TY  - JOUR
A1  - Elsner, Robert
A1  - Ullmann, Roland
A1  - Heuer, Axel
A1  - Menzel, Ralf
A1  - Ostermeyer, Martin
T1  - Two-dimensional modeling of transient gain gratings in saturable gain
 media
JF  - OPTICS EXPRESS
N2  - A transient two-dimensional model describing degenerate four-wave mixing inside saturable gain media is presented. The new model is compared to existing one-dimensional models with their qualitative results confirmed. Large quantitative differences with respect to peak reflectivity and optimum pump fluence are observed. Furthermore, the influence of the beam focus size, the transverse position and the crossing angle on the reflectivity of the grating is investigated using the improved model. It is demonstrated that the phase conjugate reflectivity depends sensitively on the transverse features of the interacting beams with a transverse shift in the position of the pump beams yielding a threefold improvement in reflectivity. (C) 2012 Optical Society of America
Y1  - 2012
U6  - https://doi.org/10.1364/OE.20.006887
SN  - 1094-4087
VL  - 20
IS  - 7
SP  - 6887
EP  - 6896
PB  - OPTICAL SOC AMER
CY  - WASHINGTON
ER  -