We report that inBaTiO3:Rhthe carrier-type depends not only on the postprocessing condition but also on the incident wavelength in two beam coupling. Carriers are the holes for the as-grown sample, and change to electrons for the sample reduced in the atmosphere of10−14 atmoxygen partial pressure. However, for the sample reduced in the atmosphere of10−10 atmoxygen partial pressure, the carrier is an electron for the incident wavelength of 514 nm, and a hole for 633 nm. Its absorption, photoinduced absorption, and two beam coupling are investigated and discussed. ©1998 American Institute of Physics.