RESEARCH ON INTEGRATED SUPER-RESOLUTION READOUT DEVICES FOR HIGH-DENSITY OPTICAL MEMORY

本项目旨在研究基于超分辨率技术为未来高密度光存储系统实现高性能集成光学读出器件的可能性。主要研究成果如下：1.对集成光学拾取器件的超分辨率读出进行了理论分析。阐明了器件的理论性能和优化的器件参数。从理论上探讨了并行数据采集器实现超分辨率的可能性。制作了一个样机，并对其读出特性进行了测试。提出了共焦扫描显微镜的集成光学实现方案，并对与超分辨率相关的共焦读出特性进行了实验验证。对用于光存储的各种波导型倍频器件进行了理论分析。制作了LiNbO_3波导准相位匹配倍频器件，获得了高质量的输出光斑和较高的归一化效率。提出了一种基于电光聚合物光波导的聚焦光强分布调制器，并对其可行性进行了实验验证。设计并制作了用于未来激光二极管与AlGaAs光波导单片集成的光栅元件，并论证了其可行性。

This project aimed at studying the possibility of implementing high-performance integrated-optic readout devices for future high-density optical memory systems based upon the super resolution technique. The obtained results are summarized as follows :1. Theoretical analysis was made on super-resolution readout by integrated-optic pickup devices.2. The theoretical performances and optimized device parameters were clarified.3. Possibility of super resolution in parallel data pickup device was theoretically discussed.4. A prototype pickup device was fabricated and the readout characteristics were examined.5. Integrated optic implementation of confocal scanning microscope was proposed, and the confocal readout characteristics related to the super-resolution are experimentally demonstrated.6. Theoretical analysis was made on various types of waveguide SHG devices for application to optical memory. A LiNbO_3 waveguide quasi phase matched SHG device was fabricated and a high quality output spot and a high normalized efficiency was demonstrated.7. A focus intensity profile modulator using electrooptic polymer waveguide was proposed and the possibility was experimentally demonstrated.8. Grating components for future monolithic integration with laser diode in AlGaAs waveguide was designed and fabricated, and the feasibility was demonstrated.