1　前言激光器在光盘领域的应用和其它领域的应用相比占有较大比例 ,年使用量达 1亿支以上。红外半导体激光器由于价格低廉 ,因此在 CD和 CD- R中得到广泛应用 ,并继续向使用了红光半导体激光器的 DVD中引入。硬磁盘和半导体存储器的存储容量连续提高 ,数据存取和传输速率低的 1 Introduction Laser applications in the field of optical discs and applications in other areas account for a large proportion, the annual use of more than 100 million. Infrared semiconductor lasers are widely used in CDs and CD-Rs due to their low cost and continue to be introduced into DVDs using red semiconductor lasers. Hard disk and semiconductor memory storage capacity of continuous improvement, data access and transfer rate is low