Rapid broadband characterization of scattering medium using hyperspectral imaging
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Scattering of a coherent ultrashort pulse of light by a disordered medium results in a complex spatiotemporal speckle pattern. The form of the pattern can be described by knowledge of a spectrally dependent transmission matrix, which can in turn be used to shape the propagation of the pulse through the medium. We introduce a method for rapid measurement of this matrix for the entire spectrum of the pulse based on a hyperspectral imaging system that is close to 2 orders of magnitude faster than any approach previously reported. We demonstrate narrowband as well as spatiotemporal refocusing of a femtosecond pulse temporally stretched to several picoseconds after propagation through a multiply scattering medium. This enables new routes for multiphoton imaging and manipulation through complex media.
Boniface , A , Gusachenko , I , Dholakia , K & Gigan , S 2019 , ' Rapid broadband characterization of scattering medium using hyperspectral imaging ' Optica , vol. 6 , no. 3 , pp. 274-279 . https://doi.org/10.1364/OPTICA.6.000274
Copyright 2019 the Author(s). Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
DescriptionFunding: UK EPSRC grant (EP/R004854/1) (IG, KD). IG acknowledges support of SUPA Postdoctoral and Early Career Researcher Short-Term Visits funding (SFC H17014); H2020 European Research Council (ERC) (SMARTIES–724473).
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