Spectrum Characteritics of K⁺,Yb³⁺: BaWO₄ Crystals

To increase concentration of Yb³⁺-ions in BaWO₄ crystals, co-doped K⁺-ions method were adopted. Absorption coefficient of K⁺ ( x (K⁺ ) = 0.01 ), Yb³⁺ ( x ( Yb³⁺) = 0.02) : BaWO₄ crystals is a = 0.494 cm^-1 at 977 nm. Fluorescence spectra of Yb³⁺-ions from 960 nm to 1 020 nm, corresponding to transition ²F_5/2→²F_7/2 was investigated. Emission cross section at 1 005 nm is 6. 286 × 10^-20cm², livetime is 0.4 ms. The experimental result shows that K⁺, Yb³⁺: BaWO₄ is a potential laser crystal.