高功率强激光与物质相互作用蕴藏着丰富的非线性效应，激光聚变驱动器的光束具有高度相干性，它在光束传输过程中极大地凸显了这种效应，并不可避免地制约着激光功率的提升和激光能量的有效利用。回顾激光聚变驱动器的发展史，在提升激光输出能力的主线外，还存在一条与光束相干性做斗争的暗线贯穿其中。以激光与物质相互作用为牵引，从高功率强激光传输中非线性效应抑制和激光等离子体相互作用的抑制两方面回顾了激光聚变驱动器光束相干性的控制现状，并针对潜在需求，展望了未来高功率激光发展的创新技术。

There are many kinds of nonlinear effects in the interaction between high power laser and matter. The beam of laser fusion driver is highly coherent, which greatly enhances the nonlinear effects, and inevitably limits the laser power and efficient utilization. Looking back on the development history of laser fusion driver, there is a dark line runing through the main line of improving laser output capability, which is struggling with beam coherence. The control status of beam coherence in laser fusion driver is reviewed from two aspects: restraining the nonlinear transmission effect of high power laser and suppressing the interaction between laser and plasma. In view of the potential demand, innovative technologies for the future development of high power lasers are proposed.