Journal of Crystal Growth, Vol.293, No.1, 157-161, 2006
Growth, thermal and spectroscopic characterization of Er3+ : NaY(MoO4)(2) crystal
Er3+:NaY(MOO4)(2) crystal with dimensions up to Phi 21 x 42 mm(2) was grown by Czochralski method. Er3+:NaY(MoO4)(2) crystal melts congruently at 1125 degrees C. The hardness of Er3+ :NaY(MoO4)(2) crystal was 314 VDH. The specific heat at 330 K is 0.71 J/g K (72.9 cal/mol K). The thermal expansion coefficients are 2.53 x 10(-5) and 1.52 x 10(-5) K-1 for c- and a-axes, respectively. The spectroscopic properties of Er3+ :NaY(MoO4)(2) crystals were investigated. The intensity parameters Omega(lambda) (lambda = 2,4,6) in Er3+ :NaY(MoO4)(2) crystal are: Omega(lambda) = 17.82 x 10(-20), Omega(4) = 3.277 x 10(-20), Omega(6) = 3.104 x 10(-20) for pi-polarization and Omega(2) = 19.74 x 10(-20), Omega(4) = 2.716 x 10(-20), Omega(6) = 1.769 x 10(-20) for sigma-polarization. The emission cross sections sigma(cm) were calculated to be 0.926 x 10(-20)cm(2) at 1537nm for pi-polarization and 1.107 x 10(-20) cm(2) at 1539nm for sigma-polarization. (c) 2006 Elsevier B.V. All rights reserved.
Keywords:optical microscopy;Czochralski method;growth from melt;molybdate;solid-state laser materials