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By Banerjee, Partha P.; Jarem, John M

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Additional resources for Computational Methods for Electromagnetic and Optical Systems, Second Edition

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However, the shift in the position of the mainlobe in the thick sample model is much smaller as compared to the thin sample case due to the effective decrease in the PR effect for a small waist size, as explained above. 2 mm. We would like to comment that for the above parameters, DBF was also numerically observed at the exit face of the thick PR sample. Thus far we have analyzed the propagation of a single focused Gaussian beam in a diffusiondominated PR medium. When two beams are incident on such a medium with a small angle between each other, the induced refractive index profile is responsible for energy exchange between the two beams, a phenomenon referred to as TBC.

Research Signpost, Trivandrum, India, 2007. 9 Evolution of a second order 1-D soliton. (From Nehmetallah, G. A. O. , Research Signpost, Trivandrum, India, 2007. ) exp{Sˆ Δz} = exp − j γ ʹ ue Δz . As expected, the “pulse” remains unchanged with propagation. 30 in one transverse dimension (x). The result is a spatial soliton. 9. The split-step technique has also been applied to analyze propagation of profiles in two transverse dimensions [11], and also to analyze propagation of optical fields that are pulsed in time and have a spatial profile in the transverse dimension [12].

In this simulation, we track both the phase and amplitude modulation of the beam within the crystal due to the combined effects of propagational diffraction (along x, y) and induced refractive index (along x) arising from the PR effect. 17a and b shows the normalized far-field intensity patterns with W and P as parameters. 17a). The results are qualitatively similar: DBF is seen to reduce at very low (high) and very high (low) values of P (W). , 70 μm), which are independent of the model (thin or thick sample) used for simulation.

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