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Journal of Crystal Growth, Vol.532, 2020
Influence of Yb3+ concentration on KYbxY1-x(WO4)(2) laser crystals
KYbxY1-x(WO4)(2) (KYbxY1-xW, x = 0.05-0.20) crystals were successfully grown by the top seeded solution growth method (TSSG) with K2W2O7 as flux. The KYbxY1-xW crystals maintain monoclinic structure, and the crystal unit cell volume decreases as the Yb3+ ions doping concentration increases. The emission cross-sections (sigma(em) in KYbxY1-xW(x = 0.05-0.20) crystals are 0.805 x 10(-)(20) cm(2), 0.599 x 10(-)(20) cm(2), 1.147 x 10(-)(20) cm(2) and 1.008 x 10(-)(20) cm(2) at 980 nm. A direct continuous-wave diode pumped KYb0.05Y0.95 W laser crystal could generate an output power of 1.31 W with slope efficiency of 44.8% by using an output coupler with a transmission T = 1%.