We characterize Rh:BaTiO3 by cw two-beam coupling experiments at 1.06
mu m We demonstrate that all our measurements are well described by a
single-carrier, single-site model as soon as the incident intensity is
large enough. The effective trap density is found to be equal to N-ef
f = 6 x 10(16) cm(-3) and the maximum measured gain is 23 cm(-1). At 2
0 W cm(-2) with a measured absorption of 0.15 cm(-1), the time constan
t is 75 s.