D. Xue et K. Betzler, Influence of optical-damage-resistant dopants on the nonlinear optical properties of lithium niobate, APP PHYS B, 72(6), 2001, pp. 641-645
Using the chemical-bond method, nonlinear optical properties of lithium nio
bate containing different dopants are calculated. In crystals with stoichio
metric composition the second order nonlinear susceptibility decreases appr
oximately linearly with increasing dopant concentration. Among the dopants
studied - Mg, Zn and In - this behaviour is most highly expressed for In do
ping. In contrast to that, congruently grown crystals show a different beha
viour; only a weak dependence on the dopant concentration is found for, for
example, Mg-doped material.