Hao Zuo-Qiang, Zhang Jie, Xi Ting-Ting, Yuan Xiao-Hui, Zheng Zhi-Yuan, Lu Xin, Yu Ming-Young, Li Yu-Tong, Wang Zhao-Hua, Zhao Wei, Wei Zhi-Yi
Opt Express. 2007 Nov 26;15(24):16102-9. doi: 10.1364/oe.15.016102.
The robustness and prolongation of multiple filamentation (MF) for femtosecond laser propagation in air are investigated experimentally and numerically. It is shown that the number, pattern, propagation distance, and spatial stability of MF can be controlled by a variable-aperture on-axis pinhole. The random MF pattern can be optimized to a deterministic pattern. In our numerical simulations, we configured double filaments to principlly simulate the experimental MF interactions. It is experimentally and numerically demonstrated that the pinhole can reduce the modulational instability of MF and is favorable for a more stable MF evolution.
对飞秒激光在空气中传播时多次成丝（MF）的稳健性和延长进行了实验和数值研究。结果表明，MF的数量、模式、传播距离和空间稳定性可以通过可变孔径轴上针孔来控制。随机的MF模式可以优化为确定性模式。在我们的数值模拟中，我们配置了双丝以原则上模拟实验中的MF相互作用。实验和数值结果均表明，针孔可以降低MF的调制不稳定性，有利于更稳定的MF演化。
