Technique of CeF3 impurity concentration control in LaF3 crystals by means of the UV absorption spectra

Elena A. Krivandina; Zinaida I. Zhmurova; Tatiana M. Glushkova; Dmitrii F. Kiselev; Marina M. Firsova; Antonina P. Shtyrkova

doi:10.1117/12.418851

15 March 2001 Technique of CeF₃ impurity concentration control in LaF₃ crystals by means of the UV absorption spectra

Elena A. Krivandina, Zinaida I. Zhmurova, Tatiana M. Glushkova, Dmitrii F. Kiselev, Marina M. Firsova, Antonina P. Shtyrkova

Author Affiliations +

Proceedings Volume 4358, Optics of Crystals; (2001) https://doi.org/10.1117/12.418851
Event: Optics of Crystals, 2000, Mozyr, Belarus

Abstract

The presence of impurities in the crystals has an important influence on their properties. A sensitive method of the impurity control in the crystals without their destruction is the investigation of their absorption spectra. In this work we have studied the LaF₃ tysonite crystals widely used as the laser matrices. The LaF₃ crystals were grown from the melt by Bridgman-Stockbarger method using the reagents with trade mark high pure and chemical pure. The crystal absorption spectra were recorded in the range of 200-300 nm and the obtained results have shown that the crystals grown from the high pure reagents had no absorption bands in the UV region and the crystals grown from the chemical pure reagents had well defined characteristic absorption bands at (lambda) = 205, 218, 235, 248 nm. Spectral experiments have confirmed the assumption that the UV-absorption bands in the latter crystal samples were caused by the presence of CeF₃ impurity in the chemical pure reagents. A technique was developed for evaluation of CeF₃ content in LaF₃ crystals and in chemical pure mixture of LaF₃ with the accuracy +/- 0.0005 mol.%.

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Elena A. Krivandina, Zinaida I. Zhmurova, Tatiana M. Glushkova, Dmitrii F. Kiselev, Marina M. Firsova, and Antonina P. Shtyrkova "Technique of CeF₃ impurity concentration control in LaF₃ crystals by means of the UV absorption spectra", Proc. SPIE 4358, Optics of Crystals, (15 March 2001); https://doi.org/10.1117/12.418851

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