Ultrahigh-sensitivity temperature sensor based on resonance coupling in organic-liquids-infiltrated side-hole microstructured optical fibers

Abstract

In this paper, an organic-liquid-integrated side-hole microstructured optical fiber (SHMOF) sensor is proposed for high-sensitivity temperature measurement. The air holes of side-hole fibers are infiltrated with quinoline-dimethyl-sulfoxide mixture to excite the resonance coupling between two liquid rods and the solid fiber core. The fundamental core mode in the core region can be coupled into the liquid rod modes at specific wavelengths satisfying the phase matching condition, and the temperature-induced refractive index variation of the infiltrated materials would cause the resonance wavelength shift. By monitoring the resonance wavelength shift, high-sensitivity temperature sensing can be achieved. Further simulation results based on the finite element method are in accordance with the experimentally observed resonance shift behavior in response to the environmental temperature change. Experimental results show that the maximum sensitivity of the fabricated sensor reaches −4.88 nm/°C for the measurement range of 26.1 °C to 62 °C. Our proposed temperature sensing scheme possesses several desirable merits such as high sensitivity, compact structure and low cost, which is anticipated to find applications in various industrial as well as civil engineering areas.

Keywords

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References

[1] Yoichi K, Akihiro H. Fiber-optic sensor for distance and velocity measurements using speckle dynamics. Applied optics, 1985, 24(7): 955. J].

[2] Shaohui L, Dingfu Z, Gang Z, et al.. Fiber sensor used to monitor the content of C₂H₂ gas in transformer oil. International Conference on Sensors and Control Techniques, 2000. Wuhan, China, ICSC: 165-170. [C].

[3] He R J, Shen L Y, Wang Z, et al.. Optical fiber sensors for heart rate monitoring: a review of mechanisms and applications. Results in optics, 2023, 11: 100386. J].

[4] Katayama K, Chino S, Koyama S, et al.. Verification of blood pressure monitoring system using optical fiber sensor. Journal of fiber science and technology, 2020, 76(2): 79-87. J].

[5] ZHU H H, WU B, CAO D F, et al. Monitoring of soil moisture and temperature distributions in seasonally frozen ground with fiber optic sensors[J]. IOP conference series: earth and environmental science, 2021, 861(4).

[6] XU J J, TANG C S, CHENG Q, et al. Monitoring and early detection of soil desiccation cracking using distributed fiber optical sensing[J]. Géotechnique, 2022: 1–43.

[7] Liao W Y, Zhuang Y Y, Zeng C, et al.. Fiber optic sensors enabled monitoring of thermal curling of concrete pavement slab: temperature, strain and inclination. Measurement, 2020, 165: 108203. J].

[8] WANG H P, GUO Y X, LI Q M, et al. Optical fiber based pressure sensors developed for monitoring vehicle loads of asphalt pavements[J]. Proceedings of SPIE, 2021: 11607.

[9] Feng L L, Wang Y T, Ruan C, et al.. Road vehicle information collection system based on distributed fiber optics sensor. Advanced materials research, 2014, 3470(1030–1032): 2105-2109. J].

[10] Grattan K, Manwell J, Sim S, et al.. Fibre-optic temperature sensor with wide temperature range characteristics. Optoelectronics IEE proceedings J, 1987, 134(5): 291-291. J].

[11] Zhao W Z, Suna T, Grattana K, et al.. Temperature monitoring of vehicle engine exhaust gases under vibration condition using optical fibre temperature sensor systems. Journal of physics: conference series, 2006, 45: 215-222. [J].

[12] Chen G H, Sha J B, Zhao M, et al.. Simultaneous temperature and tension monitoring of a multi-layer composite film with embedded Hi-Bi optical fiber Bragg gratings. SPIE proceedings, 2016, 9852: 98520N. J].

[13] Zhao Z Y, Tang M, Fu S N, et al.. All-solid multi-core fiber-based multipath Mach–Zehnder interferometer for temperature sensing. Applied physics B, 2013, 112(4): 491-497. J].

[14] Wang M, Wu H, Tang M, et al.. Few-mode fiber based Raman distributed temperature sensing. Optics express, 2017, 25(5): 4907-4916. J].

[15] Stanimirović I, Stanimirović Z. Introductory chapter: temperature sensing-the book, 2018. Rijeka, IntechOpen. M].

[16] Yan B Q, Li J, Zhang M J, et al.. Raman distributed temperature sensor with optical dynamic difference compensation and visual localization technology for tunnel fire detection. Sensors, 2019, 19(10): 2320-2332. J].

[17] Bathe K J. Finite element method, 2000. Oxford, Butterworth-Heinemann. [M].

[18] Yang M L, Zhang H, Wang X, et al.. Microstructured optical fiber sensor for detection of temperature-dependent light-induced ionic liquid molecular polarizability. Journal of lightwave technology, 2025, 43(2): 957-965. J].

[19] Zhang R, Du W, Shao F, et al.. Voltage, thermal and magnetic field fiber sensors based on magnetic nanoparticles-doped photonic liquid crystal fibers. Optics express, 2023, 31(16): 25372-25384. J].

[20] Zhu Q C, Chen Z M, Hou J J, et al.. A fiber temperature sensor based on cascaded FBG and Sagnac interferometer with large measurement scale. 21st International Conference on Optical Communications and Networks, July 31–August 3, 2023, Qufu, China, 20231-3. [C].

[21] Fu X H, Li J Q, Lv S H, et al.. A temperature and curvature dual parametric sensors based on seven core fiber and taper-biconcave structure. IEEE sensors journal, 2024, 24(11): 17718-17724. J].

[22] Fu X H, Zhang Y X, Zhou J H, et al.. A temperature and strain dual-parameter sensor based on conical four-core fiber combined with a multimode fiber. IEEE sensors journal, 2022, 22(24): 23990-23996. J].

[23] Su Y D, Du Y H, Wang W, et al.. S-shaped tellurite optical fiber surface plasmon resonance sensor for temperature and refractive index measurement. Optics & laser technology, 2024, 179: 111385. J].

[24] Liu Y M, Tan Z W, Gu Z Y, et al.. Fiber temperature sensor based on Fabry–Pérot cavity generating optical Vernier effect. Optical fiber technology, 2024, 84: 103727. J].

[25] Tong R J, Zhao K J, Xing B, et al.. An optical fiber sensor for salinity and temperature simultaneous detection based on dual SPR effect. Optics & laser technology, 2024, 175: 110760. J].

[26] Fan H L, Dong W Z, Yang K S, et al.. UiO-66@Allylthiourea film coated optical fiber cadmium ion sensor with spiral grating temperature compensator. Optical fiber technology, 2024, 84: 103731. J].

[27] Zhang S Q, Zhao Y, Peng Y, et al.. High-sensitivity optical fiber SPR sensor with cascaded biconical fiber and hetero-core structure for simultaneous measurement of seawater salinity and temperature. Optics & laser technology, 2024, 170: 110275. J].

[28] Tong D, You Y Q, Su C B, et al.. Polymer-assisted sensitivity-enhanced temperature sensor for contact-type sensing. IEEE sensors journal, 2022, 24(19): 30014-30019. J].

[29] Li C F, Tong X L, Huang W Z, et al.. Study on the effects of organic bonding agent and low-temperature glass solder process on the performance of compact packaged fiber optic temperature sensors. IEEE sensors journal, 2024, 24(12): 19202-19209. J].

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Tianjin University of Technology