Single-shot ultrafast tomographic imaging by spectral multiplexing

N.H. Matlis (), A. Axley and W.P. Leemans
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N.H. Matlis: Lawrence Berkeley National Laboratory
A. Axley: Lawrence Berkeley National Laboratory
W.P. Leemans: Lawrence Berkeley National Laboratory

Nature Communications, 2012, vol. 3, issue 1, 1-8

Abstract: Abstract Computed tomography has profoundly impacted science, medicine and technology by using projection measurements scanned over multiple angles to permit cross-sectional imaging of an object. The application of computed tomography to moving or dynamically varying objects, however, has been limited by the temporal resolution of the technique, which is set by the time required to complete the scan. For objects that vary on ultrafast timescales, traditional scanning methods are not an option. Here we present a non-scanning method capable of resolving structure on femtosecond timescales by using spectral multiplexing of a single laser beam to perform tomographic imaging over a continuous range of angles simultaneously. We use this technique to demonstrate the first single-shot ultrafast computed tomography reconstructions and obtain previously inaccessible structure and position information for laser-induced plasma filaments. This development enables real-time tomographic imaging for ultrafast science, and offers a potential solution to the challenging problem of imaging through scattering surfaces.

Date: 2012
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DOI: 10.1038/ncomms2120

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