Near perfect focusing through multimode fibres

0557106 - ÚPT 2023 RIV US eng J - Journal Article
Gomes, A. D. - Turtaev, S. - Du, Y. - Čižmár, Tomáš
Near perfect focusing through multimode fibres.
Optics Express. Roč. 30, č. 7 (2022), s. 10645-10663. ISSN 1094-4087
R&D Projects: GA MŠMT EF15_003/0000476
EU Projects: European Commission(XE) 101016787 - DEEPER
Institutional support: RVO:68081731
Keywords : scattering medium * transmission * light
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.8, year: 2022
Method of publishing: Open access
https://opg.optica.org/oe/fulltext.cfm?uri=oe-30-7-10645&id=470425

Holographic, multimode fibre (MMF) based endoscopes envision high-quality in-vivo imaging inside previously inaccessible structures of living organisms, amongst other perspective applications. Within these instruments, a digital micro-mirror device (DMD) is deployed in order to holographically synthesise light fields which, after traversing the multimode fibre, form foci at desired positions behind the distal fibre facet. When applied in various imaging modalities, the purity and sharpness of the achieved foci are determinant for the imaging performance. Here we present diffraction-limited foci, which contain in excess of 96% of optical power delivered by the fibre which, to the best of our knowledge, represents the highest value reported to date. Further, we quantitatively study the impact of various conditions of the experimental procedure including input polarisation settings, influence of ghost diffraction orders, light modulation regimes, bias of the calibration camera and the influence of noise.
Permanent Link: https://hdl.handle.net/11104/0333538