Convolutional Neural Network-Enabled Optical Fiber SPR Sensors for RI Prediction

作者：Xiao-Xiao Liao, Hong Yang, Qiang Wu, Juan Liu, Yingying Hu, Yue Zhang, Weiqing Liu, Yue Fu, Andrew R. Pike, Bin Liu · 发表于：IEEE Sensors Journal · 年份：2025 · DOI：10.1109/jsen.2024.3523272 · 被引用次数：7 · 研究领域：Advanced Fiber Optic Sensors、Analytical Chemistry and Sensors、Advanced MEMS and NEMS Technologies

The advancement of artificial intelligence technology has led to the widespread adoption of deep learning techniques within spectral analysis over recent years. In this study, we introduce an advanced demodulation approach utilizing a one-dimensional convolutional neural network (1D-CNN) for feature extraction and the analysis of spectral signals from surface plasmon resonance (SPR) fiber refractive index sensors featuring a multimode-no-core-multimode (MNM) structure while simultaneously forecasting changes in refractive index due to environmental factors. Through segmentation-based predictive training on spectral signals, our approach achieves an average prediction accuracy exceeding 98%, even at low resolutions. Experimental findings demonstrate superior demodulation performance using our intelligent demodulation technique based on 1D-CNN compared to conventional methods. Furthermore, our method is adaptable across diverse and intricate structures enabling observation of parameter correlations spanning their entire range; thereby enhancing measurement capabilities within SPR sensing systems with significant potential applications.