注入电流对垂直腔面发射激光器横模特性的影响

对980nm氧化限制型垂直腔面发射激光器横模进行测试和研究，理论上从时间、空间变量的速率方程出发,利用空间积分法分析了典型电注入参数对弱折射率导引垂直腔面发射激光器(VCSELs)横模行为的影响,通过实验测试，得到VCSELs的横模光场分布情况，并与理论分析进行对比，得出相应的实验结果，在氧化孔径不变的情况下，随着注入电流的增加，载流子分布从有源区中心向边缘移动，模式从低阶基模向高阶模转变，并发生了较强的模式竞争以及载流子空间烧孔效应，最终导致基模强度的降低.另一方面，通过比较不同注入孔径下高阶模的发生时 关键词： 横模 垂直腔面发射激光器 空间烧孔现象 模式竞争

The influence of injection current on transverse mode characteristics of vertical-cavity surface-emitting lasers

The influence of transverse mode were researched with the injection current changing via experiments conducted with 980nm oxide-confined vertical cavity surface emitting lasers (VCSELs). Based on the spatio-temporal rate equation, the injection parameter dependence of the transverse mode characteristics of weak-index guiding VCSELs were theoretically researched by integrating the spatially dependent part. The result of the experiment indicated that the higher-order modes begin to emerge and exhibit strong competition with the injection current increased when the oxidized aperture was kept unchanged, and the distribution of the carrier transfers from the center to the edge. Furthermore, the main order becomes weaker because of the spatial hole burning. Compared with the appearance of higher-order modes with different oxidized aperture, the small injection aperture exhibits better single mode behavior.