Er3+- and Yb3+- doped phosphate glasses for eye-safe laser systems

Ryszard Stepien; Kazimierz P. Jedrzejewski; Miroslaw Kwasny; Zygmunt Mierczyk

doi:10.1117/12.446571

29 October 2001 Er³+- and Yb³+- doped phosphate glasses for eye-safe laser systems

Ryszard Stepien, Kazimierz P. Jedrzejewski, Miroslaw Kwasny, Zygmunt Mierczyk

Proceedings Volume 4594, Design, Fabrication, and Characterization of Photonic Devices II; (2001) https://doi.org/10.1117/12.446571
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore

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.

Citation Download Citation

Ryszard Stepien, Kazimierz P. Jedrzejewski, Miroslaw Kwasny, and Zygmunt Mierczyk "Er³+- and Yb³+- doped phosphate glasses for eye-safe laser systems", Proc. SPIE 4594, Design, Fabrication, and Characterization of Photonic Devices II, (29 October 2001); https://doi.org/10.1117/12.446571

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