Anisotropy of nonlinear absorption in Co2+:MgAl2O4 crystal |
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| Authors: | Y.V. Volk A.M. Malyarevich K.V. Yumashev V.N. Matrosov T.A. Matrosova M.I. Kupchenko |
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| Affiliation: | (1) Institute for Optical Materials and Technologies, Belarus National Technical University, Bldg. 17, #65 Independence Ave., 220013 Minsk, Belarus;(2) SOLIX Ltd., Minsk, Belarus |
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| Abstract: | Anisotropy of the nonlinear absorption of Co2+ ions in MgAl2O4 single crystal at the wavelengths of 1.35 and 1.54 μm has been experimentally demonstrated. The experimental data are analyzed in the framework of a phenomenological model when the Co2+ ions are described as three sets of linear dipoles oriented along the crystallographic axes. Ground-state and excited state absorption cross-sections at 1.35 and 1.54 μm are evaluated to be σgsa=(4.0±0.3)×10-19, σesa=(3.6±0.4)×10-20 cm2 and σgsa=(5.1±0.3)×10-19, σesa=(4.6±0.4)×10-20 cm2, respectively. PACS 42.55.Rz; 71.20.Be |
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