Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber

Abstract We demonstrate halving the record-low loss of interconnection between a nested antiresonant nodeless type hollow-core fiber (NANF) and standard single-mode fiber (SMF). The achieved interconnection loss of 0.15 dB is only 0.07 dB above the theoretically-expected minimum loss. We also optimi...

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Autores principales:	Dmytro Suslov, Matěj Komanec, Eric R. Numkam Fokoua, Daniel Dousek, Ailing Zhong, Stanislav Zvánovec, Thomas D. Bradley, Francesco Poletti, David J. Richardson, Radan Slavík
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1ad788ba90104e1ebbdbe91fd4b9dadd
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spelling	oai:doaj.org-article:1ad788ba90104e1ebbdbe91fd4b9dadd2021-12-02T13:39:55ZLow loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber10.1038/s41598-021-88065-22045-2322https://doaj.org/article/1ad788ba90104e1ebbdbe91fd4b9dadd2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88065-2https://doaj.org/toc/2045-2322Abstract We demonstrate halving the record-low loss of interconnection between a nested antiresonant nodeless type hollow-core fiber (NANF) and standard single-mode fiber (SMF). The achieved interconnection loss of 0.15 dB is only 0.07 dB above the theoretically-expected minimum loss. We also optimized the interconnection in terms of unwanted cross-coupling into the higher-order modes of the NANF. We achieved cross-coupling as low as −35 dB into the LP $$_{11}$$ 11 mode (the lowest-loss higher-order mode and thus the most important to eliminate). With the help of simulations, we show that the measured LP $$_{11}$$ 11 mode coupling is most likely limited by the slightly imperfect symmetry of the manufactured NANF. The coupling cross-talk into the highly-lossy LP $$_{02}$$ 02 mode ( $$>2000$$ > 2000 dB/km in our fiber) was measured to be below −22 dB. Furthermore, we show experimentally that the anti-reflective coating applied to the interconnect interface reduces the insertion loss by 0.15 dB while simultaneously reducing the back-reflection below −40 dB over a 60 nm bandwidth. Finally, we also demonstrated an alternative mode-field adapter to adapt the mode-field size between SMF and NANF, based on thermally-expanded core fibers. This approach enabled us to achieve an interconnection loss of 0.21 dB and cross-coupling of −35 dB into the LP $$_{11}$$ 11 mode.Dmytro SuslovMatěj KomanecEric R. Numkam FokouaDaniel DousekAiling ZhongStanislav ZvánovecThomas D. BradleyFrancesco PolettiDavid J. RichardsonRadan SlavíkNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dmytro Suslov Matěj Komanec Eric R. Numkam Fokoua Daniel Dousek Ailing Zhong Stanislav Zvánovec Thomas D. Bradley Francesco Poletti David J. Richardson Radan Slavík Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber
description	Abstract We demonstrate halving the record-low loss of interconnection between a nested antiresonant nodeless type hollow-core fiber (NANF) and standard single-mode fiber (SMF). The achieved interconnection loss of 0.15 dB is only 0.07 dB above the theoretically-expected minimum loss. We also optimized the interconnection in terms of unwanted cross-coupling into the higher-order modes of the NANF. We achieved cross-coupling as low as −35 dB into the LP $$_{11}$$ 11 mode (the lowest-loss higher-order mode and thus the most important to eliminate). With the help of simulations, we show that the measured LP $$_{11}$$ 11 mode coupling is most likely limited by the slightly imperfect symmetry of the manufactured NANF. The coupling cross-talk into the highly-lossy LP $$_{02}$$ 02 mode ( $$>2000$$ > 2000 dB/km in our fiber) was measured to be below −22 dB. Furthermore, we show experimentally that the anti-reflective coating applied to the interconnect interface reduces the insertion loss by 0.15 dB while simultaneously reducing the back-reflection below −40 dB over a 60 nm bandwidth. Finally, we also demonstrated an alternative mode-field adapter to adapt the mode-field size between SMF and NANF, based on thermally-expanded core fibers. This approach enabled us to achieve an interconnection loss of 0.21 dB and cross-coupling of −35 dB into the LP $$_{11}$$ 11 mode.
format	article
author	Dmytro Suslov Matěj Komanec Eric R. Numkam Fokoua Daniel Dousek Ailing Zhong Stanislav Zvánovec Thomas D. Bradley Francesco Poletti David J. Richardson Radan Slavík
author_facet	Dmytro Suslov Matěj Komanec Eric R. Numkam Fokoua Daniel Dousek Ailing Zhong Stanislav Zvánovec Thomas D. Bradley Francesco Poletti David J. Richardson Radan Slavík
author_sort	Dmytro Suslov
title	Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber
title_short	Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber
title_full	Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber
title_fullStr	Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber
title_full_unstemmed	Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber
title_sort	low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1ad788ba90104e1ebbdbe91fd4b9dadd
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Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber

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