此，系統對於讀取位置的靈敏度要求極高，必須非常接近寫入位置才能讀取出資訊，因此在機械限制下，要達到高速且精準的讀取過程是非常困難的。
本論文提出的全像儲存系統克服了上述所提到的問題，通過改變傳統記錄和讀取的方式，不僅改善了多工記錄繞射效率受到M/#限制的情況，還改善了系統對於讀取位置高靈敏度的要求。此系統將多頁的資訊記錄在同一記錄區域中，並透過設計各組光柵的訊號光相位，得到位移疊加讀取的訊號，在不同位置下的干涉結果。

摘要(英)

In traditional holographic storage systems, the diffraction efficiency during readout decreases exponentially as the number of recorded pages increases. The spacing between tracks during the read-write process is constrained by the number of recorded pages, which reduces the amount of information that can be stored within the same area. Furthermore, crosstalk between pages restricts how close the pages can be, while excessively large page spacing significantly increases the motor′s torque. Additionally, the system requires extremely high sensitivity to the readout position, necessitating very close proximity to the write position to retrieve information. Therefore, achieving high-speed and precise readout processes is extremely challenging under mechanical constraints.
This thesis proposes a holographic storage system that overcomes the aforementioned issues. By altering the traditional recording and readout methods, this system not only improves the diffraction efficiency of multiplexed recordings, which is limited by the M/#, but also reduces the system′s sensitivity to the readout position. This system records multiple pages of information within the same recording area and, by designing the signal light phases of each set of gratings, achieves displacement-added readout signals, resulting in interference at different positions.

關鍵字(中)

★ 全像儲存
★ 體積全像
★ 角度選擇性
★ 相位補償項

關鍵字(英)

★ Holographic data storage
★ Volume Holography
★ Angular Selectivity
★ Phase Compensation Term

論文目次

摘要 I
ABSTRACT II
致謝 IV
目錄 V
圖目錄 VIII
表目錄 XVIII
第一章緒論 1
1-1 研究動機 1
1-2 全像術簡介 3
1-3 全像儲存發展 4
1-4 本論文之前置研究 5
1-5 本論文架構 6
第二章體積全像原理 7
2-1 全像術 7
2-2 布拉格條件 10
2-3 布拉格簡併 13
2-4 耦合波理論 14
2-5 相位疊加法 22
2-6 體積全像片的角度選擇性 24
2-7 M-NUMBER與全像儲存系統限制 26
第三章儲存系統設計 30
3-1 系統架構 30
3-1-1 實驗架構 30
3-1-2 訊號調製 33
3-2 多工角度設計 35
3-3 參考光相位補償 36
3-4 系統的繞射效率提升M倍 39
第四章多工記錄四頁疊加讀取實驗 42
4-1 實驗設計 42
4-2 四道參考光與訊號光設計 45
4-2-1 參考光設計 45
4-2-2 訊號光相位設計 46
4-3 實驗結果 55
4-4 實驗繞射效率 76
第五章結論 81
參考文獻 84
附錄A 87
中英文名詞對照表 91

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指導教授

楊宗勳余業緯(Tsung-Hsun Yang Yeh-Wei Yu)

審核日期

2024-8-13

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