Abstract
Based on the Lagrangian formulation, we present a new variational approach to study the influence of cross-phase modulation on solitonlike pulse switching in twin-core fiber couplers and birefringent fibers. For self-routing pulse switching we found an excellent agreement between our finite-dimensional Hamiltonian system and the split-step Fourier method. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 15: 91–95, 1997.
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