Characterizations at high temperatures of long-period gratings written in germanium-free air-silica microstructure fiber.
We report what is to our knowledge the first characterization at high temperatures of long-period fiber gratings written in Ge-free air-silica microstructure fiber. The gratings written with the electric-arc technique suffer a low shift of the resonance wavelengths when the temperature is increased from 20 degrees C to 1200 degrees C. This shift is studied and compared with that of a long-period fiber grating written in a standard single-mode fiber by the same technique. Good thermal stability of the grating and of the fiber after annealing at 1200 degrees C for 1 h is demonstrated.
Humbert
Georges
G
Groupe d'Optique et d'Optronique, Complexe de Recherche Interprofessionnel en Aérothermochimie Unité Mixte de Recherche 6614, Université de Rouen, Avenue de l'Université, B.P. 12, 76801 Saint Etienne du Rouvray Cedex, France.
Malki
Abdelrafik
A
Février
Sébastien
S
Roy
Philippe
P
Pagnoux
Dominique
D