TY - JOUR
T1 - Optimization of the gain in non-uniform gratings in a Bi12SiO20 crystal considering the variation of fringe period, optical activity and polarization angles in a strong non-linear regime
AU - González, G.
AU - Zúiga, A.
AU - Magaña, L. F.
PY - 2008/12
Y1 - 2008/12
N2 - We solved numerically the set of non-linear differential material rate differential equations, and using these solutions, we include the nonuniformity of the grating and of the magnitude and phase of light modulation along a sample thickness to calculate self-consistently the energy exchange in two-wave mixing. We optimize the gain, considering strong nonlinear conditions, variation of fringe period, optical activity, birefringence, absorption, polarization angle, applied fields and two crystal orientations: the grating vector parallel and perpendicular to the face [001] Under these conditions there is a complex relationship among all these parameters, and the prediction of the conditions for the optimum value of the gain is not simpleWe report the optimal sample thickness for different situationsWe obtained a maximum gain of 5.2.
AB - We solved numerically the set of non-linear differential material rate differential equations, and using these solutions, we include the nonuniformity of the grating and of the magnitude and phase of light modulation along a sample thickness to calculate self-consistently the energy exchange in two-wave mixing. We optimize the gain, considering strong nonlinear conditions, variation of fringe period, optical activity, birefringence, absorption, polarization angle, applied fields and two crystal orientations: the grating vector parallel and perpendicular to the face [001] Under these conditions there is a complex relationship among all these parameters, and the prediction of the conditions for the optimum value of the gain is not simpleWe report the optimal sample thickness for different situationsWe obtained a maximum gain of 5.2.
KW - Beam coupling
KW - Energy exchange
KW - Non-linear optics
KW - Photorefractive gratings
KW - Refractive index
UR - http://www.scopus.com/inward/record.url?scp=68949128900&partnerID=8YFLogxK
M3 - Artículo
SN - 0035-001X
VL - 54
SP - 433
EP - 439
JO - Revista Mexicana de Fisica
JF - Revista Mexicana de Fisica
IS - 6
ER -