Abstract
A detailed experimental study of dispersion and anisotropy of thermo-optic coefficients and thermal coefficients of the optical path is performed for tetragonal and laser host crystals by a laser beam deviation method. It is supported by theoretical description of thermo-optic effects, taking into account the volumetric thermal expansion effect and the temperature dependence of electronic bandgap . Linear thermal expansion coefficients were also determined by a dilatometric technique. Thermo-optic dispersion formulas describing temperature variation of the refractive index and the thermal lens effect are derived for a wide spectral range of 0.4–2 μm. It allows us to estimate the values of and for the studied crystals. The influence of materials parameters and pumping conditions on thermal lens properties is discussed, revealing the significant impact of anisotropic and temperature-dependent thermal conductivity.
© 2013 Optical Society of America
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P. A. Loiko, K. V. Yumashev, V. N. Matrosov, and N. V. Kuleshov, "Dispersion and anisotropy of thermo-optic coefficients in tetragonal GdVO4 and YVO4 laser host crystals: erratum," Appl. Opt. 54, 4820-4822 (2015)https://opg.optica.org/ao/abstract.cfm?uri=ao-54-15-4820
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