The long-term hydrodynamics of laser generated plasma regions are dictated by the spatial distribution of the deposited laser energy. Using an integrated chemical-optical solver to track energy deposition from single and dual nanosecond laser pulses, we show that self-defocusing results in a biased growth of the plasma region towards the focusing lens. This displacement of energy deposition scales with the Rayleigh range and can be reduced by maximizing the beam divergence.

中文翻译：

---

通过自散焦在纳秒激光等离子体形成过程中能量沉积的位移

激光产生的等离子体区域的长期流体动力学取决于沉积的激光能量的空间分布。使用集成的化学光学求解器跟踪单纳秒和双纳秒激光脉冲的能量沉积，我们显示自散焦导致等离子体区域向聚焦透镜的偏向生长。能量沉积的这种位移与瑞利范围成比例，并且可以通过使光束发散最大化来减小。