Growth and spectroscopic properties of ytterbium-doped lanthanum calcium borate (Yb~(3+):La_(2)CaB_(10)O_(19)) crystal

摘要

A new ytterbium-doped lanthanum calcium borate crystal (Yb~(3+):La_(2)CaB_(10)O_(19), Yb:LCB) has been grown by the flux method. The spectroscopic properties have been investigated and the fundamental spectral parameters for Yb:LCB crystal have been calculated. Yb:LCB crystal has the strongest absorption at 976 nm with a full-width at half-maximum of 14 nm. The absorption and emission cross-sections are 1.16×10~(-20) and 3.51×10~(-20) cm~(2), respectively. The fluorescence lifetime is 0.95 ms. The ground-state energy level splitting is calculated to be 640 cm~(-1). In comparison with other Yb-doped laser crystals, the calculated parameters show that Yb:LCB crystal satisfies the fundamental spectral condition for laser emission.