Extended field-of-view in a lensless endoscope using an aperiodic multicore fiber

We investigate lensless endoscopy using coherent beam combining and aperiodic multicore fibers (MCF). We show that diffracted orders, inherent to MCF with periodically arranged cores, dramatically reduce the field-of-view (FoV), and that randomness in MCF core positions can increase the FoV up to th...

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Bibliographic Details
Published in:Optics letters 2016-08, Vol.41 (15), p.3531-3534
Main Authors: Sivankutty, Siddharth, Tsvirkun, Viktor, Bouwmans, Géraud, Kogan, Dani, Oron, Dan, Andresen, Esben Ravn, Rigneault, Hervé
Format: Article
Language:English
Subjects:
Engineering Sciences
Optics
Photonic
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Summary:We investigate lensless endoscopy using coherent beam combining and aperiodic multicore fibers (MCF). We show that diffracted orders, inherent to MCF with periodically arranged cores, dramatically reduce the field-of-view (FoV), and that randomness in MCF core positions can increase the FoV up to the diffraction limit set by a single fiber core, while maintaining a MCF experimental feasibility. We demonstrate experimentally pixelation-free lensless endoscopy imaging over a 120 μm FoV with an aperiodic MCF designed with widely spaced cores. We show that this system is suitable to perform beam scanning imaging by simply applying a tilt to the proximal wavefront.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.41.003531