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基于空间啁啾的单发泵浦-探测技术是探究物质在强激光泵浦下达到温稠密态过程中电子非平衡动力学的重要手段，其时间分辨率已达到百飞秒量级。本文详细阐述了温稠密物质交流电导率的空间啁啾单发测量原理及高时间分辨实验装置，并对影响系统时间分辨率的关键因素进行了深入剖析。分析表明，基于超短泵浦-探测脉冲，该系统可实现13.8 fs的时间分辨率。然而，在实际实验中，延时零点的精确标定、成像系统的景深限制以及低通滤波效应等因素，均会对系统的时间分辨能力产生显著影响。本研究不仅为提升温稠密物质交流电导率单发测量的时间精度提供了理论依据和实践指导，而且为探索强场条件下材料的超快动力学过程奠定了坚实的技术基础。The spatial chirp based single-shot pump-probe technique represents a pivotal technology for studying electron non-equilibrium dynamics in ward dense matter created with intense laser pulses. Notably, its time resolution is capable of reaching tens of femtosecond. In this paper, we introduce the single-shot measurement technique of ac conductivity of warm dense matter, along with a detailed account of the experimental setup. In addition, we conduct an in-depth exploration of the principal factors constraining the system's time resolution. We show the system can achieve a resolution of 13.8 femtoseconds. Nevertheless, during practical application, several aspects, namely the calibration of the zero-delay, the depth of field of the imaging system, and the low-pass filtering effect inherent in the imaging system, will exert a substantial influence on the time-resolution. This research holds great significance as a reference for enhancing the time accuracy in single-shot measurements of ac conductivity of warm dense matter. Moreover, it serves as a potent tool for the in-depth study of the ultrafast dynamic processes of materials under strong-field conditions.
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