Open AccessInfluence of dark irradiation on transition process from self-defocusing to self-focusing in LiNbO3:Fe crystals
Author(s) -
ChiChou Huang,
Guo Ru,
Simin Liu,
Qiang Sheng,
Gao Yuan-Mei,
Wan Da-Yun,
Zhaohong Liu,
Xiaohua Zhang,
Yi Lu
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.1367
Subject(s) - irradiation , photorefractive effect , self focusing , materials science , optics , condensed matter physics , process (computing) , optoelectronics , physics , laser beams , laser , quantum mechanics , computer science , operating system
We have studied the dynamic propagation of an optical beam from selfdefocusing to selffoc using in photovoltaic photorefractive crystals LiNbO3:Fe in the framework of a t wodimensional band transport model. The results show that dark irradiation pla ys an important part in the transition process. The transition occurs only when th e normalized dark irradiation is very small. We discuss also the influence of py roelectric effect on the transition process.