Nd -> Yb energy transfer in (Nd, Yb):Y2O3 transparent ceramics

作者：Lupei A^*; Lupei V; Ikesue A; Gheorghe C; Hau S

来源：Optical Materials, 2010, 32(10): 1333-1336.

DOI：10.1016/j.optmat.2010.04.017

• Laser ceramics
• Y2O3
• Nd
• Yb
• Nd-Yb

In the attempt to obtain new efficient laser systems, the Nd -> Yb energy transfer characteristics in Y2O3 transparent ceramics were investigated. The spectral characteristics that assure the efficient resonant Nd3+ -> Yb3+ energy transfer are presented, especially the overlap integral of the Nd3+ F-4(3/2) -> I-4(9/2) emission with the Yb3+ F-2(7/2) -> F-2(5/2) absorption in (Nd, Yb):Y2O3. The static spectral data reveal that the Nd3+ -> Yb3+ energy transfer shows: a strong dependence on Yb3+ content (less on Nd3+), a small variation with temperature and the implication of both Yb3+ sites in transfer, though only Nd3+ in C-2 are active. From the analysis of Nd3+ F-4(3/2) emission decays in double doped samples it is concluded that the Nd -> Yb transfer for Nd similar to 1 at.% is of direct type, through the dipole-dipole interaction with global energy transfer microparameter similar to C-DA,C-Nd-Yb approximate to 1 x 10(-38) cm(6) s(-1) and transfer efficiencies up to 98% for rather low (similar to 5 at.%) Yb3+ content.

• 出版日期2010-8