Surface plasmon resonance sensor using an optical fiber with an inverted graded-index profile.
A new optical fiber sensor based on surface plasmon resonance is described. It uses an optical fiber with an inverted graded-index profile. A theoretical analysis of the optical propagation when a point light source was used and a computation of the optical power transmitted by the fiber were performed. Experiments were carried out to measure changes of the transmitted power caused by refractive-index variations of the surrounding dielectric medium. Both the simulation and experiments have shown that the sensor exhibits high sensitivity for changes of the surrounding medium in a refractive index range from 1.33 to 1.39.
Bardin
Fabrice
F
Laboratoire Traitement du Signal et Instrumentation, Centre National de la Recherche Scientifique, Saint-Etienne, France.
Ivan
Kasík
K
Trouillet
Alain
A
Matejec
Vlastimil
V
Gagnaire
Henri
H
Chomát
Mirek
M