This paper focuses on the preparation of a new extended set of calibrations of cooling rate (fictive temperature) in fused silica determined by inelastic light scattering and its subsequent use to characterize the local cooling rate distribution in ultra-short pulsed (USP) laser modification. In order to determine the thermal history (e.g. cooling rate and fictive temperature) of fused silica, high-resolution inelastic light-scattering experiments (Raman and Brillouin spectroscopy) were investigated. Calibrations were performed and compared to the existing literature to quantify structural changes due to a change of fictive temperature. Compared to existing calibrations, this paper provides an extension to lower and higher cooling rates. Using this new set of calibrations, we characterized a USP laser modification in fused silica and calculated the local fictive temperature distribution. An equation relating the fictive temperature (T_f ) to cooling rates is given. A maximum cooling rate of 3000 K min⁻¹ in the glass transition region around 1200 C was deduced from the Raman analysis. The Brillouin observations are sensitive to both the thermal history and the residual stress. By comparing the Raman and Brillouin observations, we extracted the local residual stress distribution with high spatial resolution. For the first time, combined Raman and Brillouin inelastic light scattering experiments show the local distribution of cooling rates and residual stresses (detailed behavior of the glass structure) in the interior and the surrounding of an USP laser modified zone.

本文着重于通过非弹性光散射测定熔融石英中冷却速率（假想温度）的一组新的扩展标定的制备，并将其随后用于表征超短脉冲（USP）激光改性中的局部冷却速率分布。为了确定熔融石英的热历史（例如冷却速率和虚拟温度），对高分辨率非弹性光散射实验（拉曼光谱和布里渊光谱法）进行了研究。进行校准并将其与现有文献进行比较，以量化由于虚拟温度变化而引起的结构变化。与现有的校准相比，本文提供了更高和更低冷却速率的扩展。使用这套新的校准，我们在熔融石英中对USP激光改性进行了表征，并计算了局部虚拟温度分布。与假想温度有关的方程式（ 给出了冷却速度的T _f）。由拉曼分析推导出在1200℃附近的玻璃化转变区域中的最大冷却速度为3000K min ^-1。布里渊的观测对热历史和残余应力均敏感。通过比较拉曼和布里渊的观测，我们提取了具有高空间分辨率的局部残余应力分布。拉曼和布里渊的非弹性光散射组合实验首次显示了USP激光改性区内部和周围环境中冷却速率和残余应力（玻璃结构的详细行为）的局部分布。