研究了基于光纤放大网络的激光惯性约束核聚变靶面光场的均匀特性,采用透镜阵列 匀滑多束多模光纤激光器集束后的光场,设计了合适的透镜阵列并进行相应的实验,获得聚焦后 靶面处的极小光斑,其靶面光场顶部区域均方根(RMS)低于5%。同时实验上研究了靶面 位置和集束激光器数目对匀滑效果的影响,合适的靶面位置和增加集束激光器数目能明显改善匀滑效果。

The smoothness of the optical field on target surface in the laser inertial confinement fusion was studied based on fiber amplification network. The lens array was used to smooth the optical field generated by multi-beam multi-mode fiber laser after beam combining. The corresponding experiment was carried out with proper lens array. As a result, a small focused light spot was obtained on the target surface, with RMS less than 5% on the top region of the optical field. The influence of the target surface position and number of beam combining lasers on the smoothness of final optical field was also studied in the experiment. Proper target surface position and the increased number of beam combining lasers obviously improved the smoothness.