Fiber optic sensors 35 Gold nanoparticles 12 Metal nanoparticles 12 Fiber Bragg gratings 7 Fibers 6 Optical fibers 6 Fiber Bragg Grating Sensors 5 Gold Nanoparticles 5 Gold nanoparticle 5 Plastic optical fibers 5 Temperature measurement 5 Diagnosis 4 Fiber optics 4 Fibre-optic sensor 4 Interferometers 4 Optical fiber fabrication 4 Refractive index 4 Signal to noise ratio 4 Technology: general issues 4 Waveguides 4 Electric sensing devices 3 Graphene 3 High sensitivity 3 History of engineering and technology 3 Optical signal processing 3 Research and information: general 3 Scanning electron microscopy 3 Synthesis (chemical) 3 Temperature sensors 3 Time domain analysis 3