title: Refractive index-modified structures in glass written by 266nm fs laser pulses.
abstract: We demonstrate the inscription of embedded waveguides, anti-waveguides and Bragg gratings by use of intense femtosecond (fs) UV laser pulses at 266nm in pure fused silica, and for the first time, in bulk fused quartz and ZBLAN glasses. The magnitude of induced index changes, depends, besides pulse energy and translation speed, largely on writing depth and varies from ~10(-4) for smooth modifications to ~10(-3) for damaged structures. The obtained results are promising as they present the feasibility of fabrication of short (< 0.2μm) period first-order fiber Bragg gratings (FBGs) for applications such as in realization of all-fiber lasers operating at short wavelengths.
authors.affiliation: Centre d’optique, photonique et laser (COPL), Université Laval, Québec, Québec, Canada. ali.saliminia.1@ulaval.ca
authors.forename: Ali
authors.initials: A
authors.lastname: Saliminia
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Bérubé
authors.forename: Réal
authors.initials: R
authors.lastname: Vallée
mesh_terms: D004867:Equipment Design; D005459:Fluorides / Q000737:chemistry; D005857:Germanium / Q000737:chemistry; D005898:Glass / Q000737:chemistry*; D007834:Lasers; D007909:Lenses; D011791:Quartz / Q000737:chemistry; D012031:Refractometry / Q000295:instrumentation / Q000379:methods*; D012822:Silicon Dioxide / Q000737:chemistry; D014466:Ultraviolet Rays
chemical_list: D005857:Germanium; D011791:Quartz; D012822:Silicon Dioxide; D005459:Fluorides