Quasi-Distributed High-Temperature Monitoring System Based on Fiber Bragg Grating

Si Xiaolong; Wu Linfang; Zhuang Yan; Mou Chengbo; Liu Yunqi

doi:10.3788/LOP202158.0106001

Laser & Optoelectronics Progress, Volume. 58, Issue 1, 106001(2021)

Quasi-Distributed High-Temperature Monitoring System Based on Fiber Bragg Grating

Si Xiaolong¹, Wu Linfang¹, Zhuang Yan², Mou Chengbo¹, and Liu Yunqi^1、*

¹Key Laboratory of Specialty Fiber Optics and Optical Access Network, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China

²Shanghai Huayi New Material Co. Ltd., Shanghai 201507, China

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Figures & Tables(10)

Fig. 1. Fabrication of FBGs. (a) Transmission spectrum of FBGs under different pulse exposure conditions; (b) wavelength and contrast of FBGs under different pulse exposure conditions

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Fig. 2. Schematic diagram of annealing setup for FBGs

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Fig. 3. Annealing experiment results of FBGs. (a) Contrast of FBGs under high temperature; (b) transmission spectrum of FBG under 22.9 ℃; (c) transmission spectrum of FBG under 801 ℃

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Fig. 4. Experiment results of temperature sensing. (a) Repeatability experiments of temperature sensing; (b) fitting results of three experimental data

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Fig. 5. Stainless steel packaged FBG sensor

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Fig. 6. Schematic diagram of quasi-distribution temperature measurement. (a) Comprehensive schematic; (b) partial schematic

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Fig. 7. Relationship between wavelength of FBGs and annealing time

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Fig. 8. Calibration results of FBG (#31) temperature sensor

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Table 1. Effect of encapsulation using stainless steel tube on the temperature sensitivity of FBGs unit: pm·℃^-1
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Table 1. Effect of encapsulation using stainless steel tube on the temperature sensitivity of FBGs unit: pm·℃^-1
Encapsulation Temperature sensitivity
25-100 100-200 200-300 300-400
No 10.5 11.6 13.2 14.5
Yes 10.3 11.5 13.1 14.2

Table 2. Experimental results of quasi-distributed high temperature monitoring system unit: ℃
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Table 2. Experimental results of quasi-distributed high temperature monitoring system unit: ℃
Device Measured temperature
Thermocouple 197.6 212.9 229.8 248.9 268.3 271.3 273.0 280.9
FBG (#31) 197.791 212.797 229.974 249.028 268.167 271.117 273.147 281.012

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Si Xiaolong, Wu Linfang, Zhuang Yan, Mou Chengbo, Liu Yunqi. Quasi-Distributed High-Temperature Monitoring System Based on Fiber Bragg Grating[J]. Laser & Optoelectronics Progress, 2021, 58(1): 106001

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Paper Information

Category: Fiber Optics and Optical Communications

Received: May. 9, 2020

Accepted: --

Published Online: Jan. 27, 2021

The Author Email: Liu Yunqi (yqliu@shu.edu.cn)

DOI:10.3788/LOP202158.0106001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Effect of encapsulation using stainless steel tube on the temperature sensitivity of FBGs unit: pm·℃-1

Table 1. Effect of encapsulation using stainless steel tube on the temperature sensitivity of FBGs unit: pm·℃-1

Table 2. Experimental results of quasi-distributed high temperature monitoring system unit: ℃

Table 2. Experimental results of quasi-distributed high temperature monitoring system unit: ℃

Table 1. Effect of encapsulation using stainless steel tube on the temperature sensitivity of FBGs unit: pm·℃^-1

Table 1. Effect of encapsulation using stainless steel tube on the temperature sensitivity of FBGs unit: pm·℃^-1