Upconversion spectroscopy of $Al_2O_3:Er^{3+}$


Agazzi, L. and Bradley, J.D.B. and Ay, F. and Kahn, A. and Scheife, H. and Petermann, K. and Huber, G. and Ridder, R.M. de and Wörhoff, K. and Pollnau, M. (2008) Upconversion spectroscopy of $Al_2O_3:Er^{3+}$. In: IEEE/LEOS Benelux Chapter, 13th Annual Symposium, 27-28 Nov. 2008, Enschede, The Netherlands (pp. pp. 51-53).

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Abstract:The spectroscopic properties of $Al_2O_3:Er^{3+}$ thin films have been investigated by lifetime measurements. The luminescence decay curves show an initial non-exponential
component, followed by an exponential tail, whose decay time decreases with increasing $Er^{3+}$ concentration. This behavior can be described with good accuracy by a microscopic treatment that takes into account both energy migration and energytransfer upconversion among $Er^{3+}$ ions. Parameters such as the migration mean time τ$_0$ and the donor-acceptor transfer probability CDA are derived. We show that, in the concentration range of interest for waveguide amplifiers at 1.5 μm, upconversion occurs mostly in the static regime.
Item Type:Conference or Workshop Item
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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