Abstract
Multimode fibers (MMFs) show great promise as miniature probes for sensing, imaging, and spectroscopy applications. Different parameters of the fibers, such as numerical aperture, refractive index profile and length, have been already optimized for better performance. Here we investigate the role of the core shape, in particular for wavefront shaping applications where a focus is formed at the output of the MMF. We demonstrate that in contrast to a conventional round-core MMF, a square-core design does not suffer from focus aberrations. Moreover, we find that how the interference pattern behind a square-core fiber decorrelates with the input frequency is largely independent of the input light coupling. Finally, we demonstrate that a square core shape provides an on-average uniform distribution of the output intensity, free from the input-output correlations seen in round fibers, showing great promise for imaging and spectroscopy applications.
| Original language | English |
|---|---|
| Pages (from-to) | 6523-6531 |
| Number of pages | 9 |
| Journal | Optics Express |
| Volume | 29 |
| Issue number | 5 |
| Early online date | 16 Feb 2021 |
| DOIs | |
| Publication status | Published - 1 Mar 2021 |
Bibliographical note
Funding Information:Funding. Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWA (Grant No. QUOMPLEX (Grant No. 680.91.037), Veni (grant No. 15872)).
Publisher Copyright:
© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
Funding
Funding. Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWA (Grant No. QUOMPLEX (Grant No. 680.91.037), Veni (grant No. 15872)).
| Funders | Funder number |
|---|---|
| Not added | 15872 |
| Northwest Airlines | 680.91.037 |
