Dy. Zhang et al., The expressions of the principal thermal refractive index coefficients of 7.5 mol.% Nb : KTiOPO4 crystals, OPT COMMUN, 168(1-4), 1999, pp. 111-115
Based on the autocollimation method results of the principal refractive ind
ices of 7.5 mol.% Nb:KTiOPO4 (Nb:KTP) crystals for the wavelengths 539.75,
632.8, 1079.5, and 1341.4 nm at the temperature range from 319.25 to 416.15
K, simple expressions of the thermal refractive index coefficients as a fu
nction of wavelengths are presented. They agree well with the measured resu
lts and can be used to calculate the principal thermal refractive index coe
fficients at different wavelengths in 7.5 mol.% Nb:KTP crystals for nonline
ar optical device designing. (C) 1999 Published by Elsevier Science B.V. Al
l rights reserved.