A surface plasmon resonance haemoglobin concentration sensor based on D‐type optical fibre with a graphene‐gold surface architecture

In this study, a surface plasmon resonance sensor for detecting haemoglobin concentration based on D-type optical fibre with graphene-gold architecture is proposed. The included 50 nm thick gold film and monolayer graphene film, which were decorated 10 mm long sensing region. proposed worked in wavelength interrogation mode, the light ranging from 400 to 1100 nm. authors realised polishing process, vacuum coating chemical-vapour-deposited graphene's wet transfer process. Furthermore, fabricated sensors used detect refractive index (RI) of samples, varied 1.331 1.346. Experiment results show that fitted RI sensitivity reaches 1874.41 nm/RIU, 4.995% higher than only gold. coated 4.96 nm/(g/dL), can provide resolution 20.2 mg/dL detection.