Memory effect assisted imaging through multimode optical fibres

0543420 - ÚPT 2022 RIV GB eng J - Journal Article
Li, S. - Horsley, S. A. R. - Tyc, Tomáš - Čižmár, Tomáš - Phillips, D. B.
Memory effect assisted imaging through multimode optical fibres.
Nature Communications. Roč. 12, č. 1 (2021), č. článku 3751. E-ISSN 2041-1723
R&D Projects: GA MŠMT EF15_003/0000476
Institutional support: RVO:68081731
Keywords : multimode optical fibre * wavefront shaping * holography * transmission matrix
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 17.694, year: 2021
Method of publishing: Open access
https://www.nature.com/articles/s41467-021-23729-1

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 ‘quasi-radial’ 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.
Permanent Link: http://hdl.handle.net/11104/0321098


Research data: University of Exeter Repository