High performance interrogation by a composite-double-probe-pulse for ultra-weak FBG array

Yu Liu, Feng Wang, Xuping Zhang, Yixin Zhang, Weihong Xu, Lin Zhang

Research output: Contribution to journalConference article

Abstract

We propose and experimentally demonstrate a technique using a composite-double-probe-pulse (CDPP) to eliminate the effect of polarization fading for phase-sensitive optical time-domain reflectometry (Φ-OTDR) based on ultra-weak FBG (UWFBG) array. The CDPP is composed of two optical pulses whose spatial interval is equal to twice the spatial interval of adjacent UWFBGs in the UWFBG array. One optical pulse is a long optical pulse, and the other optical pulse is composed of two continuous short optical pulses, whose polarization states are orthogonal to each other. The width of the short pulse is equal to half of the width of the normal pulse and their frequencies are different from the long pulse. By using such a method to perform the sensing for the UWFBG array, distributed quantitative measurement can be realized with only direct detection scheme and the influence of polarization fading in the demodulation of signal is thoroughly eliminated.

Original languageEnglish
Article number110483U
JournalProceedings of SPIE - International Society for Optical Engineering
Volume11048
DOIs
Publication statusPublished - 14 Feb 2019
Event17th International Conference on Optical Communications and Networks, ICOCN 2018 - Zhuhai, China
Duration: 16 Nov 201819 Nov 2018

Fingerprint

interrogation
Laser pulses
Probe
High Performance
Composite
composite materials
probes
Composite materials
pulses
Polarization
Fading (radio)
Fading
fading
Demodulation
polarization
Reflectometry
intervals
Interval
Short Pulse
demodulation

Bibliographical note

Copyright 2019 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Keywords

  • Optical fiber sensors
  • phase demodulation
  • polarization fading
  • ultra-weak FBG array

Cite this

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title = "High performance interrogation by a composite-double-probe-pulse for ultra-weak FBG array",
abstract = "We propose and experimentally demonstrate a technique using a composite-double-probe-pulse (CDPP) to eliminate the effect of polarization fading for phase-sensitive optical time-domain reflectometry (Φ-OTDR) based on ultra-weak FBG (UWFBG) array. The CDPP is composed of two optical pulses whose spatial interval is equal to twice the spatial interval of adjacent UWFBGs in the UWFBG array. One optical pulse is a long optical pulse, and the other optical pulse is composed of two continuous short optical pulses, whose polarization states are orthogonal to each other. The width of the short pulse is equal to half of the width of the normal pulse and their frequencies are different from the long pulse. By using such a method to perform the sensing for the UWFBG array, distributed quantitative measurement can be realized with only direct detection scheme and the influence of polarization fading in the demodulation of signal is thoroughly eliminated.",
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High performance interrogation by a composite-double-probe-pulse for ultra-weak FBG array. / Liu, Yu; Wang, Feng; Zhang, Xuping; Zhang, Yixin; Xu, Weihong; Zhang, Lin.

In: Proceedings of SPIE - International Society for Optical Engineering, Vol. 11048, 110483U , 14.02.2019.

Research output: Contribution to journalConference article

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AU - Wang, Feng

AU - Zhang, Xuping

AU - Zhang, Yixin

AU - Xu, Weihong

AU - Zhang, Lin

N1 - Copyright 2019 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

PY - 2019/2/14

Y1 - 2019/2/14

N2 - We propose and experimentally demonstrate a technique using a composite-double-probe-pulse (CDPP) to eliminate the effect of polarization fading for phase-sensitive optical time-domain reflectometry (Φ-OTDR) based on ultra-weak FBG (UWFBG) array. The CDPP is composed of two optical pulses whose spatial interval is equal to twice the spatial interval of adjacent UWFBGs in the UWFBG array. One optical pulse is a long optical pulse, and the other optical pulse is composed of two continuous short optical pulses, whose polarization states are orthogonal to each other. The width of the short pulse is equal to half of the width of the normal pulse and their frequencies are different from the long pulse. By using such a method to perform the sensing for the UWFBG array, distributed quantitative measurement can be realized with only direct detection scheme and the influence of polarization fading in the demodulation of signal is thoroughly eliminated.

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