激光射孔是油井完井工程领域一项具有前瞻性的技术，对提高石油资源采收率具有重要的应用价值。为提高油井激光射孔所使用的激光功率和激光传输的安全性，利用19台光纤传输972 nm半导体激光器实现了10 kW级激光空间非相干合束。通过分析参与合束的准直激光束的半径、间距与合束激光的光斑重叠率之间的变化规律以及模拟合束激光横截面能量分布，完成激光空间非相干合束器的结构设计。在300 mm的合束长度内实现了具有单一光束形态且最大合束功率达到10.441 kW、焦斑直径21 mm、线宽2.46 nm的空间非相干合束激光输出，合束效率达到98.2%。利用10 kW空间非相干合束激光完成了针对砂岩和钢板的地面激光射孔实验，射孔深度分别达到570 mm和70 mm。

Laser perforation is a forward-looking technology in the oil well completion engineering, which has great application value for improving oil recovery. In order to improve the laser power and laser transmission safety used in oil well laser perforation, 10 kW-laser space incoherent combining was realized by using 19 fiber-transmitted 972 nm semiconductor lasers. By studying the effect of the radii, separation distances of collimated laser beams on the spot overlapping efficiency of combined laser beam, and simulating cross section energy distribution of combined laser beam, the structure design of a 19×1 space incoherent beam combiner was completed. A space incoherent combined laser beam with a single beam shape was achieved within the beam combining length of 300 mm, with a maximum combined power of 10.441 kW, a focal spot diameter of 21 mm, a line width of 2.46 nm and a combined efficiency of 98.2%. Ground laser perforation experiments for sandstone and steel plate were performed using the 10 kW spatial incoherent beam laser with perforation depths of 570 mm and 70 mm, respectively.