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696 results on '"Porsezian, K."'

152. Ultra-short pulse propagation in birefringent fibers-the projection operator method

Author

Kalithasan, B., Nakkeeran, K., Porsezian, K., Tchofo Dinda, P., Mariyappa, N., Department of Physics, Pondicherry University, Dept Engn, Kings Coll, University of Aberdeen, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Université de Pondichéry, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), and Tchofo Dinda, Patrice

Subjects
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Raman scattering, [CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry, birefringent fibers, dispersion management fiber, [ CHIM.THEO ] Chemical Sciences/Theoretical and/or physical chemistry, nonlinear Schr¨odinger equation, Physics::Optics, projection operation method, nonlinear fiber optics
Abstract

International audience; We examine the propagation of ultra-short optical light pulses in dispersion-managed birefringent fiber transmission systems, in which the pulse dynamics is governed by the coupled higher-order nonlinear Schrödinger equations with higher-order linear and nonlinear optical effects. We derive the equations of motion in terms of pulse parameters such as amplitude, temporal position, width, chirp, frequency and phase, using a projection operator method, and we obtain the spatial dynamical behavior of picosecond and femtosecond pulse parameters. From our detailed analysis, we show that the stimulated Raman scattering has a strong impact on the pulse dynamics.

Published
2008

153. Dynamics of vector dark solitons propagation and tunneling effect in the variable coefficient coupled nonlinear Schrödinger equation.

Author

Musammi, N. M., Porsezian, K., Subha, P. A., and Nithyanandan, K.

Subjects
*SOLITONS, *SCHRODINGER equation, *DYNAMICAL systems, *INHOMOGENEOUS materials, *QUANTUM tunneling
Abstract

We investigate the dynamics of vector dark solitons propagation using variable coefficient coupled nonlinear Schr€odinger (Vc-CNLS) equation. The dark soliton propagation and evolution dynamics in the inhomogeneous system are studied analytically by employing the Hirota bilinear method. It is apparent from our asymptotic analysis that the collision between the dark solitons is elastic in nature. The various inhomogeneous effects on the evolution and interaction between dark solitons are explored, with a particular emphasis on nonlinear tunneling. It is found that the tunneling of the soliton depends on a condition related to the height of the barrier and the amplitude of the soliton. The intensity of the tunneling soliton either forms a peak or a valley, thus retaining its shape after tunneling. For the case of exponential background, the soliton tends to compress after tunneling through the barrier/well. Thus, a comprehensive study of dark soliton pulse evolution and propagation dynamics in Vc-CNLS equation is presented in the paper. [ABSTRACT FROM AUTHOR]

Published
2017
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