目前信息的光和磁光记录与读出系统是非常重要的产品，它占高速增长的半导体激光市场的五分之一（2000年为60亿美元，增长率为108%）。这部分市场需要辐射波长尽量短的发光器件。CD-ROM装置使用的辐射波长由780 nm过渡至650 nm（DVD-ROM），信息写入密度提高了20倍。进一步减小 Current information on optical and magneto-optical recording and readout systems is a very important product, accounting for one fifth of the rapidly growing semiconductor laser market ($ 6 billion in 2000, a 108% increase). This part of the market needs to be as short as possible radiation wavelength light-emitting devices. The radiation wavelength used by the CD-ROM device is transitioned from 780 nm to 650 nm (DVD-ROM) and the information writing density is increased by a factor of 20. Further reduce