Anisotropy of nonlinear absorption in Co2+:MgAl2O4 crystal

Anisotropy of the nonlinear absorption of Co2+ ions in MgAl2O4 single crystal at the wavelengths of 1.35 and 1.54 Delta *mm 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 d...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2007-08, Vol.88 (3), p.443-447
Main Authors: VOLK, Y. V, MALYAREVICH, A. M, YUMASHEV, K. V, MATROSOV, V. N, MATROSOVA, T. A, KUPCHENKO, M. I
Format: Article
Language:English
Subjects:
Anisotropy
Cross sections
Crystals
Dipoles
Doped-insulator lasers and other solid state lasers
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lasers
Mathematical models
Nonlinear optical crystals
Nonlinearity
Optical materials
Optics
Physics
Wavelengths
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Summary:Anisotropy of the nonlinear absorption of Co2+ ions in MgAl2O4 single crystal at the wavelengths of 1.35 and 1.54 Delta *mm 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 Delta *mm are evaluated to be Delta *sgsa=(4.0?0.3)X10-19, Delta *sesa=(3.6?0.4)X10-20 cm2 and Delta *sgsa=(5.1?0.3)X10-19, Delta *sesa=(4.6?0.4)X10-20 cm2, respectively.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-007-2716-5