Title :
Shifts in resonance wavelengths of Bragg gratings during writing or bleaching experiments by UV illumination within germanosilicate optical fibre
Author :
Fertein, Eric ; Legoubin, S. ; Douay, Marc ; Canon, S. ; Bernage, P. ; Niay, P. ; Bayon, F. ; Georges, T.
Author_Institution :
Lab. de Spectroscopie Moleculaire, Univ. de Lille Flandres Artois, Villeneuve d´Ascq, France
Abstract :
The resonance wavelengths of Bragg gratings are shown to increase with irradiation time during their inscription if the core of a germanosilicate fibre is exposed to a 243 nm UV fringe pattern. Exposure of the gratings to a 243 nm UV monotonic illumination leads to a recovery in the transmittance of the filters. Whether this irradiation induces a shift, or not, in the Bragg wavelength of the filters depends on the history of the grating writing experiment.
Keywords :
germanium compounds; holographic gratings; optical fibres; radiation effects; silicon compounds; spectral line shift; 243 nm; Bragg gratings; SiO 2:GeO 2 fibre; UV fringe pattern; UV illumination; bleaching; filters; germanosilicate optical fibre; resonance wavelength shifts; transverse holographic method; writing;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19911142