High-Sensitivity Fabry–Perot Interferometer High-Temperature Fiber Sensor Based on Vernier Effect

Lei, Xueqin; Dong, Xiaopeng

doi:10.1109/jsen.2020.2970579

Cited by 46 publications

(14 citation statements)

References 22 publications

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“…In last decade, several fiber optic sensors have been realized and reported for temperature sensing. These interferometers include Fiber Brag Grating (FBG) [1][2][3][4], Long-Period Fiber Grating (LPFG) [5][6][7][8], Mode field interferometers [9,10], Mach-Zehnder Interferometers (MZI) [11][12][13][14][15][16], Michelson Interferometers (MI) [17,18], Fabry-Perot Interferometers (FPI) [19][20][21][22][23], Hybrid Interferometers (MZI and FPI) [12,14,24], Interferometer composed of Silicon-on-Insulators (SOI) [25], and Surface Plasma Resonance (SPR) [26]. In these configurations, mostly silica is used as a sensing element for temperature measurement.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Polymer Based Fabry-Perot Interferometer for Temperature Sensing

Abbas¹,

Mumtaz²,

Dai³

et al. 2021

PIER Letters

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A highly sensitive temperature sensor based on a polymer cavity of a Fabry-Perot interferometer (FPI) is experimentally demonstrated. The interferometer gives ease in fabrication, and it can be formed by the induction of a thermos-sensitive polymer layer in between two single mode fibers (SMFs). The polymer is used as an FPI cavity for temperature sensing. Due to high thermal expansion coefficient (TEC) and thermos-optic coefficient (TOC) of polymer make the interferometer highly sensitive to ambient temperature. The maximum temperature sensitivity of 2.2209 nm/ • C for the polymer FPI cavity of 40.61 µm in the ambient temperature range of 28 • C to 34 • C is obtained. The proposed sensor shows the advantages of high sensitivity, compactness, simple fabrication, and low cost. Thus, it may become a part of various practical applications in the field of environmental science and engineering sciences.

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Section: Introductionmentioning

confidence: 99%

Highly Sensitive Polymer Based Fabry-Perot Interferometer for Temperature Sensing

Abbas¹,

Mumtaz²,

Dai³

et al. 2021

PIER Letters

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show abstract

“…A S A TYPE of optical interferometer, FPI has gained considerable attention and has been widely applied in various sensing purposes, such as refractive index [1], [2], temperature [3], [4], strain [5], [6], pressure [7], [8] and curvature [9]- [11], etc. For fiber-optic sensors based on FPIs, the signal demodulation methods can be divided to two types: the wavelength tracking method [12] and the peak-to-peak method [13], [14].…”

Section: Introductionmentioning

confidence: 99%

A High-Precision Method for the Determination of Cavity Length of a Fabry-Perot Interferometer

2022

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A novel method to obtain the cavity length of a Fabry-Perot interferometer (FPI) precisely based on the Vernier effect via a virtually variable reference FPI is proposed in this paper. Compared with the traditional method based on the measurement of wavelength spacing between two adjacent peaks in the spectrum of a single FPI, or enlarge the wavelength spacing with the Vernier effect by incorporating a real reference FPI in the sensor part, the present scheme is more flexible and applicable. By scanning the cavity length of the virtual reference FPI digitally, the accurate cavity length of the real FPI can be obtained when the free spectrum range (FSR) of the spectrum envelope of the combined FPIs reaches a maximum. Both theoretical analysis and experimental results show that the proposed scheme is superior to traditional methods, and with the present measurement condition, more than 20 times accuracy improvement for the determination of cavity length can be achieved.

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“…In recent years, many high‐sensitivity temperature sensors based on FPI structure have been invented. There are two main types of high‐sensitivity FPI temperature sensors: (1) based on thermal‐sensitive materials 7–12 and (2) based on the Vernier effect 13–22 . In the first type, a few types of thermal‐sensitive materials are used, including polydimethylsiloxane (PDMS), ultraviolet glue (NOA65), polystyrene, and polymethyl methacrylate.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive temperature sensing probe based on two cascaded Fabry–Perot interferometers and Vernier effect

Zhu

Jiang

Chen

et al. 2022

Micro & Optical Tech Letters

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In this paper, a temperature sensing probe is designed using two cascaded Fabry-Perot interferometers (FPIs). FPI1 is made by splicing single-mode optical fiber (SMF)-no-core optical fiber-capillary-SMF in turn, and then drilling a micro-hole on the capillary wall of FPI 1 with femtosecond laser, and injecting dimethyl silicone oil (DSO) into the capillary through the micro-hole with immersion method. FPI 2 is made by splicing SMF-capillary-SMF sequentially. Due to the thermal sensitivity of DSO, the temperature sensitivity of a single FPI 1 reaches −0.3674 nm/°C. When the free spectral ranges of FPI 1 and FPI 2 are close, their cascaded sensor will produce a Vernier effect for improving the sensitivity. The experimental results show that the sensitivity of the sensing probe is as high as 1.8456 nm/°C. In addition, the sensor has a compact structure and can be used flexibly in confined space temperature measurement.

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High-Sensitivity Fabry–Perot Interferometer High-Temperature Fiber Sensor Based on Vernier Effect

Cited by 46 publications

References 22 publications

Highly Sensitive Polymer Based Fabry-Perot Interferometer for Temperature Sensing

Highly Sensitive Polymer Based Fabry-Perot Interferometer for Temperature Sensing

A High-Precision Method for the Determination of Cavity Length of a Fabry-Perot Interferometer

Highly sensitive temperature sensing probe based on two cascaded Fabry–Perot interferometers and Vernier effect

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