Detection of Solution Refractive Index Variation Based on Optical Fiber Surface Plasmon Resonance

Chen Qianghua; Han Wenyuan; Kong Xiangyue; He Yongxi; Luo Huifu

doi:10.3788/CJL202047.0804003

Chinese Journal of Lasers, Volume. 47, Issue 8, 804003(2020)

Detection of Solution Refractive Index Variation Based on Optical Fiber Surface Plasmon Resonance

Chen Qianghua^1、*, Han Wenyuan¹, Kong Xiangyue¹, He Yongxi², and Luo Huifu²

Author Affiliations

¹School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100041, China

²School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

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Figures & Tables(9)

Fig. 1. Structure diagram of optical fiber SPR sensor

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Fig. 2. Relationship between reflectivity and incident angle. (a) Relationship between reflectivity of p and s components and incident angle; (b) relationship between reflectivity of p component and incident angle at different thicknesses of gold film

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$Relationship of p and s components' relevant parameters. (a) Relationship between phase and incident angle; (b) relationship between phase difference and refractive index$

Fig. 3. Relationship of p and s components' relevant parameters. (a) Relationship between phase and incident angle; (b) relationship between phase difference and refractive index

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Fig. 4. Non-linear system error of optical fiber SPR sensor

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Fig. 5. Schematic of optical fiber SPR sensing system

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Fig. 6. Experimental curve of measurement stability of proposed system

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Fig. 7. Calibration of phase response of glycerine solution

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Table 1. Measured phase difference data
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Table 1. Measured phase difference data
Mass fraction /% Average phasedifference /(°) Standarddeviation /(°)
0 87.612 0.134
0.1 87.611 0.162
0.5 86.472 0.147
1 85.379 0.138
1.5 84.274 0.129
2 83.157 0.132

Table 2. Measurement comparison of refractive index of glycerine solution

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Table 2. Measurement comparison of refractive index of glycerine solution

Massfraction /%	Average phasedifference /(°)	n-1.333		Refractive index error betweentwo methods /10^-5
Massfraction /%	Average phasedifference /(°)		Proposed method	Method in Ref.[22]
1	85.379	0.001366	0.0014	3.4
1.5	84.274	0.002041	0.0021	5.9
2	83.157	0.002724	0.0028	7.6

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Chen Qianghua, Han Wenyuan, Kong Xiangyue, He Yongxi, Luo Huifu. Detection of Solution Refractive Index Variation Based on Optical Fiber Surface Plasmon Resonance[J]. Chinese Journal of Lasers, 2020, 47(8): 804003

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