Spectroscopy and gain in Al2O3:Er waveguides

L. Agazzi, J. Bradley, F. Ay, K. Worhoff, M. Pollnau

    Research output: Contribution to conferencePaper

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    Abstract

    The spectroscopic properties of the $Al_2O_3:Er$ layers were investigated by lifetime measurements. Typical Bernoulli-type decay curves were found, with an increasingly fast non-exponential initial component for higher Er concentrations, which results from enery-transfer upconversion between neighbouring Er ions. The exponential tail at long decay times exhibits an asymptotic lifetime which decreases from 7ms for Er concentrations of ~2x$10^{19} cm^{-3}$ down to 2 ms for Er concentrations of ~4x$10^{20} cm^{-3}$. This behavior may result from either pair-induced energy-transfer upconversion or quenching by impurity ions present in the metallic Er target used for sputtering. We conclude that at least two different types of quenching mechanisms are present in the decay.
    Original languageEnglish
    Number of pages1
    Publication statusPublished - Jul 2008
    EventInternational Conference on Luminescence and Optical Spectroscopy of Condensed Matter 2008 - Lyon, France
    Duration: 7 Jul 200811 Jul 2008

    Conference

    ConferenceInternational Conference on Luminescence and Optical Spectroscopy of Condensed Matter 2008
    CountryFrance
    CityLyon
    Period7/07/0811/07/08

    Keywords

    • IOMS-APD: Active Photonic Devices

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    Agazzi, L., Bradley, J., Ay, F., Worhoff, K., & Pollnau, M. (2008). Spectroscopy and gain in Al2O3:Er waveguides. Paper presented at International Conference on Luminescence and Optical Spectroscopy of Condensed Matter 2008, Lyon, France.