کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
851445 | 909319 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Dynamic study of the gain in two beam coupling in photorefractive materials Dynamic study of the gain in two beam coupling in photorefractive materials](/preview/png/851445.png)
Wave equations describing the non-linear two-beam coupling have been solved and expressions for the gain of the two beams in the photorefractive crystals have been derived. In case of the degenerate two-beam coupling, the gain depends upon the crystal thickness, coupling coefficient, absorption coefficient and the input intensity ratio. The effect of these parameters on the gain has been studied in details. In case of non-degenerate two-beam coupling the gain not only depends upon crystal thickness, coupling coefficient, absorption coefficient and the input intensity ratio but also on the response time of the photorefractive medium. This response time is the function of concentration ratio. The influence of oscillation frequency shift, concentration ratio on the gain for the non-degenerate two-beam coupling has also been studied.
Journal: Optik - International Journal for Light and Electron Optics - Volume 123, Issue 15, August 2012, Pages 1329–1335