报道了一种具有垂直集成无源波导的耦合波导结构量子阱激光器的理论设计，它可以使垂直结平面方向的远场光束发散角得到有效的降低。通过数值计算分析，详细研究了结构参数对远场及阈值电流密度等的影响。结果表明，只需增加较小的阈值电流密度，即可使远场光束得到较大改善。经优化设计，可获得发散角为２１°的９８０ｎｍＩｎＧａＡｓ／ＡｌＧａＡｓ量子阱激光器结构。 A theoretical design of a coupled waveguide QWL with a vertically integrated passive waveguide is reported, which can effectively reduce the divergence angle of the far-field beam in the direction perpendicular to the plane. Through numerical calculation and analysis, the influence of structural parameters on far field and threshold current density has been studied in detail. The results show that only a small increase in the threshold current density, you can make the far-field beam to be greatly improved. Optimized design, 980nmInGaAs / AlGaAs quantum well laser structure with 21 ° divergence angle can be obtained.