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Proceedings Paper

Er3+- and Yb3+- doped phosphate glasses for eye-safe laser systems
Author(s): Ryszard Stepien; Kazimierz P. Jedrzejewski; Miroslaw Kwasny; Zygmunt Mierczyk
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Paper Abstract

Erbium doped optical glasses are effective media for active lasers generating eye safe radiation of a wavelength 1.53 divided by 1.55 micrometers . Development of erbium glass laser systems requires investigations aimed at improvement in glass properties and increase in effectiveness of laser radiation generation. Phosphate glass samples with various Cr2O3, Yb2O3 and Er2O3 contents based upon P2O5-Al2O3-BaO-PbO- K2O oxide system were prepared. The obtained phosphate glasses are characterized by advantageously low thermal expansion coefficient what is important for increase of glass resistance to thermal shock, especially when they are applied as rods for lamp pumped lasers. The effect of changing concentrations of Er3+ and sensitizes Cr3+, Yb3+ as well as glass base compositions on luminescence properties were investigated. The spectral and spectroscopic properties were measured for these glasses. Absorption spectra of these Er3+, Yb3+ and Cr3+-doped glasses were measured in spectral range 190 nm divided by 25 micrometers at room temperature. The excitation and luminescence spectra were also recorded at room temperature on a spectro fluorometer using a diode laser as an excitation source. The presence of hydroxyl groups is an important factor influencing glass structure. In glasses having high concentration of hydroxyl ions, strong attenuation of a lifetime of excited Er3+ ions was stated. In such a case the absorption band around 3.3 micrometers was observed. Concentration of OH groups was reduced due to adequate special melting process of glass. Carried out investigations on thermal, optical, and spectroscopic properties of the obtained glasses showed their good quality, ensuring possibility of their application in laser systems.

Paper Details

Date Published: 29 October 2001
PDF: 12 pages
Proc. SPIE 4594, Design, Fabrication, and Characterization of Photonic Devices II, (29 October 2001); doi: 10.1117/12.446571
Show Author Affiliations
Ryszard Stepien, Institute of Electronic Materials Technology (Poland)
Kazimierz P. Jedrzejewski, Warsaw Univ. of Technology (Poland)
Miroslaw Kwasny, Military Univ. of Technology (Poland)
Zygmunt Mierczyk, Military Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 4594:
Design, Fabrication, and Characterization of Photonic Devices II

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