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研究了基于倏逝波耦合的自组织相干合成激光阵列。应用静态“本征模/超模”理论推导阵列模式;通过数值方法考察阵列激光系统的动态特性进而分析输出功率的稳定性、阵列的扩展能力和阵列模式;并对两种方法得到的阵列模式进行了比较分析。结果表明:输出功率的稳定性以及输出功率的大小受阵列的锁相性能和阵元间的相位差影响;随着激光单元数目的增加,阵列总输出功率会非线性增大。通过跟踪各个阵元的相位变化并考察阵列模式的近场和远场特性,初步验证了37单元阵列的相干合成,随着阵元数目的增加,中心阵元与其邻近层阵元的振幅差会逐渐减小。
The self-organized coherent laser array based on evanescent coupling is studied. The static mode “eigenmode / supermodel ” theory is used to deduce the array mode; the dynamic characteristics of the array laser system are investigated by numerical methods to analyze the stability of the output power, the scalability of the array and the array mode; Array patterns were analyzed comparatively. The results show that the stability of the output power and the output power are affected by the phase-locking performance of the array and the phase difference between the array elements. As the number of laser elements increases, the total array output power increases nonlinearly. By tracking the phase changes of each array element and investigating the near-field and far-field characteristics of the array pattern, the coherence synthesis of 37-element array is preliminarily verified. As the number of elements increases, the amplitude difference between the center element and its neighboring layer elements slowing shrieking.