Künzel S, Williams G O, Boutu W, Galtier E, Barbrel B, Lee H J, Nagler B, Zastrau U, Dovillaire G, Lee R W, Merdji H, Zeitoun Ph, Fajardo M
Appl Opt. 2015 May 20;54(15):4745-9. doi: 10.1364/AO.54.004745.
We report on the shot-to-shot stability of intensity and spatial phase of high-harmonic generation (HHG). The intensity stability is measured for each high-harmonic (HH) order with a spectrometer. Additionally, the spatial phase is measured with an XUV wavefront sensor for a single HH order measured in a single shot, which according to our knowledge was not reported before with a Hartmann wavefront sensor. Furthermore, we compare the single-shot measurement of the spatial phase with time-integrated measurements and we show that the XUV wavefront sensor is a useful tool to simultaneously optimize the spatial phase and intensity of HHG within the available HHG parameter range used in this study.
我们报告了高次谐波产生（HHG）中强度和空间相位的逐次稳定性。利用光谱仪测量了每个高次谐波（HH）阶次的强度稳定性。此外，使用极紫外（XUV）波前传感器单次测量了单个HH阶次的空间相位，据我们所知，此前尚未有使用哈特曼波前传感器进行此类测量的报道。此外，我们将空间相位的单次测量与时间积分测量进行了比较，结果表明，在本研究使用的可用HHG参数范围内，XUV波前传感器是同时优化HHG空间相位和强度的有用工具。
