Warburton, R. et al. (2017) Observation of laser pulse propagation in optical fibers with a SPAD camera. Scientific Reports, 7, 43302. (doi: 10.1038/srep43302) (PMID:28266554) (PMCID:PMC5339868)
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Abstract
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.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Clerici, Professor Matteo and Faccio, Professor Daniele |
| Authors: | Warburton, R., Aniculaesei, C., Clerici, M., Altmann, Y., Gariepy, G., McCracken, R., Reid, D., McLaughlin, S., Petrovich, M., Hayes, J., Henderson, R., Faccio, D., and Leach, J. |
| College/School: | College of Science and Engineering > School of Engineering College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Scientific Reports |
| Publisher: | Nature Publishing Group |
| ISSN: | 2045-2322 |
| ISSN (Online): | 2045-2322 |
| Published Online: | 07 March 2017 |
| Copyright Holders: | Copyright © 2017 The Authors |
| First Published: | First published in Scientific Reports 7:43302 |
| Publisher Policy: | Reproduced under a creative commons license |
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