Single-shot ultrafast multidimensional optical imaging(UMOI)combines ultrahigh temporal resolution with multidimensional imaging capabilities in a snapshot,making it an essential tool for real-time detection and analy...Single-shot ultrafast multidimensional optical imaging(UMOI)combines ultrahigh temporal resolution with multidimensional imaging capabilities in a snapshot,making it an essential tool for real-time detection and analysis of ultrafast scenes.However,current single-shot UMOI techniques cannot simultaneously capture the spatial-temporal-spectral complex amplitude information,hampering it from complete analyses of ultrafast scenes.To address this issue,we propose a single-shot spatial-temporal-spectral complex amplitude imaging(STS-CAI)technique using wavelength and time multiplexing.By employing precise modulation of a broadband pulse via an encoding plate in coherent diffraction imaging and spatial-temporal shearing through a wide-open-slit streak camera,dual-mode multiplexing image reconstruction of wavelength and time is achieved,which significantly enhances the efficiency of information acquisition.Experimentally,a custom-built STS-CAI apparatus precisely measures the spatiotemporal characteristics of picosecond spatiotemporally chirped and spatial vortex pulses,respectively.STS-CAI demonstrates both ultrahigh temporal resolution and robust phase sensitivity.Prospectively,this technique is valuable for spatiotemporal coupling measurements of large-aperture ultrashort pulses and offers promising applications in both fundamental research and applied sciences.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.12074121,12274139,and 12325408)the China Postdoctoral Science Foundation(Grant Nos.2023M743252 and 2024T170846)+1 种基金the Fundamental Research Funds for the Central Universities(Grant No.YZY24014)the Key Research and Development Program of Zhejiang Province(Grant No.2024SSYS0014).
文摘Single-shot ultrafast multidimensional optical imaging(UMOI)combines ultrahigh temporal resolution with multidimensional imaging capabilities in a snapshot,making it an essential tool for real-time detection and analysis of ultrafast scenes.However,current single-shot UMOI techniques cannot simultaneously capture the spatial-temporal-spectral complex amplitude information,hampering it from complete analyses of ultrafast scenes.To address this issue,we propose a single-shot spatial-temporal-spectral complex amplitude imaging(STS-CAI)technique using wavelength and time multiplexing.By employing precise modulation of a broadband pulse via an encoding plate in coherent diffraction imaging and spatial-temporal shearing through a wide-open-slit streak camera,dual-mode multiplexing image reconstruction of wavelength and time is achieved,which significantly enhances the efficiency of information acquisition.Experimentally,a custom-built STS-CAI apparatus precisely measures the spatiotemporal characteristics of picosecond spatiotemporally chirped and spatial vortex pulses,respectively.STS-CAI demonstrates both ultrahigh temporal resolution and robust phase sensitivity.Prospectively,this technique is valuable for spatiotemporal coupling measurements of large-aperture ultrashort pulses and offers promising applications in both fundamental research and applied sciences.
