A study of microholographic data storage

• Main Authors: Kuo-Jui Wu, 吳國瑞
• Other Authors: Wei-Chia Su
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/08598656502166120450

碩士 === 國立彰化師範大學 === 物理學系 === 98 === In this thesis, we simulated the microholograting numerical model and demonstrated microholographic data storage system. By the simulation and the experiment, we calculate the lateral shifting sensitivity is 1.36μm, longitudinal shifting is 12μm. In condition of single wavelength and single storage layer, we can estimate the storage density is 0.54bits/μm2. The storage density rises up significantly via combining multilayer and wavelength multiplexing methods. In experiment verifying, we used single wavelength and storage 20 layers in photopolymer PQ-PMMA, the storage density comes to 10.8bits/μm2. Furthermore, we confirm the feasibility of wavelength multiplexing in microholographic data storage. If we use bi-wavelength and storage 20 layers in Lithium Niobate, the storage density comes to 21.6bits/μm2 in theoretical. We orientate microholographic data storage as a transitional product between blu-ray disc (BD) and holographic versatile disc (HVD). Comparing to holographic data storage system, it pruned the space light modulator (SLM) and charge couple device (CCD). Therefore microholographic data storage system is much cheaper than HVD system and totally downward compatible with current BD and DVD data processing system. The capacity of microholographic data storage system comes to several times than BD system.