摘要
We investigate the photorefractive phase conjugation in a Ce:Fe:LiNbO_(3) crystal asa function of temperature(293-393 K)and find the phase conjugate reflectivity in-creases sharply in the vicinity of 55,70 and 110℃.The anomalous phenomenon ispossibly concerned with the structural phase transformation of a crystal,which in-duces an extra internal electric ficld to influence the phase conjugation.The value ofthe field is estimated at the order of 10^(5)V/m,in agreement with the published data.
