169 research outputs found
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 the
diffraction limit set by a single fiber core, while maintaining MCF
experimental feasibility. We demonstrate experimentally pixelation-free
lensless endoscopy imaging over a 120 micron 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.Comment: Submitted to Optics Letter
Single-shot non-interferometric measurement of the phase transmission matrix in multicore fibers
A simple technique for far-field single-shot non-interferometric
determination of the phase transmission matrix of a multicore fiber with over
100 cores is presented. This phase retrieval technique relies on the aperiodic
arrangement of the cores.Comment: Submitted to Optics Letter
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