Highly sensitive optical fiber temperature sensor based on resonance in sidewall of liquid-filled silica capillary tube*

Feng, Biao; Yin, Jiwen

doi:10.1088/1674-1056/ab43be

Cited by 8 publications

(5 citation statements)

References 22 publications

(24 reference statements)

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“…A comparison of various temperature-sensing schemes and the interrogation approaches is shown in Table 1. Indeed, the interrogation resolution of our work should be improved compared with that in the work of Li et al [4] However, unlike the wavelength interrogation scheme based on an OSA, [4,14,15] our work achieves wavelength-to-frequency mapping in the electrical domain, illustrating a potential method of highspeed interrogation that supports a wide linear interrogation range by avoiding overlapping of the measured spectrum. [18] Note that the interrogation speed reaches the MHz range when a digital signal processor unit is used.…”

Section: Resultsmentioning

confidence: 79%

“…[20] Such an OEO-based interrogation system with high resolution and high speed would support practical applications such as bridge security monitoring and industrial machinery sensing. Liquid-filled silica capillary tube [4] Wavelength interrogation Slow 5.086 nm/ • C 0.0039 25-55 based on OSA Long period grating [14] Wavelength interrogation Slow 1.316 nm/ • C 0.0152 25-45 based on OSA Thin fiber-based Sagnac interferometer (SI) [15] Wavelength interrogation Slow 1.55 nm/ • C 0.013 30-94.5 based on OSA Fiber surface plasmon resonance [16] Wavelength interrogation Fast 1.765 nm/ • C 0.198 35-95 based on spectrometer SI [13] Frequency interrogation Fast 2.66 MHz/ • C 0.096 16.5-61.5 based on OEO Mach-Zehnder interferometer [17] Frequency interrogation Fast 3.7 MHz/…”

Section: Resultsmentioning

confidence: 99%

“…Optical fiber sensors, with their advantages of light weight, compact size and immunity to electromagnetic interference, have been widely used in the diagnosis and monitoring of environmental conditions. [1][2][3][4] Among the various optical fiber sensors, the Michelson interferometer (MI), with its merits of ease of fabrication and high sensitivity, has applications in aeronautics, perimeter protection, bridge security monitoring and environmental condition monitoring. [5][6][7][8] However, MIs are conventionally interrogated by wavelength interrogation or Fourier transform, which requires an optical spectrum analyzer (OSA).…”

Section: Introductionmentioning

confidence: 99%

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Optoelectronic oscillator-based interrogation system for Michelson interferometric sensors

Liu¹,

Wu²,

Liu³

et al. 2022

Chinese Phys. B

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High-performance interrogation systems for optical fiber sensors are extensively required in applications of environmental condition monitoring. In this article, we propose and demonstrate a Michelson interferometer (MI) interrogation system based on optoelectronic oscillator (OEO). The frequency of the OEO is related to the free spectral range (FSR) of the MI. Thus, when the FSR of the MI varies with the change of the external physical factors, the frequency of the OEO would shift and can be used for interrogation. We demonstrate that the temperature sensitivity and interrogation resolution are 35.35 MHz/℃ and 0.012 ℃, respectively. Such OEO-based scheme enables wavelength-to-frequency mapping and promises the wide linear interrogation range, high-resolution and high-speed interrogation.

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optoelectronic oscillator-based interrogation system for Michelson interferometric sensors

Liu¹,

Wu²,

Liu³

et al. 2022

Chinese Phys. B

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“…Fiber optic sensors are devices that integrate sensing and transmission capabilities, and are widely used due to their high temperature resistance, [10] small size, resistance to electromagnetic interference, and distributed detection. [11] Fiber optic sensing technology has experienced rapid development recently and has been used to acquire vibration acceleration vector signals.…”

Section: Introductionmentioning

confidence: 99%

Vector fiber Bragg gratings accelerometer based on silicone compliant cylinder for low frequency vibration monitoring

Chen

You

et al. 2023

Chinese Phys. B

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Vector accelerometer has attracted much attention for its great application potential in underground seismic signal measurement. We propose and demonstrate a novel vector accelerometer based on three fiber Bragg gratings (FBGs) embedded in a silicone rubber compliant cylinder at 120° distributed uniformly. The accelerometer is capable of detecting the orientation of vibration with a range of 0° ~ 360° and the acceleration through monitoring the central wavelength shifts of three FBGs simultaneously. The experimental results show that the natural frequency of the accelerometer is about 85 Hz, and the sensitivity is 84.21 pm/g in the flat range of 20 ~ 60 Hz. Through experimental calibration, the designed accelerometer can accurately obtain vibration vector information, including vibration orientation and acceleration. In addition, the range of resonant frequency and sensitivity can be expanded by adjusting the hardness of the silicone rubber materials. Due to the characteristics of small size and orientation recognition, the accelerometer can be applied to low-frequency vibration acceleration vector measurement in narrow spaces.

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“…However, with the advancement of technology, these shortcomings will be gradually overcome. In addition, because of their ability to resist electromagnetic interference, opticalfiber sensors [13][14][15][16] have certain development prospects in the extreme environments of aeroengines.…”

Section: Introductionmentioning

confidence: 99%

High-precision and long-range optical fiber Fabry–Perot interferometer for high temperature measurement

Zhao¹,

Lin²,

Zhang³

et al. 2022

Meas. Sci. Technol.

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In order to solve the problem of near-field measurement of aero-engine, a novel large-range, high-precision Fabry-Perot interferometer (FPI) is developed in this paper, which is verified by high temperature experiment. Based on the principle of FPI wavelength drift and frequency spectrum drift, a double-beam interference FPI is designed. Through the analysis of the optical path difference between the two beams, the conclusion that the spectrum drifts to the long-wave direction with the increase of temperature is obtained. Moreover, through frequency spectrum analysis, the measurement error caused by the distortion of the spectrum is avoided, and it is found that the increase in temperature will cause the change in frequency spectrum. Due to the glass-type FPI temperature sensitivity is only 0.0011nm/℃, in order to improve the sensitivity, a ceramic material with higher thermal expansion coefficient was selected as the collimating tube, so that the sensitivity of the temperature sensor was as high as 0.691nm/℃ from normal temperature to 100℃. In order to meet the needs of a wide range of measurement from room temperature to 1000℃, the frequency drift method is utilized. Field experiments were carried out on the ceramic FPI at the tail spray of the aero-engine simulation platform, and the temperature response test from normal temperature to 1000℃ was completed, and the accuracy of the sensor reached 0.098%. In this paper, the principle, design, production and testing of optical fiber sensors are carried out. The developed optical fiber sensor has significance for the high temperature monitoring.

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Highly sensitive optical fiber temperature sensor based on resonance in sidewall of liquid-filled silica capillary tube*

Cited by 8 publications

References 22 publications

Optoelectronic oscillator-based interrogation system for Michelson interferometric sensors

Optoelectronic oscillator-based interrogation system for Michelson interferometric sensors

Vector fiber Bragg gratings accelerometer based on silicone compliant cylinder for low frequency vibration monitoring

High-precision and long-range optical fiber Fabry–Perot interferometer for high temperature measurement

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