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23 February 2000 Upconversion violet emission in diluted Er:YAG crystals
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Proceedings Volume 4068, SIOEL '99: Sixth Symposium on Optoelectronics; (2000)
Event: SIOEL: Sixth Symposium of Optoelectronics, 1999, Bucharest, Romania
In this paper we discuss the upconversion processes responsible for violet luminescence from the Erbium levels 2P3/2 and 2H29/2 in diluted Er:YAG crystals, excited with pulsed as well with cw lasers. Besides the general need for new spectroscopic data concerning laser materials, the interest for this study is generated by the fact that energy levels of very different quantum efficiencies can produce, function of the pumping conditions, fluorescence spectra of comparable intensities or even with reversed intensity ratio.
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Serban Georgescu, Voicu Lupei, A. Petraru, Claudiu Hapenciuc, Cristian Florea, C. Naud, and C. Porte "Upconversion violet emission in diluted Er:YAG crystals", Proc. SPIE 4068, SIOEL '99: Sixth Symposium on Optoelectronics, (23 February 2000);

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