Abstract
This paper reports on the refined Sellmeier and thermo-optic dispersion formulas for BaGa4Se7 that provide a good reproduction of the temperature-dependent phase-matching conditions for type-2 difference-frequency generation between the signal and idler outputs of a Nd:YAG laser-pumped KTiOPO4 optical parametric oscillator in the 8.457–9.092 µm and 12.075–14.201 µm spectral ranges at 20–150°C and recent experiments within these wavelength and temperature ranges performed by other authors.
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