A Comprehensive Study of Optical Frequency Domain Reflectometry

Liang, Changshuo; Bai, Qing; Yan, Min; Wang, Yu; Zhang, Hongjuan; Jin, Baoquan

doi:10.1109/access.2021.3061250

Cited by 62 publications

(19 citation statements)

References 97 publications

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“…A refractive index (RI) fluctuation in the optical fibre causes this scattered light in the optical fibres 2 , 3 . Backscatter reflectometry uses the backscattered light and by using cross-correlation of the spectra before and after strain changes and auto-correlation with spectra before strain change, the wavelength shift can be obtained 4 . This wavelength shift can then be used to obtain strain or temperature information based on the responsivity of the sensors.…”

Section: Introductionmentioning

confidence: 99%

Spectral characteristics of gold nanoparticle doped optical fibre under axial strain

Wang

Benedictus

Groves

2022

Sci Rep

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Nanoparticle (NP) doping of optical fibres can be used to increase the intensity of the backscattered light used for distributed strain sensing and has shown the advantages of high precision strain detection and multiplex sensing experimentally. However, the backscatter spectral characteristics of NP-doped optical fibres have not been described even though they are quite different from the spectra from fibre Bragg gratings (FBGs) or commercial single mode fibres. In this paper, gold NPs, used as the contrast agent in the optical fibre to increase the intensity of the backscattered light, were investigated from the aspect of their spectra. A single scattering model with Mie theory and an effective refractive index (RI) model were used to evaluate the backscattered light spectra and the Monte Carlo Method was used for seeding NPs. The results showed that the strain responsivity of gold-NP doped fibres with low volume ratio doping (single scattering restriction) are close to FBGs and commercial fibres. High volume ratios of gold NP doping increase the imaginary part of the RI of the optical fibre, which has a significant influence on the spectra in the wavenumber domain. These theoretical insights may promote the future engineering design of NP-doped fibre sensors.

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Section: Introductionmentioning

confidence: 99%

Spectral characteristics of gold nanoparticle doped optical fibre under axial strain

Wang

Benedictus

Groves

2022

Sci Rep

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“…When the sensor experiences strain or temperature changes, Rayleigh scattered light is continuously generated in both the backward and forward directions. We record the backward-scattered Rayleigh light, which has a reflection spectrum with a frequency shift of Δ 36,37 where is the wavelength, ΔT is the temperature change, and ε represents the microstrain (unitless). The coefficient K is a strain constant, and K T is a temperature calibration constant that relates spectral shift to a strain or change in temperature values.…”

Section: Theory Of Optical Frequencydomain Reflectometry (Ofdr)mentioning

confidence: 99%

Potential applications of distributed optical fiber sensor in hydrate‐induced sedimentary deformation research

Teng

Wang

Zhou³

et al. 2021

Energy Science & Engineering

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“…Optical FMCW interference technology, also known as optical frequency domain reflectometry (OFDR) technology, is a technique that detects backward Rayleigh scattering to obtain position information on an optical fiber link. OFDR is widely used in distributed sensing [ 17 , 18 , 19 , 20 , 21 ]. In recent years, a number of researchers have used a combination of FBG and OFDR techniques for strain measurements.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Compensated Multi-Point Strain Sensing Based on Cascaded FBG and Optical FMCW Interferometry

Feng

Cheng

Chen

et al. 2022

Sensors

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We proposed a novel temperature-compensated multi-point strain sensing system based on cascaded FBG and optical FMCW interferometry. The former is used for simultaneous sensing of temperature and strain, and the latter is used for position information reading and multiplexing. In the experiment, a narrow linewidth laser with continuous frequency-sweeping was used as the light source. After demodulating the beat-frequency signal, the link information of the 16 m fiber was obtained, and the measured result was identical to the actual position. The measurement accuracy reached 50.15 mm, and the dynamic range was up to 22.68 dB. Meanwhile, we completed the sensing experiments for temperature range from 20 °C to 90 °C and strain range from 0 με to 7000 με. The sensitivity of the sensing system to temperature was 10.21 pm/°C, the sensitivity and accuracy to strain were as high as 1.163 pm/με and 10 με, respectively. Finally, the measured strain and temperature values were obtained using the sensing matrix. The sensing system has important practical significance in the field of quasi-distributed strain measurement.

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A Comprehensive Study of Optical Frequency Domain Reflectometry

Cited by 62 publications

References 97 publications

Spectral characteristics of gold nanoparticle doped optical fibre under axial strain

Spectral characteristics of gold nanoparticle doped optical fibre under axial strain

Potential applications of distributed optical fiber sensor in hydrate‐induced sedimentary deformation research

Temperature-Compensated Multi-Point Strain Sensing Based on Cascaded FBG and Optical FMCW Interferometry

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