Thermal Stability of Bragg Gratings Written in N-Doped- Silica-Core Fibers (original) (raw)

AbstTact: The results of thermal tests of high-temperature Bragg gratings written in a nitrogen-doped-silica-core fiber are preented. The gratings were produced by the conventional teaique using an ArF excimer laser and a phase mask at various exposure regime: show that they can withstand heating up to 900•‹C. The possible physical mechanisms responsible for thermal decay of the gratings are analyzed. Based on these results, the grating written in this type of fibers is potential to be integrated in fiber sensor system, in order to develop a high temperature sensor.