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CO - doping effects on SrWO4: Nd3+ crystals for Raman lasers

A. ACHIM1,* , L. GHEORGHE1, V. LUPEI1, A. LUPEI1, C. GHEORGHE1, C. STOICESCU1

Affiliation

  1. National Institute for Laser, Plasma and Radiation Physics, Solid State Quantum Electronics Laboratory, 077125, Bucharest, Romania

Abstract

The strontium tungstate (SrWO4) crystals doped with laser active RE3+ (rare earths) ions can act as multifunctional systems, combining the laser and Raman scattering properties. To bring some insight in the charge compesation mechanisms connected with substitution of the Sr2+ host cations with RE3+, the high-resolution optical spectra at low temperatures on Nd: SrWO4 single doped crystals and co-doped with Nb5+ or Na+ ions were performed. The crystal growth conditions and structural results are presented too. The high-resolution optical absorption data at 15 K reveal a multicenter structure (up to five centers). A comparative analysis of the Nd3+ spectra in single doped or in (Nd, Na) and (Nd, Nb) co-doped SrWO4 crystals is presented..

Keywords

Tungstates, SrWO4 crystals, Czochralski, X-ray diffraction, Nd3+ spectroscopy.

Submitted at: March 26, 2008
Accepted at: June 9, 2008

Citation

A. ACHIM, L. GHEORGHE, V. LUPEI, A. LUPEI, C. GHEORGHE, C. STOICESCU, CO - doping effects on SrWO4: Nd3+ crystals for Raman lasers, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 6, pp. 1353-1356 (2008)