Studies of the performance of a nonlinear directional fiber coupler with periodically modulated dispersion: Analytical Results

Marcio Silva, E. de Almeida, Cícero Sobrinho, J. Lima, Antonio Sombra

DOI: 10.14209/sbrt.2005.1089

Evento: XXII Simpósio Brasileiro de Telecomunicações (SBrT2005)

Keywords: Optics Fiber nonlinear Couplers dispersion Solitons kerr effect

Abstract

Optical fiber couplers have been studied for their potential applications to ultrafast all optical switching processing, like optical switch. In this work, we report numerical and analytical studies of the propagation of ultrashort optical soliton pulses in two-core nonlinear fiber couplers constructed with periodically modulated dispersion fiber (PMDF). Using the technique developed by Chu, we convert the coupled nonlinear Schrödinger equations (NLSE’s) into a variational problem with a corresponding Lagrangian equations of motion for a finite number of degrees of freedom and obtain the switching characteristics of the device. The transmission characteristics, the critical energy, extinction ratio (Xratio) and the crosstalk level (Xtalk) for first order solitons were studied for low to high pump powers.

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