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研究生: 許哲誌
Che-chih Hsu
論文名稱: 離軸式體積全像儲存系統架構之研究
The study of off-axis volume holographic data storage system
指導教授: 孫慶成
Ching-cheng Sun
口試委員:
學位類別: 碩士
Master
系所名稱: 理學院 - 光電科學與工程學系
Department of Optics and Photonics
畢業學年度: 96
語文別: 中文
論文頁數: 99
中文關鍵詞: 全像儲存儲存系統離軸式
外文關鍵詞: data storage, Holographic, off-axis
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  • 在本文中,我們針對發展出的離軸式體積全像儲存系統架構做了一點改良,推導其數學模型,並利用此數學模型模擬計算系統在多工儲存時多頁及多軌間的串音影響及位元誤碼率。我們也提出一多點光源球面波參考光的概念,能有效降低多頁儲存時,隨碟片旋轉而上升的雜訊頁繞射效率。最後,我們計算此系統的理論儲存容量,並針對某些參數作優化,有效的提升了系統的儲存容量及讀取品質。


    In the thesis, we made an improvement for our off-axis volume holographic optical system. The mathematical model is also derived to simulate the system. Based on the model, we calculated the cross-talk effect and bit-error rate of the multiplexing recording system in tangential and radial directions. We also proposed a new concept that we use multiple spherical waves as the reference beam to reduce the diffraction efficiency of the noise page during disk rotation. In the end we estimated the system capacity and optimized some parameters to improve the capacity and reading quality.

    摘要................................................I ABSTRACT...........................................II 圖索引.............................................VI 表索引...........................................VIII 第一章 緒論........................................ 1 1.1 全像之發展與儲存系統簡介....................... 3 1.2 論文大綱與安排................................. 6 第二章 原理介紹.................................... 8 2.1 布拉格條件..................................... 8 2.2 理論分析...................................... 12 2.2.1 耦合波理論.................................. 12 2.2.2 相位疊加法.................................. 20 2.3 位元誤碼率.................................... 24 第三章 離軸式全像儲存系統架構..................... 28 3.1 系統架構...................................... 28 3.2 繞射光場之近似解析解.......................... 31 3.2.1 空間調制器之近似模型........................ 31 3.3 位移補償系統.................................. 35 3.4 系統架構之改進................................ 35 3.4.1 位移補償系統................................ 37 3.5 共軛球波參考光之相位補償...................... 38 第四章 單一記錄頁面之行為......................... 40 4.1 布拉格選擇性.................................. 40 4.2 繞射光隨碟片旋轉在CCD 上之表現................ 41 4.3 隨碟片旋轉之CCD 上累計能量疊加結果............ 49 4.4 結論.......................................... 54 第五章 位移多工之多頁與多軌間串音................. 55 5.1 切線與徑向之布拉格選擇性...................... 56 5.2 切線方向上之多頁串音.......................... 57 5.2.1 最大影響頁數................................ 58 5.2.2 切線上多頁串音隨碟片旋轉之表現.............. 61 5.3 徑向上的多軌串音.............................. 66 第六章 多點光源球面波參考光......................67 6.1布拉格選擇性對多頁串音之影響....................67 6.2 雙點光源球面波參考光之布拉格位移選擇性.........69 6.3多點光源球面波參考光之布拉格位移選擇性..........73 6.4 雙點光源情況下反相位讀取之情形.................75 6.4.1 雙點光源參考光位於同側之表現.................75 6.4.2雙點光源參考光位於異側之表現..................76 第七章 系統容量之估算與最佳化....................79 7.1 布拉格選擇性...................................79 7.2 畫素響應函數...................................81 7.3系統容量之估算..................................83 7.4 系統容量之提升.................................84 第八章 結論......................................89 參考文獻...........................................91 中英文對照表.......................................94

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