= 0 definition) and for light polarized
along the Ng and Nm axes (with dn/dT+n = 0
definition).
Key words: thermooptic coefficients, athermal propagation directions, potassium gadolunium tungstate
2011, Vol.14, No.2, pp.202-206
Thermooptic coefficients dn/dT of anisotropic crystals Nd(3
at.%):KGd(WO4)2 and KGd(WO4)2 were measured by means
of beam deflection method at 632.8 nm, 300 K. It was found that
thermooptic coefficients in KGd(WO4)2 depends only on the
light polarization but not on the light propagation direction and do
not change significantly with crystal doping up to 3 at.%. The
dn/dT values for light polarized along the optical indicatrix axes
Nm, Np and Ng are negative in Nd:KGd(WO4)2 and equal
dnp/dT = -14.8 x 10-6 K-1, dnm/dT = -10.1 x
10-6 K-1 and dng/dT = -16.0 x 10-6 K-1.
Athermal propagation directions were found in Nd:KGd(WO4)2 for
light polarized along the Np and Nm optical indicatrix axes
(with dn/dT+(n-1) = 0 definition) and for light polarized
along the Ng and Nm axes (with dn/dT+n = 0
definition).
Key words:
thermooptic
coefficients, athermal propagation directions, potassium gadolunium
tungstate
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