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First demonstration of opposing thermal sensitivities in hollow core fibers with open and sealed ends

First demonstration of opposing thermal sensitivities in hollow core fibers with open and sealed ends
First demonstration of opposing thermal sensitivities in hollow core fibers with open and sealed ends
It has been shown that both the output phase and propagation time of an optical signal propagating through a length of hollow core optical fiber (HCF) drifts with changes in environmental temperature significantly less than in conventional optical fibers. In all earlier experimental studies, however, the simplifying assumption was made that the thermo-optic effect of air was negligible. In this paper we present the first experimental demonstration that the air inside a HCF core can make an appreciable contribution to the fiber’s thermal sensitivity with the performance depending whether the fiber is open to the atmosphere, or sealed at both ends (e.g. spliced to solid fiber pigtails as is quite often the case in practice). We measure both the sensitivity of the accumulated phase as well as the signal propagation time for both open and sealed HCF and show that these are opposite in sign. Most importantly we show that the thermal sensitivity contribution from the air inside an open HCF has the opposite sign to the effect of fiber elongation (which is otherwise the dominant effect responsible for the overall thermal sensitivity of HCF). We then go on to show that these two effects can be used to balance each other out in order to achieve zero thermal sensitivity for both accumulated phase and propagation time. We demonstrate this property experimentally over a large spectral range.
0146-9592
Slavík, Radan
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Numkam Fokoua, Eric
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Bukshtab, Michael
d5393787-5bd2-4b5d-a22f-d18ed3d9052e
Chen, Yong
0bfb3083-4cd2-4463-a7a4-f48c4158b15a
Bradley, Thomas
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Sandoghchi, Seyed Reza
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Petrovich, Marco
bfe895a0-da85-4a40-870a-2c7bfc84a4cf
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Numkam Fokoua, Eric
6d9f7e50-dc3b-440a-a0b9-f4a08dd02ccd
Bukshtab, Michael
d5393787-5bd2-4b5d-a22f-d18ed3d9052e
Chen, Yong
0bfb3083-4cd2-4463-a7a4-f48c4158b15a
Bradley, Thomas
d4cce4f3-bb69-4e14-baee-cd6a88e38101
Sandoghchi, Seyed Reza
654977fa-6c6e-4b24-aece-7ac52027fe17
Petrovich, Marco
bfe895a0-da85-4a40-870a-2c7bfc84a4cf
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3

Slavík, Radan, Numkam Fokoua, Eric, Bukshtab, Michael, Chen, Yong, Bradley, Thomas, Sandoghchi, Seyed Reza, Petrovich, Marco, Poletti, Francesco and Richardson, David (2019) First demonstration of opposing thermal sensitivities in hollow core fibers with open and sealed ends. Optics Letters, 44 (16).

Record type: Article

Abstract

It has been shown that both the output phase and propagation time of an optical signal propagating through a length of hollow core optical fiber (HCF) drifts with changes in environmental temperature significantly less than in conventional optical fibers. In all earlier experimental studies, however, the simplifying assumption was made that the thermo-optic effect of air was negligible. In this paper we present the first experimental demonstration that the air inside a HCF core can make an appreciable contribution to the fiber’s thermal sensitivity with the performance depending whether the fiber is open to the atmosphere, or sealed at both ends (e.g. spliced to solid fiber pigtails as is quite often the case in practice). We measure both the sensitivity of the accumulated phase as well as the signal propagation time for both open and sealed HCF and show that these are opposite in sign. Most importantly we show that the thermal sensitivity contribution from the air inside an open HCF has the opposite sign to the effect of fiber elongation (which is otherwise the dominant effect responsible for the overall thermal sensitivity of HCF). We then go on to show that these two effects can be used to balance each other out in order to achieve zero thermal sensitivity for both accumulated phase and propagation time. We demonstrate this property experimentally over a large spectral range.

Text
HCF_OpenClose_OL_Revision_Final_shorter - Accepted Manuscript
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More information

Submitted date: 20 June 2019
Accepted/In Press date: 29 July 2019
e-pub ahead of print date: 30 July 2019
Additional Information: Dataset supporting this publication is: 49066913

Identifiers

Local EPrints ID: 433090
URI: https://eprints.soton.ac.uk/id/eprint/433090
ISSN: 0146-9592
PURE UUID: 5a499286-d4d0-4457-a697-44db589a33fd
ORCID for Radan Slavík: ORCID iD orcid.org/0000-0002-9336-4262
ORCID for Eric Numkam Fokoua: ORCID iD orcid.org/0000-0003-0873-911X
ORCID for Yong Chen: ORCID iD orcid.org/0000-0003-0383-6113
ORCID for Thomas Bradley: ORCID iD orcid.org/0000-0001-6568-5811
ORCID for Seyed Reza Sandoghchi: ORCID iD orcid.org/0000-0003-2196-3167
ORCID for Marco Petrovich: ORCID iD orcid.org/0000-0002-3905-5901
ORCID for Francesco Poletti: ORCID iD orcid.org/0000-0002-1000-3083
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 07 Aug 2019 16:30
Last modified: 08 Aug 2019 00:39

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