A Littrow configuration ECL is designed, which features that the continuous tuning range is more than 3 GHz and the linewidth is less than 1 MHz.

• 然后介绍了半导体激光器外腔结构参量的具体设计,利用该设计得到了出射激光线宽小于1MHz、连续可调谐范围可达3GHz的780nm波段外腔半导体激光器。