光纤放大器阵列的远场特性研究

Study of far field distribution of fiber amplifier arrays

从光纤激光器阵列相干合成远场光强分布的解析表达式出发,详细研究了阵列占空比、阵元个数以及阵元的相位误差对相干合成远场图样分布、中心主瓣的角宽度及所占能量的影响.给出了占空比为12.5%时,三路保偏光纤放大器相干合成的实验结果.

In this paper, according to the analytical equation of the far-field intensity distribution in coherent combination of fiber laser arrays, we investigate the influence of fill factor of the laser arrays, elements and phase errors on the far-field patterns, the energy and angular width of the main lobe. At last, we describe the experimental study of the coherent combining of three-element fiber-laser arrays based on ytterbium polarization-maintaining single-mode power amplifiers with the fill factor of 12.5 %.