Research on fiber optic enhanced dual F–P cavity temperature sensor based on circular concave silver film

Xin Tan; Zipeng Li; Qiao Yang; Zhanqing He; Jian Wang; Hui Qi

doi:10.1007/s11801-026-4171-8

Optoelectronics Letters ›› 2026, Vol. 22 ›› Issue (2) :65 -70. DOI: 10.1007/s11801-026-4171-8

Article

research-article

Research on fiber optic enhanced dual F–P cavity temperature sensor based on circular concave silver film

Author information +

History +

PDF

Abstract

This paper proposes a method that combines etching, masking, and magnetron sputtering techniques to prepare a ring-shaped silver mirror structure on the end face of a standard multimode optical fiber. By utilizing the capillary effect to fill a capillary glass tube with polydimethylsiloxane (PDMS), a structure consisting of a PDMS cavity and an air cavity is made, resulting in the achievement of a fiber optic dual Fabry–Perot (F–P) cavity temperature sensor with a ring-shaped silver mirror structure. When the external temperature changes, both the cavity length and the refractive index of PDMS change, causing variations in the intensity of interference light. The annular silver mirror utilizes its high reflectivity to allow more light to enter the receiving end, resulting in a more pronounced change in photon count. Within the range of 25–80 °C, sensitivity of 150.74 cps/°C and linearity of 0.998 have been achieved. Our optical fiber temperature sensor has demonstrated cost-effectiveness, wide range, and high stability in temperature detection through multiple repeated experiments.

Keywords

Cite this article

Download citation ▾

Xin Tan, Zipeng Li, Qiao Yang, Zhanqing He, Jian Wang, Hui Qi. Research on fiber optic enhanced dual F–P cavity temperature sensor based on circular concave silver film. Optoelectronics Letters, 2026, 22(2): 65-70 DOI:10.1007/s11801-026-4171-8

登录浏览全文

4963

注册一个新账户忘记密码

References

Publishing order | Descend order by publishing year | Descend order by cited within

[1]	Sadeque M S B, Chowdhury H K, Rafique Met al. . Hydrogel-integrated optical fiber sensors and their applications: a comprehensive review. Journal of materials chemistry C. 2023, 11(28): 9383-9424. J]

[2]	Ren Y, Song H, Cai Qet al. . Modeling analysis and experimental study on epoxy packaged FBG sensor for cryogenic temperature measurement. Optical fiber technology. 2024, 84: 103710. J]

[3]	Tang Y X, Zhang X, Zhu X Set al. . Dielectric layer thickness insensitive EVA/Ag-coated hollow fiber temperature sensor based on long-range surface plasmon resonance. Optics express. 2021, 29(1): 368-376. J]

[4]	Zhao X, Wu X, Zuo Cet al. . Sensitivity-enhanced temperature sensor utilizing core offset and hollow core Bragg fiber. Optical fiber technology. 2023, 75: 103165. J]

[5]	Liu Q, Wang C, Liu Wet al. . Large-range and high-sensitivity fiber optic temperature sensor based on Fabry–Pérot interferometer combined with FBG. Optical fiber technology. 2022, 68102794. J]

[6]	Chen F, Sheng S, Jiang Wet al. . Ultra-sensitive fiber-optic temperature sensor based on UV glue-based FPI and Vernier effect. Infrared physics & technology. 2024, 139105311. J]

[7]	Zhou G, Li L, Zhou Yet al. . High-sensitivity seawater refraction index optical measurement sensor based on a position-sensitive detector. Sensors. 2024, 2472050. J]

[8]	Li H, Chen H, Ullah Set al. . High-order LP modes based Sagnac interference for temperature sensing with an enhanced optical Vernier effect. Optics express. 2024, 32916140-16155. J]

[9]	Liu Y, Wen J, Feng Yet al. . Miniaturized high-sensitivity temperature sensor based on cascaded fiber-optic FPI. IEEE photonics technology letters. 2023, 358430-433. J]

[10]	Chen Z, Tong R, Xing Bet al. . Fabry-Perot parallel type high sensitivity fiber optic temperature sensor based on vernier effect beyond free spectral range measurement. Sensors and actuators A: physical. 2024, 370115241. J]

[11]	YANG R, TIAN J, CHEN Z, et al. High sensitivity optical fiber temperature sensor based upon a polydimethylsiloxane filled Fabry-Perot interferometer[J]. Instrumentation science & technology, 2024: 1–12.

[12]	Zhao H, Wang F, Han Zet al. . Simultaneous measurement of temperature and refractive index based on plastic optical fiber knots and F–P interferometer. Measurement science and technology. 2023, 351015138. J]

[13]	De Carvalho P V T, Martinez M A G, Giraldi M T R. Analysis of single-channel SPR–SMS refractive index and temperature sensor. Optical and quantum electronics. 2023, 558709. J]

[14]	Zhu X, Chen H, Jiang Cet al. . In-fiber Fabry-Perot temperature sensor using silicone-oil-filled the quartz capillary tube. Optical fiber technology. 2022, 71102937. J]

[15]	Xu T T, Yang Y Q, Yang W Let al. . Cascaded dual-cavity temperature sensor based on PDMS film encapsulated hollow core fiber. Acta optica sinica. 2022, 4280806004[J]

[16]	Pan R, Liu M, Bian Yet al. . High-sensitive temperature sensor with parallel PDMS-filled FPIs based on dual Vernier effect. Optics communications. 2022, 518128284. J]

[17]	Zheng Y, Chen Y, Zhang Qet al. . High-sensitivity temperature sensor based on fiber Fabry-Pérot interferometer with UV glue-filled hollow capillary fiber. Sensors. 2023, 23187687. J]

[18]	YIN Z K, LV R Q, ZHANG J Y, et al. Optical fiber temperature sensor based on PDMS-filled air-cavity Fabry-Perot structure[J]. IEEE transactions on instrumentation and measurement, 2023, 72.

[19]	Wang X, Wang Y. A direct proof of the relationship between the intensity of light and the number of photons. Journal of Hunan University: Natural Science Edition. 2000, 2714[J]

[20]	DUAN D, KAVATAMANE V K, ARUMUGAM S R, et al. Enhancing fluorescence excitation and collection from the nitrogen-vacancy center in diamond through a micro-concave mirror[J]. Applied physics letters, 2018, 113(4).