Plasmonic tilted fiber Bragg grating sensors: insights into their effective demodulation

Plasmonic tilted fiber Bragg gratings serve as highly sensitive refractometers and biosensors. This study compares four demodulation methods, highlighting a filtering-based approach that improves linearity and simplifies spectral interpretation. The method is validated through the detection of clinically relevant concentrations of C-reactive proteins, showcasing its potential for biomedical and environmental applications.