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Solitons in Nonlocal Media

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CONTENTS<br />

4.3.3 Soliton Trajectory . . . . . . . . . . . . . . . . . . . . . . . . . . 77<br />

4.3.4 Solution for Initially Overlapp<strong>in</strong>g Beams . . . . . . . . . . . . . . 79<br />

4.4 Breath<strong>in</strong>g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83<br />

4.4.1 Coupl<strong>in</strong>g Geometry . . . . . . . . . . . . . . . . . . . . . . . . . 83<br />

4.4.2 Comparison Between Numerical Simulations and Experimental<br />

Observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83<br />

5 Dissipative Self-Conf<strong>in</strong>ed Optical Beams <strong>in</strong> Doped Nematic Liquid<br />

Crystals 88<br />

5.1 Ga<strong>in</strong> and Solitary Waves Propagation . . . . . . . . . . . . . . . . . . . 88<br />

5.2 Light Self-Conf<strong>in</strong>ement <strong>in</strong> Dye Doped Nematic Liquid Crystals: Model . 89<br />

5.3 Constant Optical Amplification . . . . . . . . . . . . . . . . . . . . . . . 91<br />

5.4 Role of Ga<strong>in</strong> Saturation . . . . . . . . . . . . . . . . . . . . . . . . . . . 92<br />

5.4.1 Mechanism for Dye Lum<strong>in</strong>escence: a Simple Model . . . . . . . . 92<br />

5.4.2 Ga<strong>in</strong> Saturation: Numerical Analysis . . . . . . . . . . . . . . . . 97<br />

5.5 Role of the Pump Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . 97<br />

5.6 Co-Propagat<strong>in</strong>g Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98<br />

6 Conclusions 101<br />

A Optical Properties of NLC 102<br />

A.1 Scatter<strong>in</strong>g <strong>in</strong> a NLC Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . 102<br />

A.2 Derivation of the Electromagnetic Rul<strong>in</strong>g Equation <strong>in</strong> NLC . . . . . . . 104<br />

B Numerical Algorithm 108<br />

B.1 Simulations of Nonl<strong>in</strong>ear Optical Propagation <strong>in</strong> NLC . . . . . . . . . . 108<br />

B.1.1 Optical Equation . . . . . . . . . . . . . . . . . . . . . . . . . . . 109<br />

B.1.2 Reorientational Equation . . . . . . . . . . . . . . . . . . . . . . 110<br />

C Analysis of the Index Perturbation Profile 112<br />

C.1 FWHM Computation for the Nonl<strong>in</strong>ear Index Perturbation . . . . . . . 112<br />

C.2 Computation of V υ m(υ) <strong>in</strong> the Gaussian Case . . . . . . . . . . . . . . . . 113<br />

C.3 Computation of V ξ m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114<br />

C.4 Computation of V υ m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116<br />

C.5 Force <strong>in</strong> the Poisson 2D for Small Displacements . . . . . . . . . . . . . 117<br />

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