Feigenbaum E, Laurence T A
Appl Opt. 2017 May 1;56(13):3666-3672. doi: 10.1364/AO.56.003666.
We measure filament damage due to self-focusing in fused silica glass using short laser pulses of 1-50 ps of 1053 nm wavelength. We examine the dependence of the effect on the excitation fluence and pulse length. A beam propagation model adjusted to picosecond pulse lengths shows a good fit to the measurements. Whereas for longer pulses a filament appears within the bulk, for the shorter pulses surface damage appears due to the high nonlinearity of the system.
我们使用波长为1053nm、脉宽为1 - 50皮秒的短激光脉冲来测量熔融石英玻璃中因自聚焦导致的细丝损伤。我们研究了该效应与激发通量和脉冲长度的相关性。一个针对皮秒脉冲长度进行调整的光束传播模型与测量结果吻合良好。对于较长脉冲，细丝出现在材料内部，而对于较短脉冲，由于系统的高非线性，表面损伤出现了。
