Upconversion spectroscopy of Al2O3:Er3+

L. Agazzi, Kerstin Worhoff, Markus Pollnau, A. Kahn, M. Fechner, K. Petermann, G. Huber

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    The excitation and relaxation processes relevant for establishing optical gain in Al2O3:Er3+ on the 4I13/2 -> 4I15/2 transition at 1.5 µm are investigated. Excited-state absorption in the wavelength range from 900-1800 nm is measured in a pump-probe experiment. The 4I13/2 and 4I11/2 lifetimes are measured after direct excitation and the macroscopic parameter of the energy-transfer-upconversion (ETU) process (4I13/2, 4I13/2) -> (4I15/2, 4I9/2) is determined independently from both decay curves. By use of the Zubenko model the microscopic parameters of ETU and energy migration are derived. It is found that above the Er3+ concentration at which the transition from static to migration-accelerated ETU takes place also the 1.5-µm amplifier gain is diminished by this process.
    Original languageEnglish
    Title of host publicationIV International Workshop on Photonic and Electronic Materials 2010
    Subtitle of host publicationScientific Program and Workshop Abstracts
    Place of PublicationSan Sebastian, Spain
    PublisherDostonia International Physics Center
    Number of pages1
    Publication statusPublished - Jul 2010
    EventIV International Workshop on Photonic and Electronic Materials 2010 - San Sebastian, Spain
    Duration: 5 Jul 20107 Jul 2010


    WorkshopIV International Workshop on Photonic and Electronic Materials 2010
    CitySan Sebastian


    • METIS-276042
    • IOMS-APD: Active Photonic Devices
    • EWI-18090
    • IR-72292

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