Compact system 1 Fluid dynamics 1 Grating 1 Grating coupling 1 Incident light 1 Lenses 1 Measurement techniques 1 Optical detection 1 Optical sensing 1 Point of care 1 Refractive index 1 Resonance measurement 1 SPECTRA 1 Spectra's 1 Surface plasmon resonance 1 Surface-plasmon resonance 1 compact system gratings 1 optical sensing 1 surface plasmon resonance 1