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Proceedings Paper

Cr3+ doped NaAl(WO4)2 crystal as a new broadband laser material
Author(s): V. Nikolov; I. Nikolov; P. Peshev
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Paper Abstract

The growth conditions of single crystals of the new double tungstate of sodium and aluminum, NaAl(WO4)2 have been investigated. Data have been obtained on the concentration and temperature regions of crystallization of this compound in the system Na2O-Al2O3-WO3. Nontsoichiometric high-temperature solutions with very low crystallization temperatures, low viscosity and absence of volatility have been found and used for growing pure and differently Cr3+- doped single crystals of NaAl(WO4)2 by the top seeded solution growth (TSSG) slow cooling. technique. The main defects of the crystals obtained have been established, the reasons for their appearance analysed and single crystals free from inclusions were grown. Measurements of the optical characteristics of samples with chromium concentrations in the range 1.4x 1019-1.3x 1020 atoms/cm3 were carried out. Absorption and luminescence spectra of Cr3+ : NaAl(WO4)2 were obtained at temperatures between 6 and 300 K and the temperature dependence of the Cr3+ luminescence lifetime was established. The Dq/B value found indicates that Cr3+:NaAl(WO4)2 belongs to the intermediate field site crystals. The results show that the new crystal is a good candidate for broadband laser applications.

Paper Details

Date Published: 9 August 2007
PDF: 9 pages
Proc. SPIE 6731, International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems, 67311Q (9 August 2007); doi: 10.1117/12.752939
Show Author Affiliations
V. Nikolov, Institute of General and Inorganic Chemistry (Bulgaria)
I. Nikolov, Institute of General and Inorganic Chemistry (Bulgaria)
P. Peshev, Institute of General and Inorganic Chemistry (Bulgaria)


Published in SPIE Proceedings Vol. 6731:
International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems

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