A Low-Cost High-Temperature Sensor Based on Long-Period Fiber/Microfiber Gratings by Local Fictive Temperature Modification

Zhou, Guorui; Zhang, Chuanchao; Xie, Xiufang; Wan, Yi; Yao, Caizhen; Liu, Jun; Niu, Longfei; Miao, Xinxiang; Zhang, Hai; Jiang, Xiaodong; Xu, Shuxin; Lv, Haibing

doi:10.1155/2020/9076874

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…Moreover, a low cost and high temperature sensor based on LPFG proposed. The study stated that with temperature range of (25℃ -875℃), the sensor gave 0.37 nm/℃ as temperature sensitivity due to small diameter achieved by micro heater brushing method and the thermo-optic effect [18]. Recent study proposed S-taper embedded in LPFG sensor by using CO2 laser and fusion splicer for creating s-shape.…”

Section: Literature Reviewmentioning

confidence: 99%

Low Temperature Sensor Based on Etched LPFG with Different Materials Coating

Alshaikhli¹,

Wang²

2022

(MMEP

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A low temperature sensor based on etched Long Period Fiber Grating LPFG is proposed and demonstrated. A chemically etched LPFG sensor coated with (Indium In, Aluminum Al, Silver Ag, Palladium Pd and Titanium Ti) embedded within a build low temperature setup. The sensor investigation was carried out under temperature range of 20℃ to -150℃; and the resonance wavelength shift was collected with different cooling rates of (10, 15, 20, 25℃/min) in order to investigate the effect of cooling rates on the sensor performance. However, the experimental results show that 10 mm LPFG sensor with grating period of 400 µm offer temperature sensitivity of 1.5 times, 2 times, 2.5 times, 3 times and 3.5 times higher than bare LPFG for Ti-coated LPFG, Pd-coated LPFG, Ag-coated LPFG, Al-coated LPFG and In-coated LPFG respectively. The maximum measuring error is less than ±0.5℃, which confirms the effectively using of LPFG sensor in cryogenic application. Moreover, the overall resonance wavelength shifts are 1.213 nm, 1.532 nm, 1.935 nm, 2.015 nm, 2.397 nm and 2.671 for bare LPFG, Ti-coated LPFG, Pd-coated LPFG, Ag-coated LPFG, Al-coated LPFG and In-coated LPFG sensors respectively. According to the cooling rates, the results illustrate that as cooling rate increase, the sensor sensitivity decrease due to the sensor response. For more investigations, simulation work is carried out using MATLAB and the sensor shows a good agreement results between experimental and simulation measurements. It is worth to mention that the main findings will essentially contribute to choose suitable materials for coating LPFG for low temperature sensing purposes and will increase the existing knowledge about optical fiber sensor applications.

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Section: Literature Reviewmentioning

confidence: 99%

Low Temperature Sensor Based on Etched LPFG with Different Materials Coating

Alshaikhli¹,

Wang²

2022

(MMEP

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“…Due to their dielectric nature, numerous advantages can be distinguished: contactless operation, small dimension and weight, high efficiency and low cost. Different types of fiber optic temperature sensors have been proposed, e.g., fiber Bragg gratings (FBG) [5,21,22], tapered optical fibers [6,23,24], long-period gratings (LPG) [7,25,26], and Fabry-Perot (F-P) [27][28][29] or modal interferometers [8,11]. The sensitivity of temperature sensors based on FBG is limited due to small thermo-optic coefficient and glass thermal expansion [20,30].…”

Section: Introductionmentioning

confidence: 99%

Temperature Sensor Based on Periodically Tapered Optical Fibers

Guzowski

Lakomski

2021

Sensors

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In this paper, the fabrication and characterization of a temperature sensor based on periodically tapered optical fibers (PTOF) are presented. The relation between the geometry of the sensors and sensing ability was investigated in order to find the relatively simple structure of a sensor. Four types of PTOF structures with two, four, six and eight waists were manufactured with the fusion splicer. For each PTOF type, the theoretical free spectral range (FSR) was calculated and compared with measurements. The experiments were conducted for a temperature range of 20–70 °C. The results proved that the number of the tapered regions in PTOF is crucial, because some of the investigated structures did not exhibit the temperature response. The interference occurring inside the structures with two and four waists was found be too weak and, therefore, the transmission dip was hardly visible. We proved that sensors with a low number of tapered regions cannot be considered as a temperature sensor. Sufficiently more valuable results were obtained for the last two types of PTOF, where the sensor’s sensitivity was equal to 0.07 dB/°C with an excellent linear fitting (R2 > 0.99). The transmission dip shift can be described by a linear function (R2 > 0.97) with a slope α > 0.39 nm/°C.

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“…However, sapphire fibers and femtosecond laser lithography undoubtedly increase the cost and difficulty of sensor fabrication. In 2020, Zhou G R et al used a CO 2 laser to fabricate an LPFG on a single-mode fiber (SMF) that works from room temperature to 875 °C [ 17 ]. Although the LPFG does not use a special fiber, it requires laser lithography.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Measurement of a Fiber Probe Sensor Based on the Michelson Interferometer

Guo

Lian

Zhang

et al. 2021

Sensors

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In this paper, a fiber probe high-temperature sensor based on the Michelson Interferometer (MI) is proposed and experimentally verified. We used a fiber splicing machine to fabricate a taper of the single-mode fiber (SMF) end. The high order modes were excited at the taper, so that different modes were transmitted forward in the fiber and reflected by the end face of the fiber and then recoupled back to the fiber core to form MI. For comparison, we also coated a thin gold film on the fiber end to improve the reflectivity, and the reflection intensity was improved by 16 dB. The experimental results showed that the temperature sensitivity at 1506 nm was 80 pm/°C (100 °C~450 °C) and 109 pm/°C (450 °C~900 °C). The repeated heating and cooling processes showed that the MI structure had good stability at a temperature up to 900 °C. This fiber probe sensor has the advantages of a small size, simple structure, easy manufacturing, good stability, and broad application prospects in industrial and other environments.

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A Low-Cost High-Temperature Sensor Based on Long-Period Fiber/Microfiber Gratings by Local Fictive Temperature Modification

Cited by 6 publications

References 26 publications

Low Temperature Sensor Based on Etched LPFG with Different Materials Coating

Low Temperature Sensor Based on Etched LPFG with Different Materials Coating

Temperature Sensor Based on Periodically Tapered Optical Fibers

High-Temperature Measurement of a Fiber Probe Sensor Based on the Michelson Interferometer

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