Study of Temperature Enhancement of the Photorefractive Effect in Ce: Fe: LiNbO_3 Crystal

摘要

In the range of 20 to 120℃, the two-beam coupling exponential gain coefficient and the four-wave mixing phase conjugation reflectivity have been investigated. It is shown that the values such as the gain, the phase conjugation reflectivity and the response speed increase as the temperature increases. At about 55, 71 and 110℃, extraordinary enhancement of the gain and the phase conjugation reflectivity were observed. The mechanism is analyzed by the phase change in the crystal at these temperatures.