High sensitivity temperature sensor based on a side-hole fiber

Zhenyu Yu; Tingting Lang; Jie Hu; Mengdan Chen; Kaige Ding; Li-Yang Shao

doi:10.1364/AO.418225

Applied Optics
Vol. 60,
Issue 12,
pp. 3474-3481
(2021)
•https://doi.org/10.1364/AO.418225

High sensitivity temperature sensor based on a side-hole fiber

Zhenyu Yu, Tingting Lang, Jie Hu, Mengdan Chen, Kaige Ding, and Li-Yang Shao

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Zhenyu Yu, Tingting Lang, Jie Hu, Mengdan Chen, Kaige Ding, and Li-Yang Shao, "High sensitivity temperature sensor based on a side-hole fiber," Appl. Opt. 60, 3474-3481 (2021)

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Table of Contents Category
- Fiber Optics, Fiber Sensors, and Optical Communications
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About this Article
History
- Original Manuscript: December 22, 2020
- Revised Manuscript: February 16, 2021
- Manuscript Accepted: February 26, 2021
- Published: April 19, 2021

Abstract

This paper proposes a temperature sensor based on a side-hole fiber (SHF). The sensor is formed by single-mode fiber (SMF)-coreless fiber (CLF)-SHF-CLF-SMF fusion splicing. The SHF adopts the dislocation fusion splicing method to ensure that one air hole is exposed. Two different interferences form a superposition, making the response more sensitive. The experiment shows that the sensitivity during heating and cooling is 1.587 nm/°C and 1.681 nm/°C, respectively, in the temperature range of 25–45°C. The sensor has high temperature sensitivity, exhibits easy processing, is smaller in size, and has important research value for temperature monitoring in daily life and industrial production.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Type	Size	Sensitivity	Range
Hollow-core fiber and inner zinc oxide film [20]	6 mm	25.24 pm/°C	20.9–460°C
MZI with Vernier effect [21]	4.5–5 cm	397 pm°C	10–70°C
Based on metal-filled side-hole PCF resonators [22]	1 cm	18.72 pm/°C	25–60°C
Based on a liquid-sealed S-tapered fiber [23]	10 mm	1.403 nm/°C	20–50°C
Based on nematic liquid crystal-filled PCF [24]	10.1 cm	3.90 nm/°C	44–53°C
Optical microfiber couplers [25]	1.6 mm	16.78 nm/°C	26–28.5°C
FBG with waveguide fabricated in NCF and MMF [18]	3 mm	9.81 pm/°C	20–80°C
Parallel-structured optical fiber in-line FPI [5]	100 µm	15.4 pm/°C	0–1000°C
This work based on SHFs	2.63 mm	1.681 nm/°C	25–45°C

Temperature (°C)	25	27	29	31	33	35
Refractive index	1.33249	1.332286	1.332082	1.331878	1.331674	1.33147
Temperature (°C)	37	39	41	43	45
Refractive index	1.331266	1.331062	1.330858	1.330654	1.33045

Type	Size	Sensitivity	Range
Hollow-core fiber and inner zinc oxide film [20]	6 mm	25.24 pm/°C	20.9–460°C
MZI with Vernier effect [21]	4.5–5 cm	397 pm°C	10–70°C
Based on metal-filled side-hole PCF resonators [22]	1 cm	18.72 pm/°C	25–60°C
Based on a liquid-sealed S-tapered fiber [23]	10 mm	1.403 nm/°C	20–50°C
Based on nematic liquid crystal-filled PCF [24]	10.1 cm	3.90 nm/°C	44–53°C
Optical microfiber couplers [25]	1.6 mm	16.78 nm/°C	26–28.5°C
FBG with waveguide fabricated in NCF and MMF [18]	3 mm	9.81 pm/°C	20–80°C
Parallel-structured optical fiber in-line FPI [5]	100 µm	15.4 pm/°C	0–1000°C
This work based on SHFs	2.63 mm	1.681 nm/°C	25–45°C

Temperature (°C)	25	27	29	31	33	35
Refractive index	1.33249	1.332286	1.332082	1.331878	1.331674	1.33147
Temperature (°C)	37	39	41	43	45
Refractive index	1.331266	1.331062	1.330858	1.330654	1.33045

Abstract

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Applied Optics