SBIR Phase I: Holographic Disk Data Storage on a New Photochromic Glass

这个小型企业创新研究的第一阶段项目来自New Span光电技术公司，研究了一种新型离子交换光致变色玻璃磁盘中的全息数据存储。众所周知，全息数据存储可以显著提高数据存储容量，减少访问时间。然而，全息数据存储技术的成熟被认为是由于缺乏良好的全息材料，这些材料可以在几乎无限的重写周期下进行光学擦除和记录，具有大容量复用数据记录的大索引调制，并且具有长寿命和抗破坏性读取的档案应用。本研究提出的新型离子交换光致变色玻璃有可能满足上述所有要求。紫外线和蓝色激光照射在玻璃上，可使交换层变为蓝色，而红色激光照射由于离子交换层中的去电离和电离作用，可使蓝色层变为紫红色。相关的折射率变化是全息数据存储的基础。记录介质在室内环境稳定、可擦除、可重写，且不需要任何后续处理。第一阶段将演示在新型离子交换玻璃上全息记录的可行性。第二阶段将优化全息记录工艺，并展示使用该玻璃的高容量全息存储原型。本研究将证明在一种新型离子交换光致变色玻璃磁盘上实现可擦除、可重写、高容量全息数据存储的可行性。全息记录不需要全息图固定过程，适合在线应用。新跨度光电技术公司提供的技术有望显著改善全息数据存储技术，用于商业和军事应用，如计算机数据存储、在线存储、图书馆档案应用、医疗应用的图像存储以及军事快速访问其大型智能数据库。

This Small Business Innovation Research Phase I project from New Span Opto-Technology Incorporated studies holographic data storage in a new ion-exchanged photochromic glass disk. It is well known that holographic data storage can significantly increase data storage capacity and reduce access time. However, the technology maturity of holographic data storage is believed to be impeded by the lack of good holographic material that can be erased and recorded optically with almost unlimited rewriting cycles, with large index modulation for large capacity multiplexed data recording, and with long lifetime and immunity to destructive readout for archival applications. The new ion-exchanged photochromic glass in this proposed study can potentially satisfy all of the above requirements. UV and blue laser illumination on the glass can make the exchanged layer blue while red laser illumination can convert the blue layer to violet-red due to de-ionization and ionization in the ion-exchanged layer. The associated refractive index change is the basis for the holographic data storage. The recording media is room environment stable, erasable, re-writable, and does not require any follow-up processing. Phase I will demonstrate the feasibility of holographic recording on the new ion-exchanged glass. Phase II will optimize holographic recording process and demonstrate a high-capacity holographic storage prototype using the glass.This research will demonstrate the feasibility of erasable, rewritable, high-capacity holographic data storage on a new ion-exchanged photochromic glass disk. The holographic recording does not require hologram fixing process and is suitable for on-line application. New Span Opto-Technology proffers technology that is expected to significantly improve the holographic data storage technology for commercial and military applications such as computer data storage, on-line storage, library archival applications, image storage for medical applications and for military fast access to its large intelligent database.