Endoscopic Imaging Using a Multimode Optical Fibre Calibrated with Multiple Internal References

0552078 - ÚPT 2023 RIV CH eng J - Journal Article
Jákl, Petr - Šiler, Martin - Ježek, Jan - Cifuentes, Angel S. - Traegaardh, Johanna - Zemánek, Pavel - Čižmár, Tomáš
Endoscopic Imaging Using a Multimode Optical Fibre Calibrated with Multiple Internal References.
Photonics. Roč. 9, č. 1 (2022), č. článku 37. E-ISSN 2304-6732
R&D Projects: GA MŠMT EF15_003/0000476; GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : fibre endoscopy * spatial light modulator * transmission matrix
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.4, year: 2022
Method of publishing: Open access
https://www.mdpi.com/2304-6732/9/1/37

The interferometric acquisition of the transmission matrix (TM) of a multimode optical fibre (MMF), which is at the heart of multimode fibre-based endoscopic imaging methods, requires using a reference beam. Attempts to use an internal reference, that is to provide the reference in a common pathway geometry through the MMF itself, lead to a speckled reference intensity and consequential occurrence of “blind spots” - locations where insufficient optical power in the reference wave inflicts strong measurement errors. Here we show that combining a relatively small number of TMs, which are measured using different internal references, facilitates a complete elimination of blind spots, and thereby a significant enhancement of the imaging quality.
Permanent Link: http://hdl.handle.net/11104/0327230