We demonstrate the advantages of using high levels of rhodium (2000-3200 pp
m) to dope barium titanate for achieving finite absorption coefficients (0.
36 cm(-1)), high two-beam coupling gain (11.5 cm(-1)), and acceptable respo
nse time (7 s) at 1.06 mu m. We also report on the mass spectroscopy measur
ements on Rh:BaTiO3 samples indicating a small segregation coefficient for
rhodium (below 0.01) and the presence of a relatively large concentration (
6000 ppm) of unintentionally added strontium.