The 9th International Conference on Matter and Radiation at Extremes (ICMRE2026) ( ICMRE2026)

Ultrashort pulsed lasers are widely used in scientific researches and applications due to their extremely short pulse duration and ultrahigh peak power. Full spatiotemporal field measurement of the ultrashort pulses is crucial for accurately understanding the spatiotemporal properties of the laser pulses and optimizing the laser output performance. Existing measurement techniques face the challenge of spatiotemporal single-shot measurements, and it is difficult to realize self-referencing with high-resolution measurements. To address above issues, we combined the advantages of spatio-spectral multiplexing and computational imaging to propose a self-referenced single-shot spatiotemporal measurement technique, and experimentally captured the multi-dimensional amplitude and phase information of an ultrashort pulse within a single frame, achieving femtosecond-scale temporal resolution, micron-scale spatial resolution, and 0.04 rad phase accuracy. Furthermore, a single-shot self-referenced spatiotemporal light field measurement method is proposed based on spatially multiplexed quadriwave lateral shearing interferometer wavefront sensing, and spatiotemporal optical vortex (STOV) light pulses were reconstructed experimentally. Finally, we combined the quadriwave lateral shearing interferometry and compressed sensing to propose a single-shot measurement technique for the spatiotemporal full-domain characterization of ultrashort pulses. This method offers the advantages of single-shot measurement, a wide spectral range, multiple spectral channels, and high phase accuracy. These methods exhibited strong applicability, a large dynamic range, and robust anti-interference capabilities, enabling accurate recovery of complex ultrashort pulse lasers, and they hold great potential for improving ultrashort pulse laser performance and advancing complex ultrafast laser interaction phenomena in a wide range of scientific and industrial applications.

高功率激光,超快测量,时空特性