Research on the performance of a novel SPR sensor based on graded index multimode fiber
ISSN: 0260-2288
Article publication date: 30 November 2018
Issue publication date: 17 May 2019
Abstract
Purpose
This paper aims to propose and demonstrate a novel surface plasmon resonance (SPR)-sensing approach by using the fundamental mode beam based on a graded index multimode fiber (GIF). The proposed SPR sensor has high sensitivity and controllable working dynamic range, which expects to solve the two bottlenecks of fiber SPR sensor, including low sensitivity and the difficulty in multichannel detection.
Design/methodology/approach
The low-order mode of the GIF to SPR sense, which keeps the sensitivity advantage of the single-mode fiber SPR sensor, is used. By using this new SPR sensor, the effect of light incident angle and gold film thickness on working dynamic range was studied. According to the study results, the smaller is the incident angle, the larger is the SPR working dynamic range and the longer is the resonance wavelength with a fixed gold film thickness; the larger is the gold film thickness, the longer is the resonance wavelength with a fixed grinding angle. After the parameter optimization, the sensitivity of these two parameter-adjusting methods reach 4,442 and 3031 nm/RIU.
Originality/value
When the grinding angle of the GIF increases, the dynamic range of the resonance wavelength increases and has a redshift, sensitivity increases, and the resonance valley becomes more unobvious with a fixed gold film thickness. Similarly, when gold film thickness increases, the dynamic range of the resonance wavelength increases and has a redshift, sensitivity increases, and the resonance valley becomes more unobvious with a fixed grinding angle. These adjusting performance aforementioned lay the foundation for solving of the fiber-based SPR multichannel detection and increasing of the fiber-based SPR sensor sensitivity, which has a good application value.
Keywords
Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 61705025, 61307104, 61405044) and partially supported by the following grants: Project Supported by Program for Innovation Team Building at Institutions of Higher Education in Chongqing (CXTDX201601034), Chongqing Municipal Key Laboratory of Institutions of Higher Education (Grant No. C16), Science and Technology Project Affiliated to the Education Department of Chongqing Municipality (No. KJ1710238, KJ1710247, KJ1725391, KJ131125), Fundamental Research Funds for Chongqing Three Gorges University of China (No. 16PY13, 16QN16) and Specialized Research Fund for the Doctoral Program of Higher Education (No. 20132304120024).
Citation
Liu, C., Wei, Y., Su, Y., Liu, H., Zhang, Y. and Nie, X. (2019), "Research on the performance of a novel SPR sensor based on graded index multimode fiber", Sensor Review, Vol. 39 No. 3, pp. 358-363. https://doi.org/10.1108/SR-04-2018-0094
Publisher
:Emerald Publishing Limited
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