Comparative analyses of different interrogation techniques of an interferometric fiber optic SPR sensor

Duo Yi; Zhenwei Huo; Liang Zhang; Yuzhi Chen; Youfu Geng; Xuejin Li

doi:10.1117/12.2573463

10 October 2020 Comparative analyses of different interrogation techniques of an interferometric fiber optic SPR sensor

Duo Yi, Zhenwei Huo, Liang Zhang, Yuzhi Chen, Youfu Geng, Xuejin Li

Proceedings Volume 11554, Advanced Sensor Systems and Applications X; 115540V (2020) https://doi.org/10.1117/12.2573463
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

This study mainly compares two optimized interrogation techniques for an interferometric fiber-optic surface plasmon resonance (SPR) sensor. For this sensor, both SPR and interference effects are excited in a single fiber structure and they can be applied for dual-parameter measurement. On the other hand, the interference fringe patterns are mixed into the SPR transmission spectra, and the novel interrogation technique should be evaluated. In this study, two optimized interrogation techniques are proposed and their performances are compared. For the first one, the non-linear least square method is used to filter out the interference components and only retain the SPR signal. For the second one, the wavelength-distributed spectra are converted into the spatial frequency-distributed spectra, hence SPR components and the interference components can be discussed individually. The advantages and disadvantages of the two interrogation techniques are discussed thoroughly.

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Citation Download Citation

Duo Yi, Zhenwei Huo, Liang Zhang, Yuzhi Chen, Youfu Geng, and Xuejin Li "Comparative analyses of different interrogation techniques of an interferometric fiber optic SPR sensor", Proc. SPIE 11554, Advanced Sensor Systems and Applications X, 115540V (10 October 2020); https://doi.org/10.1117/12.2573463

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