Improvement of the Two-Beam Coupling Response Time in Photorefractive Double-Doping KNbO3
ZHANG Zhi-guo1,2, Y. Ding1, H. J . Eichler1, FU Pan-ming2, ZHOU Gang3, TANG Jun-xiong3, SHEN De-zhong4, MA Xiao-yan4, CHEN Jiong-yao4
1Optical Institute, Technical University of Berlin, Str. des 17, Juni 135, 10623 Berlin, Germany
2Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
3Department of Radio-Electronics, Peking University, Beijing 100871
4Research Institute of Synthetic Crystals, Beijing 100018
Improvement of the Two-Beam Coupling Response Time in Photorefractive Double-Doping KNbO3
1Optical Institute, Technical University of Berlin, Str. des 17, Juni 135, 10623 Berlin, Germany
2Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
3Department of Radio-Electronics, Peking University, Beijing 100871
4Research Institute of Synthetic Crystals, Beijing 100018
Abstract： We report experimental studies on the photorefractive response of KNbO3 doubly doped with manganese and rubidium, iron and rubidium, respectively. Two- beam coupling response time in KNbO3:Mn:Rb is 3 to 10 times shorter while the two-beam coupling gain coefficient remains almost the same when compare with that in KNbO3 :Mn. On the other hand, under similar conditions, two-beam coupling response time in KNbO3 :Fe:Rb is 6 times faster than that in KNbO3 :Fe.
1997, Vol. 14 
