当采用有限孔径接收时,在实用距离上接收光斑的范围内,总是存在接收光功率起伏不相关的子域,从而证明了光分集接收技术改善接收信号的可行性。我们在2.9km的距离上,作了分集接收实地试验。所试验的激光波长为10.6μm CO_2激光,接收端配置了二台φ200mm的卡塞格仑望远镜,它们的焦点上分别配置了一个热电探测器检测光信号,输出的电信号经放大后进行等增益合并。合并前后的信号都用PDP-11/24计算机进行数据处理。在处理的 When using finite aperture receiver, there is always a subdomain of unrelated received power fluctuation in the range of receiving light spot at practical distance, which proves the feasibility of optical diversity receiving technology to improve the received signal. We conducted a diversity reception field test at a distance of 2.9km. The experimental laser wavelength of 10.6μm CO_2 laser, the receiving end is equipped with two sets of φ200mm Cassegrain telescope, the focus of their respective pyroelectric detector configured to detect optical signals, the output of the electrical signal after amplification for equal gain merge. The signals before and after the merger were processed by a PDP-11/24 computer. In processing