Soliton switching in a Kerr coupler with coupling constant dispersion: a variational analysis
نویسندگان
چکیده
Soliton switching in a nonlinear directional coupler (NLDC) with Kerr nonlinearity and coupling constant dispersion (caused by intermodal dispersion between the symmetric and the anti-symmetric modes of the coupler) is studied using the well-known variational method. Switching characteristics are calculated and discussed. It is shown that the switching characteristics of the Kerr coupler for all the pulses, with pulse width ranging from 10 to 100 fs, are identical for a given value of the coupling coefficient. The effect of the coupling coefficient on the critical energy for switching is studied and discussed. The amplitude and pulse width variations inside the coupler are presented, discussed and compared with the result of our numerical calculation of soliton evolution inside the coupler. PACS: 41.81.Dp; 42.50.Rh; 42.65.Pc
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