By Banerjee, Partha P.; Jarem, John M
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Additional resources for Computational Methods for Electromagnetic and Optical Systems, Second Edition
At the end of this first nonlinear cycle, the interference pattern is slightly modified. Subsequent iterations of this nonlinear cycle continue to modify the interference pattern (and the modulated index). When the difference between two successive interference patterns is within a chosen tolerance value (we have used 5%), convergence is assumed and the TBC efficiency is determined. All of the scattered beams that exit through the front and rear faces of the crystal are summed (Ep(scatter) and Es(scatter) respectively).
19. The dot-dashed lines show the far-field intensity profiles of the two Gaussian beams in the absence of the PR material. The dashed lines show the beams after energy transfer due to the induced refractive index. The initial pump to signal power is 3. The peak intensity of the pump and signal beams are 63 and 21 W/cm2, respectively, before the interaction. The beams are coupled by a 5 mm BaTiO3 PR material. The output beams do not show any effect of beam fanning at this power; however, with larger beam powers, distortion of the beams due to beam fanning is observed.
In this case, the inhomogeneous operator is zero, and propagation from a plane z = 0 to arbitrary z can indeed be performed in one step in this case. However, in the example we provide, we use the split-step method to convince readers that the result is identical to what one would get if the propagation was covered in one step. 21. 24) where n0 denotes the intrinsic refractive index of the medium, and n(2) is a measure of the gradation in the refractive index. 3 Contour plots showing periodic focusing of an initial Gaussian profile.