title: Free carrier accumulation during direct laser writing in chalcogenide glass by light filamentation.
abstract: We present direct laser writing of channels in chalcogenide glass under light filamentation conditions. Because of the intrinsic properties of the filament, the positive refractive index profile of the channels exhibits a cylindrical symmetry of high quality. The role of the repetition rate is also investigated. It is shown that if the time separation between pulses is shorter than the lifetime of the plasma, the free carriers accumulate and induce a larger variation of the refractive index.
authors: Laboratoire de Physico Chimie de l’Atmosphere, EA CNRS 4493, Universite du Littoral Cote d’Opale, 59140 Dunkerque, France.
authors: Ophélie
authors: O
authors: Caulier
authors: David
authors: D
authors: Le Coq
authors: Laurent
authors: L
authors: Calvez
authors: Eugène
authors: E
authors: Bychkov
authors: Pascal
authors: P
authors: Masselin