Title :
Study of the photosensitivity at 193 nm and comparison with photosensitivity at 240 nm. Influence of fibre tension. Type IIA. Ageing
Author :
Riant, L. ; Haller, F. ; Sansonetti, P.
Author_Institution :
Alcatel Alsthom Recherche, Marcoussis, France
Abstract :
Irradiation at 193 nm is very attractive because it allows the photoimprinting of Bragg gratings in non-hydrogenated low germanium content fibres, with very high index modulation, approaching 10-3 . We present here a study on photosensitivity and ageing characteristics in germanosilicate fibres at 193 nm and make comparison with those obtained at 240 nm, leading to new insights on the different types of gratings
Keywords :
diffraction gratings; 193 nm; 240 nm; Bragg fibre gratings; GeO2-SiO2; Type IIA gratings; UV irradiation; ageing characteristics; annealing; fibre tension influence; germanosilicate fibres; phase mask technique; photoimprinting; photoinduced index change; photosensitivity; thermal stability; very high index modulation;
Conference_Titel :
Optical Fibre Gratings (Digest No. 1997/037), IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19970237
