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

doi:10.1088/1674-1056/ab43be

中国物理B ›› 2019, Vol. 28 ›› Issue (11): 114201-114201.doi: 10.1088/1674-1056/ab43be

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

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

Min Li(李敏), Biao Feng(冯彪), Jiwen Yin(尹辑文)

1 College of Physics and Intelligent Manufacturing Engineering, Chifeng University, Chifeng 024000, China;
2 Department of Optoelectronics Science, Harbin Institute of Technology at Weihai, Weihai 264209, China

收稿日期:2019-07-10 修回日期:2019-09-02 出版日期:2019-11-05 发布日期:2019-11-05
通讯作者: Min Li E-mail:phdlimin@163.com
基金资助:
Project supported by the Scientific Research Project of Institutions of Higher Learning in Inner Mongolia Autonomous Region, China (Grant No. NJZY19214).

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

Min Li(李敏)¹, Biao Feng(冯彪)², Jiwen Yin(尹辑文)¹

1 College of Physics and Intelligent Manufacturing Engineering, Chifeng University, Chifeng 024000, China;
2 Department of Optoelectronics Science, Harbin Institute of Technology at Weihai, Weihai 264209, China

Received:2019-07-10 Revised:2019-09-02 Online:2019-11-05 Published:2019-11-05
Contact: Min Li E-mail:phdlimin@163.com
Supported by:
Project supported by the Scientific Research Project of Institutions of Higher Learning in Inner Mongolia Autonomous Region, China (Grant No. NJZY19214).

摘要/Abstract

摘要： A highly sensitive optical fiber temperature sensor based on a section of liquid-filled silica capillary tube (SCT) between single mode fibers is proposed. Two micro-holes are drilled on two sides of SCT directly by using femtosecond laser micromachining, and liquid polymer is filled into the SCT through the micro-holes without any air bubbles and then sealed by using ultra-violet (UV) cure adhesive. The sidewall of the SCT forms a Fabry-Perot resonator, and loss peaks are achieved in the transmission spectrum of the SCT at the resonant wavelength. The resonance condition can be influenced by the refractive index variation of the liquid polymer filled in SCT, which is sensitive to temperature due to its high thermo-optical coefficient (-2.98×10^-4℃^-1). The experimental result shows that the temperature sensitivity of the proposed fiber structure reaches 5.09 nm/℃ with a perfect linearity of 99.8%. In addition, it exhibits good repeatability and reliability in temperature sensing application.

关键词: optical fiber sensors, liquid filling, temperature measurement

Abstract: A highly sensitive optical fiber temperature sensor based on a section of liquid-filled silica capillary tube (SCT) between single mode fibers is proposed. Two micro-holes are drilled on two sides of SCT directly by using femtosecond laser micromachining, and liquid polymer is filled into the SCT through the micro-holes without any air bubbles and then sealed by using ultra-violet (UV) cure adhesive. The sidewall of the SCT forms a Fabry-Perot resonator, and loss peaks are achieved in the transmission spectrum of the SCT at the resonant wavelength. The resonance condition can be influenced by the refractive index variation of the liquid polymer filled in SCT, which is sensitive to temperature due to its high thermo-optical coefficient (-2.98×10^-4℃^-1). The experimental result shows that the temperature sensitivity of the proposed fiber structure reaches 5.09 nm/℃ with a perfect linearity of 99.8%. In addition, it exhibits good repeatability and reliability in temperature sensing application.

Key words: optical fiber sensors, liquid filling, temperature measurement

中图分类号: (Fiber optics)

42.81.-i

42.81.Pa (Sensors, gyros) 42.25.Hz (Interference) 82.35.-x (Polymers: properties; reactions; polymerization)

李敏, 冯彪, 尹辑文. Highly sensitive optical fiber temperature sensor based on resonance in sidewall of liquid-filled silica capillary tube[J]. 中国物理B, 2019, 28(11): 114201-114201.

Min Li(李敏), Biao Feng(冯彪), Jiwen Yin(尹辑文). Highly sensitive optical fiber temperature sensor based on resonance in sidewall of liquid-filled silica capillary tube[J]. Chin. Phys. B, 2019, 28(11): 114201-114201.

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

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

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