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近年来,对于光存储容量的需求越来越大,许多新 的技术也随之涌现。进一步减小激光器波长,采用大数 值孔径透镜是行之有效的方案,很容易在下一代光存储 行业中得以应用。而多阶存储技术的应用可以进一步 增大光存储容量和数据传输率。目前,提出并设计了一 种多阶蓝光存储系统,使用405nm半导体激光器和数值 孔径为0．95的物镜。其中使用GaN材料制作的波长 405nm的蓝光半导体激光器,目前仅有日亚等极少数公 司能够生产,但并不提供驱动芯片。因此,自行设计多 阶读写驱动电路,是完成多阶蓝光存储系统的关键。
In recent years, the demand for optical storage capacity has been growing, and many new technologies have emerged. To further reduce the laser wavelength, using a large numerical aperture lens is an effective solution that can easily be applied in the next generation of optical storage. The application of multi-level storage technology can further increase the optical storage capacity and data transfer rate. At present, a multi-stage blue light storage system is proposed and designed using a 405 nm semiconductor laser and an objective lens with a numerical aperture of 0.95. Among them, a blue semiconductor laser with a wavelength of 405 nm made of GaN material is currently available only in a handful of companies such as Nichia, but no driver chip is provided. Therefore, to design multi-level read-write driver circuit, is the key to complete multi-stage Blu-ray storage system.