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Frequency uncertainty improvement in a STFT-BOTDR using highly nonlinear optical fibers

Frequency uncertainty improvement in a STFT-BOTDR using highly nonlinear optical fibers
Frequency uncertainty improvement in a STFT-BOTDR using highly nonlinear optical fibers

The sensitivity of a sensor to strain or the temperature variations due to distributed Brillouin scattering are partially related to the type of fibers used and the Brillouin scattering induced effective index. In this paper, a highly nonlinear fiber that can generate a higher Brillouin scattering signal is compared to a standard single mode fiber in a short-time-Fourier-transform Brillouin optical time domain reflectometer (STFT-BOTDR). The results show that much higher signal to noise ratios of the Brillouin scattering spectrum and smaller frequency uncertainties in the sensing measurement can be achieved in the highly nonlinear fiber for comparable launched powers. With a measurement speed of 4 Hz, the frequency uncertainty can be 0.43 MHz, corresponding to 10 με in strain or 0.43°C in temperature uncertainty for the highly nonlinear fiber. In contrast, for the standard single mode fiber case, the value would increase to about 1.02 MHz (25 με or 1.02°C), demonstrating the advantage of the highly nonlinear fiber for distributed strain/temperature sensing.

1094-4087
3870-3881
Luo, Linqing
01afec27-f9e0-4979-8720-f60c2c6a8fcb
Parmigiani, Francesca
6a386833-5186-4448-875e-d691161aba62
Yu, Yifei
5796fabf-53ec-4312-a5c0-93c172023d88
Li, Bo
30acbe59-a3fe-47a8-9e6a-2dd279f38a7a
Soga, Kenichi
e43028e3-af4d-4ea4-a747-6cc6dacc849b
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Luo, Linqing
01afec27-f9e0-4979-8720-f60c2c6a8fcb
Parmigiani, Francesca
6a386833-5186-4448-875e-d691161aba62
Yu, Yifei
5796fabf-53ec-4312-a5c0-93c172023d88
Li, Bo
30acbe59-a3fe-47a8-9e6a-2dd279f38a7a
Soga, Kenichi
e43028e3-af4d-4ea4-a747-6cc6dacc849b
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828

Luo, Linqing, Parmigiani, Francesca, Yu, Yifei, Li, Bo, Soga, Kenichi and Yan, Jize (2018) Frequency uncertainty improvement in a STFT-BOTDR using highly nonlinear optical fibers. Optics Express, 26 (4), 3870-3881. (doi:10.1364/OE.26.003870).

Record type: Article

Abstract

The sensitivity of a sensor to strain or the temperature variations due to distributed Brillouin scattering are partially related to the type of fibers used and the Brillouin scattering induced effective index. In this paper, a highly nonlinear fiber that can generate a higher Brillouin scattering signal is compared to a standard single mode fiber in a short-time-Fourier-transform Brillouin optical time domain reflectometer (STFT-BOTDR). The results show that much higher signal to noise ratios of the Brillouin scattering spectrum and smaller frequency uncertainties in the sensing measurement can be achieved in the highly nonlinear fiber for comparable launched powers. With a measurement speed of 4 Hz, the frequency uncertainty can be 0.43 MHz, corresponding to 10 με in strain or 0.43°C in temperature uncertainty for the highly nonlinear fiber. In contrast, for the standard single mode fiber case, the value would increase to about 1.02 MHz (25 με or 1.02°C), demonstrating the advantage of the highly nonlinear fiber for distributed strain/temperature sensing.

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Accepted/In Press date: 31 December 2017
e-pub ahead of print date: 6 February 2018
Published date: 19 February 2018

Identifiers

Local EPrints ID: 417107
URI: https://eprints.soton.ac.uk/id/eprint/417107
ISSN: 1094-4087
PURE UUID: 78838278-99c8-41ef-a46a-707aadf6800e
ORCID for Francesca Parmigiani: ORCID iD orcid.org/0000-0001-7784-2829
ORCID for Jize Yan: ORCID iD orcid.org/0000-0002-2886-2847

Catalogue record

Date deposited: 19 Jan 2018 17:30
Last modified: 03 Dec 2019 01:50

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Contributors

Author: Linqing Luo
Author: Yifei Yu
Author: Bo Li
Author: Kenichi Soga
Author: Jize Yan ORCID iD

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