25 February 2008 Photo darkening in ytterbium co-doped silica material
Author Affiliations +
A model description of photo darkening based on 30 characterised fibres in an un-seeded amplifier setup is presented. Photo darkening of ytterbium / aluminium and/or phosphorous co-doped silica fibres is found to saturate following prolonged exposure to pump radiation. The photo darkening is associated with non-binding oxygen at surfaces of ytterbium / aluminium clusters. The dominant colour centre at near infrared wavelengths in MCVD material is a combination of 1.9 eV (FWHM of 0.62 eV) and 2.4 eV (FWHM of 0.85 eV) absorption dependent on average phonon energy of the glass material.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kent Erik Mattsson, Kent Erik Mattsson, Stig Nissen Knudsen, Stig Nissen Knudsen, Benoit Cadier, Benoit Cadier, Thierry Robin, Thierry Robin, } "Photo darkening in ytterbium co-doped silica material", Proc. SPIE 6873, Fiber Lasers V: Technology, Systems, and Applications, 68731C (25 February 2008); doi: 10.1117/12.763117; https://doi.org/10.1117/12.763117


Back to Top