High accuracy temperature sensing system exploiting a Sagnac interferometer and an optoelectronic oscillator

Liu, Ling; Gao, Han; Ning, Tigang; Pei, Li; Jiao, Z.; Li, Jing; Xu, Jun

doi:10.1016/j.optlastec.2019.105951

Cited by 10 publications

(8 citation statements)

References 21 publications

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“…This introduces an additional infinite impulse response (IIR)-MPF with a periodic response and narrow bandwidth nature for each peak. The FSR of the FRR-based IIR-MPF can be expressed as [12,13] ∆…”

Section: Principle Of Operationmentioning

confidence: 99%

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: Principle Of Operationmentioning

confidence: 99%

Optoelectronic oscillator-based interrogation system for Michelson interferometric sensors

Liu¹,

Wu²,

Liu³

et al. 2022

Chinese Phys. B

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“…Indeed, with OEOs it is possible to carry out the measurement or sensing of length, refractive index, temperature, angular velocity, load, strain, lowpower RF signal, magnetic field, amongst others (see Refs. [8][9][10][11][12][13][14][15][16] and references therein). For this purpose, several architectures were proposed for the efficiency of the method.…”

Section: Introductionmentioning

confidence: 99%

Efficient sensings of temperature, refractive index, and distance measurement using the cubic-nonlinear optoelectronic oscillators

2022

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“…The fundamental concept of using an OEO for optical fiber sensing is to convert the sensing parameters into the frequency change of the OEO generated microwave signal. Benefiting from the features, numerous OEO-based optical fiber sensors have been proposed for optical fiber length [6], temperature [7,8] refractive index [9] sensing and so on. Among the various structures, OEO-based FBG sensors, with advantages of simplest structure and interrogation scheme, have attracted significant attention.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect

et al. 2021

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Based on a dual-loop optoelectronic oscillator (OEO) with Vernier effect, a scheme of fiber Bragg grating (FBG) interrogation system with an improved scale factor has been proposed and experimentally demonstrated. Functioning as the optical carrier of the OEO, the reflection signal of two cascaded FBGs is divided into two optical beams by using a wavelength division multiplexer (WDM). The two optical beams at different wavelengths travel along single mode fibers with different lengths. After combined together by another WDM, the two optical beams go through a section of dispersion compensation fiber (DCF). The oscillating frequency shift of the OEO is determined by the overall time delay, which is affected by the wavelength change of the sensing FBG. Thus, the wavelength change of the sensing FBG can be converted into the oscillating frequency shift of the OEO. Furthermore, due to the length difference between the two optical beams, an obvious Vernier effect has been generated in the frequency response of the OEO. By detecting the frequency shift of the envelope peak of the frequency response curve, the sensitivity of the sensing interrogation can be enhanced greatly. A proof-of-concept OEO-based FBG sensor for axial strain sensing experiment is performed. The experimental results show that the sensitivity is about 0.31 KHz/μɛ for a single-loop OEO. By employing Vernier effect, the sensitivity can be improved to -11 KHz/μɛ, which is 35 times higher than that of the single-loop OEO.

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High accuracy temperature sensing system exploiting a Sagnac interferometer and an optoelectronic oscillator

Cited by 10 publications

References 21 publications

Optoelectronic oscillator-based interrogation system for Michelson interferometric sensors

Optoelectronic oscillator-based interrogation system for Michelson interferometric sensors

Efficient sensings of temperature, refractive index, and distance measurement using the cubic-nonlinear optoelectronic oscillators

Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect

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