论文标题
短激光脉冲的多泵拉曼扩增中的聚焦性
Focusability in the multi-pump Raman amplification of short laser pulses
论文作者
论文摘要
在空间上结合多个强激光束是实现超高激光强度的有前途的概念。原则上的实验证明是在国家点火设施进行的，以报告高达20个具有高能量转化效率的脉冲的组合。但是，组合过程可能会损害由于种子和泵波前的不匹配而导致的种子对焦性。在这里，我们研究了有限泵梁大小对种子脉冲的聚焦性的影响。我们提出了一种通过专门排列多个泵梁的方法来保留甚至改善种子对焦性的方法。结果通过耦合非线性schrödinger方程的数值解证明了结果。
Spatially combining multiple strong laser beams is a promising concept for achieving ultrahigh laser intensities. Proof-of-principle experiments have been conducted at the National Ignition Facility to report a combination of up to twenty pulses with high energy conversion efficiency. However, the combination process might damage the seed focusability due to mismatch of the seed and pump wavefronts. Here, we investigate the effect of the finite pump beam size on the focusability of the seed pulse. We propose an approach to retain and even improve the seed focusability by specifically arranging multiple pump beams. The results are demonstrated by numerical solution of coupled nonlinear Schrödinger equations.
