Research On Growth And Properties Of (Dy, Tb):KYb(WO₄)₂ Laser Crystals

Dysprosium-doped potassium ytterbium tungstate crystal(Dy:KYb(WO₄)₂, abbreviated Dy:KYbW) and Terbium-doped potassium ytterbium tungstate crystal(Tb:KYb(WO₄)₂, abbreviated Tb:KYbW) are two kinds of new solid laser materials which are apply to LD pump. About the Dy:KYbW and Tb:KYbW crystals are not reported now.In this paper, Dy:KYbW and Tb:KYbW crystals are grown by Top Seeded Solvent Growth (TSSG) method, using K₂W₂O₇ as flux. The rational temperature field, the method of material preparation and technological parameters has been designed through further explore of more experiments. X-ray powder diffraction analysis was given to the crystals. Tb:KYbW and Dy:KYbW belong to monoclinic system with space group C2/c. The lattice parameters were calculated. The Infrared spectrum and Raman spectrum of crystals were measured. The vibration modes were analyzed and the existence of WOW and WOOW can be insured. Absorption spectrum of the sample was measured, Dy³⁺ existed two strong peaks at 807nm and 1300nm respectively. And Tb³⁺ existed one strong peak at the 351 nm. The fluoresence spectrum of Dy:KybW was measurd, Dy³⁺ existed two strong peaks at 1348nm and 1751nm. The emission spectrum of Tb:KYbW was measured and the emission wavelength is 520nm.