Up-Conversion Luminescence Properties of Nd3+/Yb3+ Doped Lutetium-Based Oxyfluoride Glass Ceramic

Nd[Formula: see text]/Yb[Formula: see text] co-doped lutetium-based glass sample and glass ceramic sample were prepared with the molar ratios of 52SiO 2 -8Na 2 CO 3 -16Al 2 O 3 -33NaF-3LuF 3 -0.15Yb 2 O 3 -0.03Nd 2 O 3 by the high temperature melting method in 1400 ∘ C. Under the excitation of 980[Formula: see text]nm diode laser, up-conversion luminescence spectrum of glass sample and glass ceramic sample was measured and three stronger up-conversion luminescence peaks at the wavelength of 552[Formula: see text]nm, 656[Formula: see text]nm and 668[Formula: see text]nm were observed, and up-conversion luminescence strengths of glass ceramic sample are higher than those of glass sample. The two-photon absorption of three emission peaks was determined by the fitting curve graph of up-conversion emission power and LD wording current. Absorption spectrum of glass ceramic sample was obtained and spectral strength parameters were computed as [Formula: see text][Formula: see text]cm 2 , [Formula: see text][Formula: see text]cm 2 , [Formula: see text][Formula: see text]cm 2 by adopting Judd–Ofelt theory, and the root mean square deviation between the theoretical oscillator strength and the experimental oscillator strength were calculated as [Formula: see text]. Transition probability, branching ratio of 4 F[Formula: see text] to its lower level and lifetime of 4 F[Formula: see text] level of Nd[Formula: see text] ions were calculated, and the results indicate that the prepared Nd[Formula: see text]/Yb[Formula: see text] co-doped glass ceramic sample is a kind of good up-conversion material.