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Computational modeling of femtosecond optical solitons from Maxwell's equations

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4 Author(s)
Goorjian, P.M. ; NASA Ames Res. Center, Moffett Field, CA, USA ; Taflove, Allen ; Joseph, R.M. ; Hagness, S.C.

An algorithm is developed that permits the direct time integration of full-vector nonlinear Maxwell's equations. This capability permits the modeling of both linear and nonlinear instantaneous and dispersive effects in the electric polarization in material media. The modeling of the optical carrier is retained. The fundamental innovation is to notice that it is possible to treat the linear and nonlinear convolution integrals, which describe the dispersion, as new dependent variables. A coupled system of nonlinear second-order ordinary differential equations can then be derived for the linear and nonlinear convolution integrals, by differentiating them in the time domain. These equations, together with Maxwell's equations, are solved to determine the electromagnetic fields in nonlinear dispersive media. Results are presented of calculations in one dimension of the propagation and collision of femtosecond electromagnetic solitons that retain the optical carrier, taking into account the Kerr and Raman interactions

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Quantum Electronics, IEEE Journal of  (Volume:28 ,  Issue: 10 )