采用柱透镜对半导体激光器（ＬＤ）的输出光束进行了有效收集、预准直及多模光纤之间的耦合实验。采用８０８ｎｍ波长，１５０μｍ条宽结构的激光器件，与２００μｍ芯径平端光纤的耦合效率高达９０％以上，光纤输出功率为１．０Ｗ。分析了影响耦合效率的主要因素 The cylindrical lens was used to collect the output beam of the semiconductor laser (LD) effectively. The experiment of pre-alignment and multimode fiber coupling was carried out. Using 808nm wavelength, 150μm width of the structure of the laser device, and 200μm core diameter flat-side fiber coupling efficiency as high as 90%, the optical fiber output power of 1.0W. The main factors affecting the coupling efficiency are analyzed