Nonlinear refractive index of erbium-doped Y2O3 integrated-optical waveguides

T.H. Hoekstra, B.J. Offrein, P.V. Lambeck, Th.J.A. Popma

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    Self-induced phase modulation in erbium-doped polycrystalline Y203 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 4F912 absorption band and show that it corresponds qualitatively with a Kramers-Kronig analysis. The nonlinear coefficient at 670 nm was determined to be 1.4 x 10-1' m2/W and has an electronic origin with a slow relaxation time of 6 ms.
    Original languageEnglish
    Pages (from-to)1718-1720
    Number of pages3
    JournalOptics letters
    Issue number20
    Publication statusPublished - 1993

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