title: UV-exposed Bragg gratings for laser applications in silver-sodium ion-exchanged phosphate glass waveguides.
abstract: High reflectivity Bragg gratings have been written by ArF excimer laser through a phase mask into IOG-1 hybrid phosphate glass. After grating exposure, a waveguide was fabricated by silver-sodium ion-exchange. Reflectivities around 80% at a wavelength of ~ 1535 nm were measured from the waveguide for both quasi-TE and -TM polarizations. Waveguide laser operation with the photowritten waveguide grating as another mirror was demonstrated. Output power of 3.8 mW with a pump power of 199 mW could be extracted from the laser configuration.
authors.forename: Sanna
authors.initials: S
authors.lastname: Yliniemi
authors.forename: Jacques
authors.initials: J
authors.lastname: Albert
authors.forename: Qing
authors.initials: Q
authors.lastname: Wang
authors.forename: Seppo
authors.initials: S
authors.lastname: Honkanen