Time-stretch LiDAR as a spectrally scanned time-of-flight ranging camera

Jiang, Yunshan; Karpf, Sebastian; Jalali, Bahram

doi:10.1038/s41566-019-0548-6

Cited by 188 publications

(89 citation statements)

References 33 publications

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“…Time bandwidth product in spectro-temporal laser imaging by diffractive excitation (SLIDE). Spectro-temporal encoding with high-information density places rigorous requirements on the spectro-temporal bandwidth of the light source 37 . The wavelength sweep time ΔT is equal to the number of pixels n times the time between pulses Δt i , governed by the informationinterrogation induced latency (here: fluorescent decay time τ i ).…”

Section: Resultsmentioning

confidence: 99%

“…Spectro-temporal stretch via an FDML laser solves this predicament 37 . The FDML laser provides a combination of large spectral span 39 , along with microseconds time span and narrow instantaneous linewidth.…”

Section: Resultsmentioning

confidence: 99%

“…The FDML laser provides a combination of large spectral span 39 , along with microseconds time span and narrow instantaneous linewidth. This type of laser has mainly been used for fast optical coherence tomography (OCT) 28,38,40 , semiconductor compressed pulse generation 41 and non-linear stimulated Raman microscopy 42 and recently inertia-free LiDAR 37 . Its low instantaneous linewidth allows us to achieve a high spatial resolution below 1 µm (see Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, dispersion-based compression could be harnessed to achieve shorter pulses in the singledigit picosecond range 41,46 . To this end, a large time-bandwidth product is required, which however is achievable with FDML lasers 37 .…”

Section: Discussionmentioning

confidence: 99%

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Spectro-temporal encoded multiphoton microscopy and fluorescence lifetime imaging at kilohertz frame-rates

et al. 2020

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Two-Photon Microscopy has become an invaluable tool for biological and medical research, providing high sensitivity, molecular specificity, inherent three-dimensional sub-cellular resolution and deep tissue penetration. In terms of imaging speeds, however, mechanical scanners still limit the acquisition rates to typically 10-100 frames per second. Here we present a high-speed non-linear microscope achieving kilohertz frame rates by employing pulse-modulated, rapidly wavelength-swept lasers and inertia-free beam steering through angular dispersion. In combination with a high bandwidth, single-photon sensitive detector, this enables recording of fluorescent lifetimes at speeds of 88 million pixels per second. We show high resolution, multi-modal-two-photon fluorescence and fluorescence lifetime (FLIM)microscopy and imaging flow cytometry with a digitally reconfigurable laser, imaging system and data acquisition system. These high speeds should enable high-speed and high-throughput image-assisted cell sorting.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Spectro-temporal encoded multiphoton microscopy and fluorescence lifetime imaging at kilohertz frame-rates

et al. 2020

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“…This technique opens up the way for experimental measurement and understanding the behavior of ultrafast non-stationary and rare phenomena in complex nonlinear system. So far, TS-DFT technique has gained intense attentions from optical sensing [205], spectroscopy [206], optical imaging [207], biomedicine [208], and other fields [209]. Using TS-DFT technique, lots of transient dynamics of soliton in the mode-locking fiber laser have been revealed and demonstrated experimentally, including entire buildup dynamics of solitons, soliton molecules, soliton explosion and so on.…”

Section: Operation Principle Of Ts-dft Techniquementioning

confidence: 99%

Dynamics of carbon nanotube-based mode-locking fiber lasers

2020

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AbstractCarbon nanotube (CNT) can work as excellent saturable absorber (SA) due to its advantages of fast recovery, low saturation intensity, polarization insensitivity, deep modulation depth, broad operation bandwidth, outstanding environmental stability, and affordable fabrication. Its successful application as SA has promoted the development of scientific research and practical application of mode-locked fiber lasers. Besides, mode-locked fiber laser constitutes an ideal platform for investigating soliton dynamics which exhibit profound nonlinear optical dynamics and excitation ubiquitous in many fields. Up to now, a variety of soliton dynamics have been observed. Among these researches, CNT-SA is a key component that suppresses the environmental perturbation and optimizes the laser system to reveal the true highly stochastic and non-repetitive unstable phenomena of the initial self-starting lasing process. This review is intended to provide an up-to-date introduction to the development of CNT-SA based ultrafast fiber lasers, with emphasis on recent progress in real-time buildup dynamics of solitons in CNT-SA mode-locked fiber lasers. It is anticipated that study of dynamics of solitons can not only further reveal the physical nature of solitons, but also optimize the performance of ultrafast fiber lasers and eventually expand their applications in different fields.

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Pyroelectric‐Accelerated Perovskite Photodetector for Picosecond Light Detection and Ranging

Min,

Sun,

Guo

et al. 2024

Advanced Materials

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Light detection and ranging (LiDAR) is indispensable in applications such as unmanned aerial vehicles, autonomous driving, and biomimetic robots. However, the precision and available distance of LiDAR are constrained by the speed and sensitivity of the photodetector, necessitating the use of expensive and energy‐consuming avalanche diodes. To address these challenges, in this study, a pyroelectricity‐based acceleration strategy with two‐dimensional (2D)‐(graded 3D) perovskite heterojunction is proposed to achieve record high speed (27.7 ns with active area of 9 mm2, and 176 ps with active area of 0.2 mm2) and high responsivity (0.65 A W−1) at zero bias. This success is attributed to the unique mechanism where the electrons from the pyroelectric effect at the Cl‐rich 2D/3D interface directly recombine with excess holes during light‐dark transitions, breaking speed limitations related to carrier mobility and capacitive effect. Furthermore, the introduced pyroelectric effect significantly enhances the photoresponse, resulting in a self‐powered external quantum efficiency exceeding 100%. The study also demonstrates precise position detection at the centimeter level. In conclusion, this research presents a pioneering approach for developing high‐speed photodiodes with exceptional sensitivity, mitigating energy and cost concerns in LiDAR applications.This article is protected by copyright. All rights reserved

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Time-stretch LiDAR as a spectrally scanned time-of-flight ranging camera

Cited by 188 publications

References 33 publications

Spectro-temporal encoded multiphoton microscopy and fluorescence lifetime imaging at kilohertz frame-rates

Spectro-temporal encoded multiphoton microscopy and fluorescence lifetime imaging at kilohertz frame-rates

Dynamics of carbon nanotube-based mode-locking fiber lasers

Pyroelectric‐Accelerated Perovskite Photodetector for Picosecond Light Detection and Ranging

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