Abstract
Thermo-optic coefficients dn/dT of anisotropic Nd(3 at.%):KGd(WO4)2, KGd(WO4)2, Nd(0.4 at.%):YVO4 and Nd(0.4 at.%):GdVO4 crystals were measured at 632.8 nm, 300 K by a beam deflection method. For Nd:KGd(WO4)2, the values of dn/dT amount to dn p/dT=−14.8×10−6 K−1, dn m/dT=−10.1×10−6 K−1 and dn g/dT=−16.0×10−6 K−1. For vanadate crystals, dn e/dT=3.1×10−6 K−1, dn o/dT=8.2×10−6 K−1 (for Nd:YVO4) and dn e/dT=4.3×10−6 K−1, dn o/dT=5.5×10−6 K−1 (for Nd:GdVO4). Athermal propagation directions were found in Nd:KGd(WO4)2 for light polarized along the N p and N m optical indicatrix axes (with dn/dT+(n−1)α T=0 definition) and for light polarized along the N g and N m axes (with dn/dT+n α T=0 definition).
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Loiko, P.A., Yumashev, K.V., Kuleshov, N.V. et al. Thermo-optic coefficients of Nd-doped anisotropic KGd(WO4)2, YVO4 and GdVO4 laser crystals. Appl. Phys. B 102, 117–122 (2011). https://doi.org/10.1007/s00340-010-4143-2
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DOI: https://doi.org/10.1007/s00340-010-4143-2