Materials other than silica can offer better performance in terms of Er solubility and band broadness for integrated Er-doped optical amplifiers and a deep knowledge of their optical properties is therefore fundamental. In this work we describe a simple approach for evaluating upconversion with low pump power excitation, when the standard methods are not very accurate. This is based on the solution of an analytic model which allows the calculation of the 1540nm (I-13/2 --> I-15/2) and the 980nm (I-11/2 --> I-15/2) photoluminescence emissions by considering three energy levels for Erbium.The proposed model has been applied to analyze the luminescence properties of an Er-doped aluminosilicate glass. Firstly some of the system parameters have been evaluated in relation with the lifetimes and with the absorption cross section at 488 nm excitation wavelength. Then the model has been calibrated by comparing the calculated relation between the 980 nm and the 1540 nm emission intensities with the corresponding experimental measurements. This procedure allowed for the determination of the coefficient of cooperative upconversion using pump powers in the range 4-32 mW. An experimental check of the goodness of the method is also presented. (C) 2003 Elsevier B.V. All rights reserved.

A simple approach for upconversion determination using low excitation power: The photoluminescence analysis of an Er-doped aluminosilicate glass

Enrichi, F.
;
2003

Abstract

Materials other than silica can offer better performance in terms of Er solubility and band broadness for integrated Er-doped optical amplifiers and a deep knowledge of their optical properties is therefore fundamental. In this work we describe a simple approach for evaluating upconversion with low pump power excitation, when the standard methods are not very accurate. This is based on the solution of an analytic model which allows the calculation of the 1540nm (I-13/2 --> I-15/2) and the 980nm (I-11/2 --> I-15/2) photoluminescence emissions by considering three energy levels for Erbium.The proposed model has been applied to analyze the luminescence properties of an Er-doped aluminosilicate glass. Firstly some of the system parameters have been evaluated in relation with the lifetimes and with the absorption cross section at 488 nm excitation wavelength. Then the model has been calibrated by comparing the calculated relation between the 980 nm and the 1540 nm emission intensities with the corresponding experimental measurements. This procedure allowed for the determination of the coefficient of cooperative upconversion using pump powers in the range 4-32 mW. An experimental check of the goodness of the method is also presented. (C) 2003 Elsevier B.V. All rights reserved.
erbium
upconversion
modeling
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11562/1064641
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