Wang Xiaohua, Zheng Yi, Shen Feng, Rao Changhui
The Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China.
J Opt Soc Am A Opt Image Sci Vis. 2012 May 1;29(5):702-10. doi: 10.1364/JOSAA.29.000702.
Theoretical analysis for the far-field diffraction of the coherent laser array (CLA) is presented. Based on the theoretical model of the propagation of CLA, the conditions and restrictions for coherent beam combination, two-dimensional steering, and dark-hollow beam generation are theoretically described in detail. With properly organized phase distributions and tilt control, the peak location of the far-field pattern of the CLA could shift two-dimensionally in a large scale of steering angle. With additional amplitude modulation, the far-field pattern could have special shapes. The simulated results agree with the theoretical analysis. It is a feasible way to realize all these applications by a CLA with well-arranged phase distributions and/or additional amplitude modulation.
本文给出了相干激光阵列（CLA）远场衍射的理论分析。基于CLA传播的理论模型，从理论上详细描述了相干光束合成、二维光束转向以及暗空心光束产生的条件和限制。通过合理组织相位分布和倾斜控制，CLA远场图样的峰值位置能够在大角度范围内进行二维移动。通过附加幅度调制，远场图样可具有特殊形状。模拟结果与理论分析一致。对于具有合理相位分布和/或附加幅度调制的CLA而言，实现所有这些应用是一种可行的方法。
