Optical fiber refractometers based on lossy mode resonances supported by TiO2 coatings.
We obtain lossy mode resonances by the coupling of light from a multimode optical waveguide to a TiO(2)/PSS coating deposited with the layer-by-layer method. The resonances can be generated in a wide wavelength range from the ultraviolet to the infrared region of the optical spectrum. The transmission spectrum is monitored as a function of the number of bilayers deposited, and the experimental results agree with the theoretical predictions. Moreover, each of the resonances owns a particular sensitivity to the external refractive index. This permits us to use the sensor as a refractometer with multiple-wavelength monitorization.
Hernáez
Miguel
M
Departamento de Ingeniería Eléctrica y Electrónica, Universidad Pública de Navarra, 31006 Pamplona, Spain. miguel.hernaez@unavarra.es
Del Villar
Ignacio
I
Zamarreño
Carlos R
CR
Arregui
Francisco J
FJ
Matias
Ignacio R
IR