垂直腔面发射激光器(VCSEL)具有低阈值电流、圆形光斑、高调制带宽、易于单纵模激射以及高密度二维光集成等优势。在实际应用中,单横模VCSEL是光通信、高速局域网、光互连等许多应用领域的理想光源。在分析VCSEL的结构特性和模式特性的基础上,详述了单横模VCSEL近年来取得的重要进展,分析了各种单横模技术的优势与不足,概述了器件广阔的应用前景及仍待解决的问题。 Vertical cavity surface emitting lasers (VCSELs) have the advantages of low threshold current, circular spot, high modulation bandwidth, easy single-mode lasing and high-density two-dimensional optical integration. In practical application, single cross-mode VCSEL is the ideal light source for many applications such as optical communications, high-speed local area network and optical interconnection. Based on the analysis of the structural characteristics and mode characteristics of VCSEL, the important progress of single-transverse-mode VCSEL in recent years is described in detail. The advantages and disadvantages of various single-transverse mode techniques are analyzed. The broad application prospect and pending solved problem.