由于单束激光部分相干性和相位控制系统带宽性能的限制,大功率激光阵列的相干合成一般只能取得部分相干合成的效果。对存在相位控制残差情形下部分相干合成光束在真空中的传输特性进行分析,推导激光阵列在远场光强的解析表达式。对单束激光的相干性以及相位控制残差对合成光束质量的影响进行了定量计算。

Due to the partially coherence property of single laser beam and bandwidth of phase control system,partially combination is often obtained in coherent beam combining of high power lasers. The propagation property in free-space of partially coherent laser array in the case of residual phase error is analyzed,and the analytical expression of far-field intensity distribution is deduced. The influence of coherence of single laser beam and residual phase error on the combined beam quality is studied.