High-Sensitivity Temperature Measurement Based on SPR in Gold-PDMS-Coated Photonic Crystal Fiber

Liu Hai; Bai Bingbing; Zhang Yanzeng; Chen Cong; Shao Qiyuan; Wang Haoran

doi:10.3788/CJL202047.0404003

Chinese Journal of Lasers, Volume. 47, Issue 4, 404003(2020)

High-Sensitivity Temperature Measurement Based on SPR in Gold-PDMS-Coated Photonic Crystal Fiber

Liu Hai^*, Bai Bingbing, Zhang Yanzeng, Chen Cong, Shao Qiyuan, and Wang Haoran

Author Affiliations

School of Information and Control Engineering, China University of Mining and Technology,Xuzhou, Jiangsu 221116, China

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Figures & Tables(8)

Fig. 1. SPR-PCF sensor. (a) Structure diagram of temperature system; (b) cross section of PCF

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Fig. 2. Relationship between fundamental mode loss peak and different parameters. (a) t₁; (b) t₂; (c) Λ; (d) d₁

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Fig. 3. Relationship between fundamental mode loss peak and temperature under different parameters. (a) t₁; (b) t₂; (c) Λ; (d) d₁

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$Variation of refractive index and loss of fundamental mode, and refractive index of SPP mode with wavelength (Illustration A shows the SPP mode field, and illustration B、C shows mode field of fundamental mode and fundamental mode in coupling time)$

Fig. 4. Variation of refractive index and loss of fundamental mode, and refractive index of SPP mode with wavelength (Illustration A shows the SPP mode field, and illustration B、C shows mode field of fundamental mode and fundamental mode in coupling time)

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Fig. 5. Temperature characteristic curves of the fundamental mode. (a) Fundamental mode loss; (b) loss peak shift of fundamental mode

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Table 1. Influence of different parameters on loss peak, sensitivity, and linearity

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Table 1. Influence of different parameters on loss peak, sensitivity, and linearity

Parameter	Available range	Loss	Spectral shift	Sensitivity	Linearity
t₁ /nm	30--40	Decrease	Red shift	Increase	Decrease
t₂ /μm	1.00--1.20	Increase	Blue shift	Decrease	Decrease
Λ /μm	2.95--3.20	Increase	Blue shift	Decrease	Decrease
d₁ /nm	350--450	Decrease	Blue shift	Decrease	Increase

Table 2. Optimization parameters of SPR-PCF structure
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Table 2. Optimization parameters of SPR-PCF structure
Parameter t₁ /nm t₂ /μm Λ /μm d₁ /nm
Value 40 1.10 3.00 400

Table 3. Characteristic comparison of PCF temperature sensors

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Table 3. Characteristic comparison of PCF temperature sensors

Type	Year	Sensitivity /(nm·℃^-1)	Resolution /℃	Sensitization method
SPR	2015	0.5	0.02	Chloroform & ethanol
SPR	2016	3.08	0.01325	Anhydrous ethanol
Directional coupling	2017	-6.02	0.00332	Toluene
Proposed	2019	-8.18	0.0123	PDMS

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Liu Hai, Bai Bingbing, Zhang Yanzeng, Chen Cong, Shao Qiyuan, Wang Haoran. High-Sensitivity Temperature Measurement Based on SPR in Gold-PDMS-Coated Photonic Crystal Fiber[J]. Chinese Journal of Lasers, 2020, 47(4): 404003

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