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Optical fiber delay lines in microwave photonics: sensitivity to temperature and means to reduce it

Optical fiber delay lines in microwave photonics: sensitivity to temperature and means to reduce it
Optical fiber delay lines in microwave photonics: sensitivity to temperature and means to reduce it
One of the key functionalities in microwave photonics is to be able to define controllable time delays during the signal processing. Optical fibers are often used to achieve this functionality, especially when a long delay or a widely-tunable delay is needed. However, the stability of this delay in the presence of environmental changes (e.g., temperature) has not, to the best of our knowledge, been reviewed yet. Here, we firstly discuss the impact of temperature-induced variations on the signal propagation time in optical fibers and its implications in microwave photonics. We compare the impact of the thermal sensitivity of various delay lines for applications in which the signal is transported from point A to point B, as well as for applications in which the propagation time through a fiber or the fiber dispersion is used to create a fixed or tunable delay. In the second part of the paper we show the impact of fiber thermal sensitivity on a narrow-band microwave photonics filter made of standard single mode fiber (SSMF) and a hollow core fiber (HCF), which has significantly lower thermal sensitivity of propagation time to temperature. The central frequency of the band-pass filter changes almost 16 times more in the filter made of SSMF as compared to that of HCF, dictating very tight (0.05OC) temperature stabilization for SSMF- based filters. On the basis of our thermal sensitivity analysis we conclude that HCFs are very promising for environmentally stable microwave photonics applications.
fabry-perot, microwave filter, Microwave photonics, optical fiber applications
0733-8724
2311-2318
Ding, Meng
45fbd64c-522d-45ff-a918-013404105cdb
Feng, Zitong
21760dcd-7979-4733-bc84-dea53c64a81c
Marpaung, David
b5baef06-3fc4-41d7-9829-8e0f215c99cc
Zhang, Xi
4d8f388b-2c02-414d-92fe-550b12a8075e
Komanec, Matej
be991afd-3cb0-458a-a7c8-4557051e2bcf
Suslov, Dmytro
5a67f33b-9b3a-428e-910e-9fbc8d1a6248
Dousek, Daniel
e7308d3b-fdcc-4d9f-ad98-bc905774c860
Zvanovec, Stanislav
037bcfba-8cc7-4f6f-8226-72d29fe7e636
Numkam Fokoua, Eric
6d9f7e50-dc3b-440a-a0b9-f4a08dd02ccd
Bradley, Thomas
d4cce4f3-bb69-4e14-baee-cd6a88e38101
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Ding, Meng
45fbd64c-522d-45ff-a918-013404105cdb
Feng, Zitong
21760dcd-7979-4733-bc84-dea53c64a81c
Marpaung, David
b5baef06-3fc4-41d7-9829-8e0f215c99cc
Zhang, Xi
4d8f388b-2c02-414d-92fe-550b12a8075e
Komanec, Matej
be991afd-3cb0-458a-a7c8-4557051e2bcf
Suslov, Dmytro
5a67f33b-9b3a-428e-910e-9fbc8d1a6248
Dousek, Daniel
e7308d3b-fdcc-4d9f-ad98-bc905774c860
Zvanovec, Stanislav
037bcfba-8cc7-4f6f-8226-72d29fe7e636
Numkam Fokoua, Eric
6d9f7e50-dc3b-440a-a0b9-f4a08dd02ccd
Bradley, Thomas
d4cce4f3-bb69-4e14-baee-cd6a88e38101
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d

Ding, Meng, Feng, Zitong, Marpaung, David, Zhang, Xi, Komanec, Matej, Suslov, Dmytro, Dousek, Daniel, Zvanovec, Stanislav, Numkam Fokoua, Eric, Bradley, Thomas, Poletti, Francesco, Richardson, David J. and Slavík, Radan (2021) Optical fiber delay lines in microwave photonics: sensitivity to temperature and means to reduce it. IEEE Journal of Lightwave Technology, 39 (8), 2311-2318.

Record type: Article

Abstract

One of the key functionalities in microwave photonics is to be able to define controllable time delays during the signal processing. Optical fibers are often used to achieve this functionality, especially when a long delay or a widely-tunable delay is needed. However, the stability of this delay in the presence of environmental changes (e.g., temperature) has not, to the best of our knowledge, been reviewed yet. Here, we firstly discuss the impact of temperature-induced variations on the signal propagation time in optical fibers and its implications in microwave photonics. We compare the impact of the thermal sensitivity of various delay lines for applications in which the signal is transported from point A to point B, as well as for applications in which the propagation time through a fiber or the fiber dispersion is used to create a fixed or tunable delay. In the second part of the paper we show the impact of fiber thermal sensitivity on a narrow-band microwave photonics filter made of standard single mode fiber (SSMF) and a hollow core fiber (HCF), which has significantly lower thermal sensitivity of propagation time to temperature. The central frequency of the band-pass filter changes almost 16 times more in the filter made of SSMF as compared to that of HCF, dictating very tight (0.05OC) temperature stabilization for SSMF- based filters. On the basis of our thermal sensitivity analysis we conclude that HCFs are very promising for environmentally stable microwave photonics applications.

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R2_Meng_JLT_RFfilter_final_clean - Accepted Manuscript
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More information

Submitted date: 11 January 2021
Accepted/In Press date: 13 January 2021
Published date: 15 April 2021
Keywords: fabry-perot, microwave filter, Microwave photonics, optical fiber applications

Identifiers

Local EPrints ID: 446451
URI: http://eprints.soton.ac.uk/id/eprint/446451
ISSN: 0733-8724
PURE UUID: 285f1f88-108f-41fc-b78e-788d9d48a4bc
ORCID for Eric Numkam Fokoua: ORCID iD orcid.org/0000-0003-0873-911X
ORCID for Thomas Bradley: ORCID iD orcid.org/0000-0001-6568-5811
ORCID for Francesco Poletti: ORCID iD orcid.org/0000-0002-1000-3083
ORCID for David J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Radan Slavík: ORCID iD orcid.org/0000-0002-9336-4262

Catalogue record

Date deposited: 10 Feb 2021 17:33
Last modified: 13 Apr 2021 01:48

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Contributors

Author: Meng Ding
Author: Zitong Feng
Author: David Marpaung
Author: Xi Zhang
Author: Matej Komanec
Author: Dmytro Suslov
Author: Daniel Dousek
Author: Stanislav Zvanovec
Author: Thomas Bradley ORCID iD
Author: Radan Slavík ORCID iD

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