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Observation of laser pulse propagation in optical fibers with a SPAD camera

Scientific reports, 2017-03, Vol.7 (1), p.43302-43302, Article 43302 [Peer Reviewed Journal]

Copyright Nature Publishing Group Mar 2017 ;Copyright © 2017, The Author(s) 2017 The Author(s) ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/srep43302 ;PMID: 28266554

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  • Title:
    Observation of laser pulse propagation in optical fibers with a SPAD camera
  • Author: Warburton, Ryan ; Aniculaesei, Constantin ; Clerici, Matteo ; Altmann, Yoann ; Gariepy, Genevieve ; McCracken, Richard ; Reid, Derryck ; McLaughlin, Steve ; Petrovich, Marco ; Hayes, John ; Henderson, Robert ; Faccio, Daniele ; Leach, Jonathan
  • Subjects: Cameras ; Computer applications ; Fibers ; Lasers ; Photons ; Scanning ; Spatial discrimination
  • Is Part Of: Scientific reports, 2017-03, Vol.7 (1), p.43302-43302, Article 43302
  • Description: Recording processes and events that occur on sub-nanosecond timescales poses a difficult challenge. Conventional ultrafast imaging techniques often rely on long data collection times, which can be due to limited device sensitivity and/or the requirement of scanning the detection system to form an image. In this work, we use a single-photon avalanche detector array camera with pico-second timing accuracy to detect photons scattered by the cladding in optical fibers. We use this method to film supercontinuum generation and track a GHz pulse train in optical fibers. We also show how the limited spatial resolution of the array can be improved with computational imaging. The single-photon sensitivity of the camera and the absence of scanning the detection system results in short total acquisition times, as low as a few seconds depending on light levels. Our results allow us to calculate the group index of different wavelength bands within the supercontinuum generation process. This technology can be applied to a range of applications, e.g., the characterization of ultrafast processes, time-resolved fluorescence imaging, three-dimensional depth imaging, and tracking hidden objects around a corner.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/srep43302
    PMID: 28266554
  • Source: PubMed Central
    ProQuest Central
    DOAJ Directory of Open Access Journals
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