OPTICAL-ABSORPTION AND LUMINESCENCE OF TM3-DOPED LINBO3 AND LINBO3(MGO) CRYSTALS()

The optical properties (absorption, luminescence and lifetime) of Tm3-doped LiNbO3 and LiNbO3(MgO) have been measured. It has been found th at the D-1(2), (1)G(4), H-3(4) and F-3(4) levels decay radiatively hav ing temperature-independent lifetimes. These results are compared with the radiative transition rates calculated by using the Judd-Ofelt the ory. It has also been found that MgO-codoping affects very slightly th e optical properties of Tm3+ ions, except for a general broadening of the spectra. Oscillator strengths and Judd-Ofelt parameters are not af fected by MgO codoping.