论文部分内容阅读
针对内通道传输过程中激光束相位特性的变化,建立了内通道中光场-流场的耦合仿真模型,通过引入湍流相位屏模拟了内通道中湍流扰动对传输光束波前相位的影响。在此基础上,定量计算了不同轴向风速条件下内通道传输光束的波前相位特性,并结合自适应波前校正模型,分析了激光束经内通道传输后的波前校正效果。研究结果表明,随着轴向风速的增大,激光束波前相位中的高频成分呈现出先增大后减小的趋势,经自适应波前校正后的光束质量也呈现出类似趋势,且当轴向风速约为0.65 m/s时畸变波前中的高频成分最多,经波前校正后的光束质量最差。该模型能够为激光控制系统的设计和性能评估提供一定参考。
Aiming at the change of phase characteristics of laser beam in the inner channel, a coupling simulation model of the optical field and the flow field in the inner channel was established. The turbulent phase screen was used to simulate the influence of the turbulent disturbance in the inner channel on the phase of the transmitted beam. On this basis, the wave front phase characteristics of the inner channel transmission beam under different axial wind speeds are quantitatively calculated, and the wavefront correction effect after the laser beam is transmitted through the inner channel is analyzed in combination with the adaptive wavefront correction model. The results show that with the increase of axial wind speed, the high-frequency components in the wavefront of the laser beam first increase and then decrease, and the beam quality after the adaptive wavefront correction also shows a similar trend When the axial wind speed is about 0.65 m / s, the high frequency component of the distortion wavefront is the most, and the beam quality after the wavefront correction is the worst. The model can provide some reference for the design and performance evaluation of laser control system.