Multimode fiber transmission matrix obtained with internal references

0509405 - ÚPT 2020 RIV US eng C - Conference Paper (international conference)
Jákl, Petr - Šiler, Martin - Ježek, Jan - Traegaardh, Johanna - Zemánek, Pavel - Čižmár, Tomáš
Multimode fiber transmission matrix obtained with internal references.
Adaptive Optics and Wavefront Control for Biological Systems V. Proceedings of SPIE. Vol. 10886. Bellingham: SPIE, 2019, č. článku 1088610. ISBN 978-1-5106-2414-6. ISSN 0277-786X.
[Conference on Adaptive Optics and Wavefront Control for Biological Systems /5./. San Francisco (US), 03.02.2019-04.02.2019]
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 * endoscopy * transmission matrix * spatial light modulator
OECD category: Optics (including laser optics and quantum optics)

Multimode fiber imaging using transmission matrix (TM) is a promising way of deep inspection of living objects. These techniques, however, face a problem of obtaining the transmission matrix using phase -shifting interferometry with external reference beam, which requires additional instrumentation and increases space requirements of the experiment. We suggest a method employing input mode represented by a focal spot at the proximal end of the fiber as an internal reference wave. Due to speckle nature of the output, it is necessary to cover blind spots in the transmission matrix arising from the lack of interference signal by several measurements with different input modes used as a reference. The effect of optimized selection of internal references will be analyzed and compared with the external reference approach.
Permanent Link: http://hdl.handle.net/11104/0300163