Record-breaking light coupling into nanostructured optical fibers under large incident angles

Oleh Yermakov; Henrik Schneidewind; Uwe Hübner; Torsten Wieduwilt; Matthias Zeisberger; Andrey Bogdanov; Yuri Kivshar; Markus A. Schmidt

doi:10.1117/12.2590790

Record-breaking light coupling into nanostructured optical fibers under large incident angles

Oleh Yermakov^*, Henrik Schneidewind, Uwe Hübner, Torsten Wieduwilt, Matthias Zeisberger, Andrey Bogdanov, Yuri Kivshar, Markus A. Schmidt^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Coupling of light into optical fibers is important for many applications, while for commonly used step-index optical fibers it massively drops for oblique incident angles >15 degrees, limiting their operational range to a narrow angle interval. In this work, we address this issue via inclusion of dielectric concentric ring-type nanostructures located in the core region of commercially available step-index fibers. Modification of fiber facet with the optimized ring-like nanostructure leads to polarization- and azimuthally-independent enhancement of in-coupling efficiency across the entire angle interval from 15 to 85 degrees. We develop the analytical model and show the percent-level of light in-coupling efficiency even at angles as large as 70 degrees, addressing a domain that is out-of-reach for fibers with unstructured end faces. The main result of this work is the enhancement of the in-coupling efficiency at large incident angles (>30 degrees) by several orders of magnitude with respect to a bare fiber. The results obtained are promising for any application that demands to remotely collect light under large angles, such as in-vivo spectroscopy, biosensing or quantum technology.

Original language	English
Title of host publication	Micro-structured and Specialty Optical Fibres VII
Editors	Kyriacos Kalli, Alexis Mendez, Pavel Peterka
Publisher	SPIE
ISBN (Electronic)	9781510643802
DOIs	https://doi.org/10.1117/12.2590790
Publication status	Published - 2021
Event	Micro-structured and Specialty Optical Fibres VII 2021 - Virtual, Online, Czech Republic Duration: 19 Apr 2021 → 23 Apr 2021

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11773
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Micro-structured and Specialty Optical Fibres VII 2021
Country/Territory	Czech Republic
City	Virtual, Online
Period	19/04/21 → 23/04/21

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10.1117/12.2590790

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Yermakov, O., Schneidewind, H., Hübner, U., Wieduwilt, T., Zeisberger, M., Bogdanov, A., Kivshar, Y., & Schmidt, M. A. (2021). Record-breaking light coupling into nanostructured optical fibers under large incident angles. In K. Kalli, A. Mendez, & P. Peterka (Eds.), Micro-structured and Specialty Optical Fibres VII Article 117730B (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11773). SPIE. https://doi.org/10.1117/12.2590790

@inproceedings{394d21b0d9fa4bb5a4fcaaac7a527ecb,

title = "Record-breaking light coupling into nanostructured optical fibers under large incident angles",

abstract = "Coupling of light into optical fibers is important for many applications, while for commonly used step-index optical fibers it massively drops for oblique incident angles >15 degrees, limiting their operational range to a narrow angle interval. In this work, we address this issue via inclusion of dielectric concentric ring-type nanostructures located in the core region of commercially available step-index fibers. Modification of fiber facet with the optimized ring-like nanostructure leads to polarization- and azimuthally-independent enhancement of in-coupling efficiency across the entire angle interval from 15 to 85 degrees. We develop the analytical model and show the percent-level of light in-coupling efficiency even at angles as large as 70 degrees, addressing a domain that is out-of-reach for fibers with unstructured end faces. The main result of this work is the enhancement of the in-coupling efficiency at large incident angles (>30 degrees) by several orders of magnitude with respect to a bare fiber. The results obtained are promising for any application that demands to remotely collect light under large angles, such as in-vivo spectroscopy, biosensing or quantum technology.",

keywords = "Diffraction, Gratings, Lab-on-fiber, Light coupling, Nanostructures, Optical fiber",

author = "Oleh Yermakov and Henrik Schneidewind and Uwe H{\"u}bner and Torsten Wieduwilt and Matthias Zeisberger and Andrey Bogdanov and Yuri Kivshar and Schmidt, {Markus A.}",

note = "Publisher Copyright: {\textcopyright} 2021 SPIE.; Micro-structured and Specialty Optical Fibres VII 2021 ; Conference date: 19-04-2021 Through 23-04-2021",

year = "2021",

doi = "10.1117/12.2590790",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Kyriacos Kalli and Alexis Mendez and Pavel Peterka",

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Yermakov, O, Schneidewind, H, Hübner, U, Wieduwilt, T, Zeisberger, M, Bogdanov, A, Kivshar, Y & Schmidt, MA 2021, Record-breaking light coupling into nanostructured optical fibers under large incident angles. in K Kalli, A Mendez & P Peterka (eds), Micro-structured and Specialty Optical Fibres VII., 117730B, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11773, SPIE, Micro-structured and Specialty Optical Fibres VII 2021, Virtual, Online, Czech Republic, 19/04/21. https://doi.org/10.1117/12.2590790

Record-breaking light coupling into nanostructured optical fibers under large incident angles. / Yermakov, Oleh; Schneidewind, Henrik; Hübner, Uwe et al.
Micro-structured and Specialty Optical Fibres VII. ed. / Kyriacos Kalli; Alexis Mendez; Pavel Peterka. SPIE, 2021. 117730B (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11773).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Record-breaking light coupling into nanostructured optical fibers under large incident angles

AU - Yermakov, Oleh

AU - Schneidewind, Henrik

AU - Hübner, Uwe

AU - Wieduwilt, Torsten

AU - Zeisberger, Matthias

AU - Bogdanov, Andrey

AU - Kivshar, Yuri

AU - Schmidt, Markus A.

PY - 2021

Y1 - 2021

N2 - Coupling of light into optical fibers is important for many applications, while for commonly used step-index optical fibers it massively drops for oblique incident angles >15 degrees, limiting their operational range to a narrow angle interval. In this work, we address this issue via inclusion of dielectric concentric ring-type nanostructures located in the core region of commercially available step-index fibers. Modification of fiber facet with the optimized ring-like nanostructure leads to polarization- and azimuthally-independent enhancement of in-coupling efficiency across the entire angle interval from 15 to 85 degrees. We develop the analytical model and show the percent-level of light in-coupling efficiency even at angles as large as 70 degrees, addressing a domain that is out-of-reach for fibers with unstructured end faces. The main result of this work is the enhancement of the in-coupling efficiency at large incident angles (>30 degrees) by several orders of magnitude with respect to a bare fiber. The results obtained are promising for any application that demands to remotely collect light under large angles, such as in-vivo spectroscopy, biosensing or quantum technology.

AB - Coupling of light into optical fibers is important for many applications, while for commonly used step-index optical fibers it massively drops for oblique incident angles >15 degrees, limiting their operational range to a narrow angle interval. In this work, we address this issue via inclusion of dielectric concentric ring-type nanostructures located in the core region of commercially available step-index fibers. Modification of fiber facet with the optimized ring-like nanostructure leads to polarization- and azimuthally-independent enhancement of in-coupling efficiency across the entire angle interval from 15 to 85 degrees. We develop the analytical model and show the percent-level of light in-coupling efficiency even at angles as large as 70 degrees, addressing a domain that is out-of-reach for fibers with unstructured end faces. The main result of this work is the enhancement of the in-coupling efficiency at large incident angles (>30 degrees) by several orders of magnitude with respect to a bare fiber. The results obtained are promising for any application that demands to remotely collect light under large angles, such as in-vivo spectroscopy, biosensing or quantum technology.

KW - Diffraction

KW - Gratings

KW - Lab-on-fiber

KW - Light coupling

KW - Nanostructures

KW - Optical fiber

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U2 - 10.1117/12.2590790

DO - 10.1117/12.2590790

M3 - Conference contribution

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Micro-structured and Specialty Optical Fibres VII

A2 - Kalli, Kyriacos

A2 - Mendez, Alexis

A2 - Peterka, Pavel

PB - SPIE

T2 - Micro-structured and Specialty Optical Fibres VII 2021

Y2 - 19 April 2021 through 23 April 2021

ER -

Yermakov O, Schneidewind H, Hübner U, Wieduwilt T, Zeisberger M, Bogdanov A et al. Record-breaking light coupling into nanostructured optical fibers under large incident angles. In Kalli K, Mendez A, Peterka P, editors, Micro-structured and Specialty Optical Fibres VII. SPIE. 2021. 117730B. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2590790

Record-breaking light coupling into nanostructured optical fibers under large incident angles

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