研究了部分相干高斯谢尔模式（GSM）光束的湍流角扩展对接收光功率的影响，对激光角扩展和通信链路接收端光功率进行数值计算和模拟，并定量分析了角扩展对激光通信链路接收功率的影响。研究结果表明，在部分相干GSM光束下接收端功率随着光束束腰半径、空间相干长度和传输距离的增加而减小，随波长的增大而增大。在此基础上，把部分相干GSM光束与完全相干高斯光束进行对比，对比结果表明，部分相干GSM光束因扩展引起的功率损耗小于完全相干高斯光束，在一定初始参数条件下，部分相干光束接收到的功率是完全相干光束的2.65倍。

The effects of the expansion angle of partially coherent Gaussian-Schell (GSM) beam on the receiving optical power are analyzed, numerical calculation and simulation are used in the laser extension angle and the receiving optical power of the laser communication link, and at the same time the influence of the beam′s expansion angle on the power of the laser communication link is analyzed quantitatively. The results show that, the receiving power of partially coherent GSM beam is inversely proportional to the beam waist radius, as well as the spatial coherent length and transmission distance. Besides it is proportional to the wavelength. Based on that, when comparing partially coherent GSM beams with coherent Gaussian beams, it turns out that the power loss of the partially GSM coherent light caused by beam expansion is less than coherent Gaussian light. Under the certain condition of initial parameters, the receiving power of partially coherent beam is completely 2.65 times larger than coherent beam.