LOCAL GAUGE-INVARIANCE OF THE 2-BEAM COUPLING EQUATIONS

被引：0
|
作者：
SANCHEZ, F
机构：
[1] Ecole Nationale Superieure des Sciences Appliquées et de Technologie, Laboratoire d’Optronique, Equipe associee au CNRS EP0001, Lannion Cedex, 22305, 6 rue de Kerampont
来源：
JOURNAL OF MODERN OPTICS | 1993年 / 40卷 / 10期
关键词：
D O I：
10.1080/09500349314552041
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An analytical comparison between the exact model of two-wave mixing in thin nonlinear local response absorbing media and a simplified theory is presented. The approach adopted here consists of studying the dynamical interaction of four waves: the two incident beams and the two main diffracted orders. The simplified model assumes energy conservation in a weakly absorbing medium. It is demonstrated that the two models give exactly the same results for any absorption coefficient. It is shown that the simplified model is correct in weakly or highly absorbing media. This is due to a local gauge invariance of the coupled equations.
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收藏
页码：2053 / 2056
页数：4
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