Comparison of round- and square-core fibers for sensing, imaging and spectroscopy

Matthias Christiaan Velsink; Zhouping Lyu; Pepijn W.H. Pinkse; Lyubov V. Amitonova

Comparison of round- and square-core fibers for sensing, imaging and spectroscopy

Matthias Christiaan Velsink, Zhouping Lyu, Pepijn W.H. Pinkse, Lyubov V. Amitonova^*

^*Corresponding author for this work

Research output: Working paper › Professional

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 doesn’t 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
Publisher	arXiv.org
Number of pages	9
Volume	2021
Publication status	Submitted - 18 Jan 2021

Publication series

Name	ArXiv

Keywords

Optics
Multimode fibers
Wavefront shaping
Spectroscopy

Access to Document

https://arxiv.org/abs/2101.07153

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title = "Comparison of round- and square-core fibers for sensing, imaging and spectroscopy",

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 doesn{\textquoteright}t 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 promisefor imaging and spectroscopy applications.",

keywords = "Optics, Multimode fibers, Wavefront shaping, Spectroscopy",

author = "Velsink, {Matthias Christiaan} and Zhouping Lyu and Pinkse, {Pepijn W.H.} and Amitonova, {Lyubov V.}",

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T1 - Comparison of round- and square-core fibers for sensing, imaging and spectroscopy

AU - Velsink, Matthias Christiaan

AU - Lyu, Zhouping

AU - Pinkse, Pepijn W.H.

AU - Amitonova, Lyubov V.

PY - 2021/1/18

Y1 - 2021/1/18

N2 - 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 doesn’t 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 promisefor imaging and spectroscopy applications.

AB - 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 doesn’t 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 promisefor imaging and spectroscopy applications.

KW - Optics

KW - Multimode fibers

KW - Wavefront shaping

KW - Spectroscopy

M3 - Working paper

VL - 2021

T3 - ArXiv

BT - Comparison of round- and square-core fibers for sensing, imaging and spectroscopy

PB - arXiv.org

ER -