title: Investigation of the writing mechanism of electric-arc-induced long-period fiber gratings.
abstract: The mechanism for inscription of electric-arc-induced long-period gratings in SMF28 fiber was studied. The refractive-index profiles of irradiated fiber samples were measured, and their structures were investigated by Raman and luminescence spectroscopy. Slight geometrical deformations of the irradiated fiber were measured. A significant change in the Raman spectrum range from 200 to 700 cm(-1) caused by the electric arc is reported. The results show a decrease in the intensity of this band, indicating a modification, such as densification, of the glass structure. No modification of the fictive temperature was measured. A large increase in the red luminescence band was also observed and attests to the creation of defects in the fiber network structure.
authors.affiliation: Laboratoire d'Electronique Micro-technologies et Instrumentation, Institut Universitaire de Technologie de Rouen, Rue Lavoisier 76821, Mont Saint Aignan, France. abdelrafik.malki@univ-rouen.fr
authors.forename: Abdelrafik
authors.initials: A
authors.lastname: Malki
authors.forename: Georges
authors.initials: G
authors.lastname: Humbert
authors.forename: Youcef
authors.initials: Y
authors.lastname: Ouerdane
authors.forename: Aziz
authors.initials: A
authors.lastname: Boukhenter
authors.forename: Azzedine
authors.initials: A
authors.lastname: Boudrioua