Rapid broadband characterization of scattering medium using hyperspectral imaging
Abstract
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.
Citation
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
Publication
Optica
Status
Peer reviewed
ISSN
2334-2536Type
Journal article
Description
Funding: 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).Collections
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