Imaging via multimode optical fiber: recovery of a transmission matrix using internal references

0494378 - ÚPT 2019 RIV CZ eng C - Conference Paper (international conference)
Šiler, Martin - Jákl, Petr - Traegaardh, Johanna - Ježek, Jan - Uhlířová, Hana - Tučková, Tereza - Zemánek, Pavel - Čižmár, Tomáš
Imaging via multimode optical fiber: recovery of a transmission matrix using internal references.
Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Proceedings of the 16th International Seminar. Brno: Institute of Scientific Instruments The Czech Academy of Sciences, 2018, s. 82-83. ISBN 978-80-87441-23-7.
[Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Skalský dvůr (CZ), 04.06.2018-08.06.2018]
R&D Projects: GA MŠMT EF15_003/0000476; GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : multimode optical fiber
OECD category: Optics (including laser optics and quantum optics)

Current research of life shows a great desire to study the mechanics of biological processes
directly within the complexity of living organisms. However, majority of practical techniques
used nowadays for tissue visualization can only reach depths of a few tens of micrometres as
the issue obscures deep imaging due to the random light scattering. Several imaging
techniques deal with this problems from different angels, such as optical coherence
tomography, light sheet microscopy or structured light illumination A different and promising strategy to overcome the turbid nature of scattering tissues is to employ multimode optical fibers (MMF) as minimally invasive light guides or endoscopes to provide optical access inside. Although the theoretical description of light propagation through such fibers has been developed a long time ago it is frequently considered inadequate to describe real MMF. The inherent randomization of light propagating through MMFs is typically attributed to undetectable deviations from the ideal fiber structure. It is a commonly believed that this
additional chaos is unpredictable and that its influence grows with the length of the fiber.
Despite this, light transport through MMFs remains deterministic and can be characterized by a transmission matrix (TM) which connects the intensity and phase patterns on the fiber input and output facets. Once the TM is known it can be used to create focus in any desired 3D
coordinates beyond the distal fiber facet, see figure 1, and perform e.g. fluorescence based
laser scanning microscopy or optical trapping.
Permanent Link: http://hdl.handle.net/11104/0287639