Phosphosilicate ceramic was doped with Tb3+ using sol-gel technique to
prepare thin films. The films were prepared by spin coating the phosp
hosilicate sols on SiOx/indium-tin-oxide/glass substrates. The photocu
rrent of the films at 355 nm laser excitation was observed. The photor
esponse as a function of applied field and laser energy was linear and
showed no sign of saturation. The films exhibited very stable photore
sponse under a very high number of laser shots. (C) 1997 Elsevier Scie
nce Ltd.