光学参数对激光阵列相干

利用傅里叶光学方法,获得了相干合束远场光强的解析表达式,讨论了相位、振幅和发光单元数目等光学参数对远场光束质量的影响。研究结果表明:随着参与合束的发光单元数目的增加,尖峰变锐;同相模的光能集中在更小的立体角内,使得相干合束的亮度增加;异相模的光束能量较为分散,其峰值光强有所降低;随着振幅比β的减少,相干合束远场光强的峰值相对变化率增加,远场光强分布出现了本底现象,远场干涉条纹对比度降低。

Effects of optical paramerters on the coherent combination of laser array in the far field

Using the expression of the far-field of coherent combination beams deduced by Fourier method,the influnce of beam qulity with phase or swing and emitter in the far-field is discussed.Results show that the peak becoms sharp with the increases of combination beams numbers;the luminous energy of phase mode is centralized in the smallest three-dimensional angle,and the illumination of coherent combination beams is increased;the luminous energy of out phase mode becomes disperser,the peak strength is reduced;wi...