@article {3470, title = {Memory effect assisted imaging through multimode optical fibres}, journal = {Nature Communications}, volume = {12}, year = {2021}, pages = {3751}, abstract = {

When light propagates through opaque material, the spatial information it holds becomes scrambled, but not necessarily lost. Two classes of techniques have emerged to recover this information: methods relying on optical memory effects, and transmission matrix (TM) approaches. Here we develop a general framework describing the nature of memory effects in structures of arbitrary geometry. We show how this framework, when combined with wavefront shaping driven by feedback from a guide-star, enables estimation of the TM of any such system. This highlights that guide-star assisted imaging is possible regardless of the type of memory effect a scatterer exhibits. We apply this concept to multimode fibres (MMFs) and identify a {\textquoteleft}quasi-radial{\textquoteright} memory effect. This allows the TM of an MMF to be approximated from only one end - an important step for micro-endoscopy. Our work broadens the applications of memory effects to a range of novel imaging and optical communication scenarios.

}, issn = {2041-1723}, doi = {10.1038/s41467-021-23729-1}, url = {https://doi.org/10.1038/s41467-021-23729-1} }
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