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- Title
Endoscopic Imaging Using a Multimode Optical Fibre Calibrated with Multiple Internal References.
- Authors
Jákl, Petr; Šiler, Martin; Ježek, Jan; Cifuentes, Ángel; Trägårdh, Johanna; Zemánek, Pavel; Čižmár, Tomáš
- Abstract
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.
- Subjects
FIBERS; MEASUREMENT errors; IMAGE intensifiers; SPATIAL light modulators; OCEAN wave power; ENDOSCOPIC ultrasonography
- Publication
Photonics, 2022, Vol 9, Issue 1, p37
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics9010037