基于研制的1.5mm腔长InAs/InP共面条状量子点激光器,搭建了其镜面外腔结构,并对其光谱特性进行了测试,获得了镜面外腔周期性调制光谱,并在周期性的产生、多模激射和模式随电流的变化等方面对其光谱特性进行了分析研究。相比以前为获得单模使用的超短腔长超短外腔量子阱激光器,长腔长InAs/InP量子点激光器表现出较小的模式压缩比,更容易发生多模激射。
Based on self-made 1.5 mm InAs/InP QD laser,its spectrum characteristics modulated by mirror external-cavity are studied.The periodicity,the multimode lasing and the mode change of the spectrum versus current are explained.Contrast to short coupling-cavity quantum-well lasers used for single mode,long cavity-length InAs/InP QD lasers show smaller mode-compression and much easier multimode-lasing under the modulation of mirror external-cavity.