Using a beacon in the free space laser communication system is an important method of finishing the acquisition course.The far-field distribution of a beacon affects seriously the acquisition time and acquisition probability. In order to satisfy practical performance requirements, it is necessary to design the far-field distribution of a beacon. First, the impact of a far-field Gaussian distribution beacon on the acquisition course of laser communication is analysed and the far-field uniform beacon has some advantage compared with the far field Gaussian beacon in the case of transmitting beam jitter. One kind of far-field uniform beacon model is developed on the base of combination of semiconductor lasers. The structure of the model is described, the operating principle of model is analysed and the far-field distribution expression of the beam is derived. Experiment's data indicate that transmitting power of the model is more than 3.8 W, the degree of non-uniformity is less than 11% and the coupling efficiency is 54%, so the feasibility of the model is proved.