title: Nonlinear refractive index of erbium-doped Y(2)O(3) integrated-optical waveguides.
abstract: Self-induced phase modulation in erbium-doped polycrystalline Y(2)O(3) integrated-optic waveguides is studied by use of a Mach-Zehnder interferometric setup. We determined the wavelength dispersion of the nonlinear refractive index near the (4)F(9/2) absorption band and show that it corresponds qualitatively with a Kramers-Krönig analysis. The nonlinear coefficient at 670 nm was determined to be 1.4 x 10(-14) m(2)/W and has an electronic origin with a slow relaxation time of 6 ms.
authors.forename: T H
authors.initials: TH
authors.lastname: Hoekstra
authors.forename: B J
authors.initials: BJ
authors.lastname: Offrein
authors.forename: P V
authors.initials: PV
authors.lastname: Lambeck
authors.forename: T J
authors.initials: TJ
authors.lastname: Popma