27 July 1994 Co-doped spinels: promising materials for solid state lasers
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Optical absorption, luminescence, saturation of absorption and lifetime measurements have been carried out on Co-doped MgAl2O4 and ZnGa2O4. The crystal field parameters are estimated for the tetrahedral Co2+ ion. Three luminescence bands observed in the visible and near infrared are assigned to transitions from the 4T1(4P) level to the lower levels 4A2(4F), 4T2(4F), and 4T1(4F), respectively. Strong luminescence quenching due to nonradiative decay processes is observed MgAl2O4:Co. Saturation of Co2+ absorption at 540 nm is measured and the absorption cross section is estimated to be 2.1 + 0.2 X 10-19 cm2 in MgAl2O4.
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Nickolai V. Kuleshov, Nickolai V. Kuleshov, Victor P. Mikhailov, Victor P. Mikhailov, V. G. Scherbitsky, V. G. Scherbitsky, } "Co-doped spinels: promising materials for solid state lasers", Proc. SPIE 2138, Longer Wavelength Lasers and Applications, (27 July 1994); doi: 10.1117/12.181357; https://doi.org/10.1117/12.181357

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