100-Trillion-Frame-per-Second Single-Shot Compressed Ultrafast Photography via Molecular Alignment

Qi, Dalong; Cao, Fengyan; Xu, Shuwu; Yao, Yunhua; He, Yilin; Yao, Jinzhong; Ding, Pengpeng; Jin, Cheng; Deng, Lianzhong; Jia, Tianqing; Liang, Jinyang; Sun, Zhenrong; Zhang, Shian

doi:10.1103/physrevapplied.15.024051

Cited by 8 publications

(10 citation statements)

References 34 publications

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“…Moreover, due to the space-charge effect in electronic imaging, 160 a trade-off needs to be made between the incident light intensity and the signal gain, which limits the imaging quality of the streak tube-based CUP systems. 37 , 151 The efficiency of image-converter streak tubes is also inherently limited by the photon–electron–photon conversion. The quantum yield of the photocathode is moderate for the visible light and decreases dramatically for near-infrared light.…”

Section: Systemmentioning

confidence: 99%

“…Figure 9(e) depicts how the transient alignment of

molecules excited by an ultrashort laser pulse can induce a time-varying refractive-index gradient, resulting in different deflection angles to temporally shear the dynamic scene. 151 Although having not been experimentally demonstrated, this mechanism could open a new avenue of transient-event-assisted ultrafast imaging. The fast responses of properly selected materials could push CUP’s imaging speed to the quadrillion fps level.…”

Section: Systemmentioning

confidence: 99%

“…In the future, transient perturbation in reflective index induced by a temporally modulated ultrashort laser pulse or molecular orientation could bring higher imaging speeds and circumvent image degradation. 151 , 170 …”

Section: Prospectmentioning

confidence: 99%

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Tutorial on compressed ultrafast photography

Lai,

Marquez,

Liang

2024

J. Biomed. Opt.

Self Cite

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. Significance Compressed ultrafast photography (CUP) is currently the world’s fastest single-shot imaging technique. Through the integration of compressed sensing and streak imaging, CUP can capture a transient event in a single camera exposure with imaging speeds from thousands to trillions of frames per second, at micrometer-level spatial resolutions, and in broad sensing spectral ranges. Aim This tutorial aims to provide a comprehensive review of CUP in its fundamental methods, system implementations, biomedical applications, and prospect. Approach A step-by-step guideline to CUP’s forward model and representative image reconstruction algorithms is presented with sample codes and illustrations in Matlab and Python. Then, CUP’s hardware implementation is described with a focus on the representative techniques, advantages, and limitations of the three key components—the spatial encoder, the temporal shearing unit, and the two-dimensional sensor. Furthermore, four representative biomedical applications enabled by CUP are discussed, followed by the prospect of CUP’s technical advancement. Conclusions CUP has emerged as a state-of-the-art ultrafast imaging technology. Its advanced imaging ability and versatility contribute to unprecedented observations and new applications in biomedicine. CUP holds great promise in improving technical specifications and facilitating the investigation of biomedical processes.

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Section: Systemmentioning

confidence: 99%

“…Figure 9(e) depicts how the transient alignment of

Section: Systemmentioning

confidence: 99%

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Tutorial on compressed ultrafast photography

Lai,

Marquez,

Liang

2024

J. Biomed. Opt.

Self Cite

View full text Add to dashboard Cite

show abstract

“…On the one hand, the best performances to date in terms of imaging speed and sequence depth are undoubtedly obtained with passive detection and image reconstruction using advanced algorithms such as compressed sensing. Among those computational imaging methods, compressed ultrafast photography (CUP) 16 and its noteworthy upgradings and variants 11,13,[17][18][19][20] then manage to reach up to 70 trillion Hz frame rates 21 and theoretically up to more than 180 Tfps 22 , few hundreds of femtosecond frame intervals, and potentially sequences with hundreds of frames, in single camera exposure. Albeit being the spearhead of ultrafast imaging techniques and particularly relevant in a laboratory environment, these techniques could suffer from their complex reconstruction scheme hindering the real-time operation and from their low flexibility.…”

Section: Introductionmentioning

confidence: 99%

Acousto-optically driven lensless single-shot ultrafast optical imaging

et al. 2022

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Driven by many applications in a wide span of scientific fields, a myriad of advanced ultrafast imaging techniques have emerged in the last decade, featuring record-high imaging speeds above a trillion-frame-per-second with long sequence depths. Although bringing remarkable insights into various ultrafast phenomena, their application out of a laboratory environment is however limited in most cases, either by the cost, complexity of the operation or by heavy data processing. We then report a versatile single-shot imaging technique combining sequentially timed all-optical mapping photography (STAMP) with acousto-optics programmable dispersive filtering (AOPDF) and digital in-line holography (DIH). On the one hand, a high degree of simplicity is reached through the AOPDF, which enables full control over the acquisition parameters via an electrically driven phase and amplitude spectro-temporal tailoring of the imaging pulses. Here, contrary to most single-shot techniques, the frame rate, exposure time, and frame intensities can be independently adjusted in a wide range of pulse durations and chirp values without resorting to complex shaping stages, making the system remarkably agile and user-friendly. On the other hand, the use of DIH, which does not require any reference beam, allows to achieve an even higher technical simplicity by allowing its lensless operation but also for reconstructing the object on a wide depth of field, contrary to classical techniques that only provide images in a single plane. The imaging speed of the system as well as its flexibility are demonstrated by visualizing ultrashort events on both the picosecond and nanosecond timescales. The virtues and limitations as well as the potential improvements of this on-demand ultrafast imaging method are critically discussed.

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“…On the one hand, the best performances to date in terms of imaging speed and sequence depth are undoubtedly obtained with passive detection and image reconstruction using advanced algorithms such as compressed sensing. Among those computational imaging methods, compressed ultrafast photography (CUP) [16] and its noteworthy upgradings and variants [11,13,17,18,19,20] then manage to reach up to 70 trillion Hz frame rates [21] and theoretically up to more than 180 Tfps [22], few hundreds of femtosecond frame intervals and potentially sequences with hundreds of frames, in a single camera exposure. Albeit being the spearhead of ultrafast imaging techniques and particularly relevant in a laboratory environment, these techniques could suffer from their complex reconstruction scheme hindering real-time operation and from their low flexibility.…”

Section: Introductionmentioning

confidence: 99%

Acousto-optically driven single-shot ultrafast optical imaging

Touil,

Idlahcen,

Becheker

et al. 2021

Preprint

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Driven by many applications in a wide span of scientific fields, a myriad of advanced ultrafast imaging techniques have emerged in the last decade, featuring record-high imaging speeds above a trillion-frame-per-second with long sequence depths. Although bringing remarkable insights in various ultrafast phenomena, their application out of a laboratory environment is however limited in most cases, either by the cost, complexity of operation or by an heavy data processing. We then report a flexible single-shot imaging technique combining sequentially-timed all-optical mapping photography (STAMP) with acousto-optics programmable dispersive filtering. The full control over the acquisition parameters is enabled via the spectro-temporal tailoring of the imaging pulses in an electrically-driven spectral phase and amplitude shaper in which the pulse shaping in both the temporal and spectral domains is controlled through the interaction of the light field with an acoustic wave. Here, contrary to most single-shot techniques, the frame rate, exposure time and frame intensities can be independently adjusted in a wide range of pulse durations and chirp values, making the system remarkably versatile and user-friendly. The imaging speed of the system as well as its flexibility are validated by visualizing ultrashort events on both the picosecond and nanosecond time scales. With the perspective of real-world applications and to achieve the highest technical simplicity, we eventually demonstrate its lensless operation based on digital in-line holography. The virtues and limitations as well as the potential improvements of this on-demand ultrafast imaging method are critically discussed.

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100-Trillion-Frame-per-Second Single-Shot Compressed Ultrafast Photography via Molecular Alignment

Cited by 8 publications

References 34 publications

Tutorial on compressed ultrafast photography

Tutorial on compressed ultrafast photography

Acousto-optically driven lensless single-shot ultrafast optical imaging

Acousto-optically driven single-shot ultrafast optical imaging

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