连续波强激光传输的研究

进行了千瓦级连续波ＣＯ２强激光传输的实验研究，传输距离分别为５０ｍ，８０ｍ和１００ｍ，接收到的远场花样中衍射次极大出现了不连续分布。通过远场强度分布的数值模拟对实验结果进行了定性的解释。研究结果为进一步深入研究提供了有益的资料。

Propagation of High-Power CW Laser Beam in Air

Outdoor far field propagation experiments have been made with a mono-mode laser beamof an annular cross-section output from a HGL-90 10kW transverse flowing CW CO2 laserdevice having an unstable resonator,The high-power laser beam was received with a piece ofhard-board each at a distance of 50, 80,and l00 meters, respectively when the laser beampower was l. 5 kW. The far field distribution patterns of the diffraction intensity have beenobtainedwith the marks burned on the board by the laser beam,The patterns obtained aredifferent from those of ideaI Fraunhofer diffraction ones as in the former case,in which thesub-maximum intensity is distributed discontinuously and is of the same order of magnitudeof the central maximum,For a high-power laser beam with non-homogeneous near field pat-tern, the intensity distribution of FFP was simulated numerically and compared with the ex-perimental results. Some qualitative explanations are given.