研究了相干组束中激光器阵列出射光束的占空比,对相干组束后远场中心光斑能量比值的影响,进行了理论分析,并在一维二路自成像相干组束实验中,进行了占空比调节的实验。理论分析认为,在一定单元出射光束宽度下,增大占空比值,可以提高相干组束后中心光斑能量比值,同时可以减少次级光斑的数量。通过实验验证,当光束的腰斑不大于1 mm时,相邻光束间距从2.06 mm增大至6.02 mm,中心光斑能量比从42%降至11.13%。 The duty cycle of the laser beam emitted from the laser array in a coherent beam is studied. The energy ratio of the far field central spot to the coherent beam is studied theoretically. In the one-dimensional two-channel self-imaging coherent beam experiment, Duty cycle adjustment experiment. Theoretical analysis shows that increasing the duty ratio at a certain unit exit beam width can increase the center spot energy ratio of the coherent group beam and reduce the number of secondary spots. Experimental results show that the distance between adjacent beams increases from 2.06 mm to 6.02 mm and the central spot energy ratio decreases from 42% to 11.13% when the waist height of the beam is less than 1 mm.