Single-Shot Reconfigurable Femtosecond Imaging of Ultrafast Optical Dynamics.
Single-Shot Reconfigurable Femtosecond Imaging of Ultrafast Optical Dynamics.
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DOI：
10.1002/advs.202207222
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发表时间：
2023-05
期刊：
影响因子：
15.1
通讯作者：
Wang, Lihong V.
中科院分区：
文献类型：
--
作者：
Wang, Peng;Wang, Lihong V.
了解飞秒时间尺度下的超快动力学在基础研究和技术创新中起着关键作用。在真实的时间中对这些事件进行时空观测需要大于每秒1012帧（fps）的成像速度，这远远超出了普遍存在的半导体传感器技术的基本速度限制。此外，大多数飞秒事件是不可重复或难以重复的，因为它们要么在高度不稳定的非线性状态下工作，要么需要极端或罕见的条件才能启动。因此，传统的泵浦-探测成像方法失败了，因为它严重依赖于精确的事件重复。单次超快成像成为唯一的解决方案;然而，现有技术无法达到15×1012 fps以上，并且只能记录不足的帧数。压缩超快光谱摄影（CUSP）的建议，以克服这些限制。在这里，CUSP的全部设计空间是通过操纵主动照明中的超短光脉冲来探索的。通过参数优化，实现了219×1012 fps的超高帧率。CUSP的这种实现也非常灵活，允许成像速度和帧数（几百到1000）的各种组合，可以很容易地部署在各种科学研究中，例如激光诱导的瞬态双折射，自聚焦和电介质中的细丝。压缩超快光谱摄影（CUSP）通过参数优化达到了每秒219万亿帧的新单次拍摄成像速度记录。CUSP可以很容易地重新配置为不同的成像速度和帧数的组合。CUSP是实现真实的-时间观察和瞬态双折射，自聚焦，细丝在双折射，时空啁啾复杂的光脉冲的定量表征。
Understanding ultrafast dynamics in the femtosecond timescale plays a pivotal role in fundamental research and technology innovation. Spatiotemporal observation of those events in real‐time requires imaging speeds greater than 1012 frames per second (fps), far beyond the fundamental speed limits of the ubiquitous semiconductor sensor technologies. In addition, a majority of femtosecond events are non‐repeatable or difficult‐to‐repeat since they either work in a highly unstable nonlinear regime or require extreme or rare conditions to initiate. Therefore, the traditional pump‐probe imaging approach fails since it heavily depends on precise event repetition. Single‐shot ultrafast imaging emerges as the only solution; however, existing techniques cannot reach more than 15×1012 fps, and they only record an insufficient number of frames. Compressed ultrafast spectral photography (CUSP) is proposed to overcome these limitations. Here, CUSP's full design space is explored by manipulating the ultrashort optical pulse in the active illumination. Via parameter optimization, an extraordinarily fast frame rate of 219×1012 fps is achieved. This implementation of CUSP is also highly flexible, allowing various combinations of imaging speeds and numbers of frames (several hundred up to 1000) to be readily deployed in diverse scientific studies, such as laser‐induced transient birefringence, self‐focusing, and filaments in dielectric media. Compressed ultrafast spectral photography (CUSP) reaches a new single‐shot imaging speed record of 219 trillion frames per second by parameter optimization. CUSP can be readily reconfigured for different combinations of imaging speeds and numbers of frames. CUSP is implemented for real‐time observation and quantitative characterization of transient birefringence, self‐focusing, filaments in dielectrics, and spatiotemporally chirped complex optical pulses.
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DOI：
10.1038/lsa.2017.45
发表时间：
2017-09
期刊：
Light, science & applications
影响因子：
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作者：
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通讯作者：
Kristensson E
影响因子：
35
作者：
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发表时间：
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期刊：
Sensors (Basel, Switzerland)
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作者：
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通讯作者：
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DOI：
10.1109/jstqe.2011.2147281
发表时间：
2012-01-01
影响因子：
4.9
作者：
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通讯作者：
Kubota, Toshihiro
影响因子：
2.5
作者：
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