title: Structural modification in fused silica by a femtosecond fiber laser at 1558 nm.
abstract: We report on structural modification in fused silica by a novel commercial femtosecond fiber laser with a fundamental wavelength of 1558 nm. The refractive-index change was induced by laser pulses at a repetition rate of 173 kHz and pulse duration of 870 fs. The refractive index change with a magnitude of 1.2 x 10(-3) was estimated from the diffraction efficiencies of an internal grating.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Tamaki
authors.forename: Wataru
authors.initials: W
authors.lastname: Watanabe
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nagai
authors.forename: Makoto
authors.initials: M
authors.lastname: Yoshida
authors.forename: Junji
authors.initials: J
authors.lastname: Nishii
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Itoh