摘要
A slant grating was recorded with two laser beams incident on photorefractive crystal in an external dc electric field.Two-dimensional perturbative analytical solution for the first two-order space-charge field for steady-state photorefractive slant grating recording has been obtained.It is shown that the inclusion of the longitudinal component of the space-charge field during photorefractive two-wave coupling can predict reduction of the fundamental harmonic and enhancement or reduction of the second-order harmonic for various applied field strength and various grating slant angles.The dependence of the first two-order harmonics on the slant angle and on the applied field strength is examined.
作者
姜永远
冯玉文
周忠祥
李焱
孙秀冬
许克彬
JIANG Yong-yuan;FENG Yu-wen;ZHOU Zhong-xiang;LI Yan;SUN Xiu-dong;XU Ke-bin(Department of Applied Physics,Harbin Institute of Technology,Harbin 150001)
基金
Supported by the Natural Science Foundation of Heilongjiang Province。