论文部分内容阅读
对多路光纤激光输出光束进行合成是获得高功率、高光束质景的输出的有效方法。为了比较不同合成方案的远场效果,对聚焦发射的相干合成和非相干合成光束远场分布进行数值计算,从控制相位误差、光束抖动和阵列占空比等三方面对这两种方案的远场特性进行比较研究。计算结果表明,与非相十合成相比,相干合成能够在远场获得更高的能量集中度,但会受到光束抖动和阵列占空比的严重影响。和通常考虑的平行发射相比,聚焦发射体制对相干合成时相位误差的要求宽松了很多,相位误差均方根(RMS)为π/3时,半径为5.6 cm的圆桶内汇聚的能量仍大于完全相干合成情形下的90%。
Combining multiple fiber laser output beams is an effective way to achieve high-power, high-beam texture output. In order to compare the far-field effects of different synthetic schemes, the far field distributions of coherent and non-coherent synthesized beams are numerically calculated, and the two schemes are far from the control of phase error, beam jitter and array duty cycle Field characteristics of comparative study. The calculated results show that coherent synthesis can obtain higher energy concentration in the far field than the non-phase-10 synthesis, but will be seriously affected by the beam jitter and the array duty cycle. Compared with the commonly considered parallel emission, the focus launch system has a much looser requirement on the phase error in coherent synthesis, and the energy converged in a barrel with a radius of 5.6 cm at a RMS of π / 3 of the phase error Greater than 90% in the case of completely coherent synthesis.