Energy transfer in two-wave mixing quasi-degenerated in photorefractive crystals

B BARRERA; NESTOR A ARIAS HERNANDEZ; MARTHA MOLINA PRADO; MYRIAN TEBALDI

Bucaramanga

Conferencia; 3rd International Meeting for Researchers in Materials and Plasma Technology (IMRMPT 2015) & 1st Symposium on Nanoscience and Nanotechnology 2015; 2015

Universidad Industrial de Santander

Wave equations describing the quasi-degenerated two-beam coupling in thephotorefractive crystals for high frequency gratings have been solved. In the case of the quasidegenerate two-beam coupling, equations depend upon the coupling coefficient, the response time of the medium, the input beams frequencies, the absorption coefficient and the input intensity ratio. The response time of the medium is function of the diffusion field, the drift field, the saturation field and the concentration ratio, i.e., the ratio between NA density of acceptorimpurities and ND density of donor impurities. The effect of these parameters on the gain has been studied in details.