A full vectorial model for pulse propagation in emerging waveguides with subwavelength structures part I: Kerr nonlinearity.
The propagation of pulses through waveguides with sub-wavelength features, inhomogeneous transverse structure, and high index contrast cannot be described accurately using existing models in the presence of nonlinear effects. Here we report the development of a generalised full vectorial model of nonlinear pulse propagation and demonstrate that, unlike the standard pulse propagation formulation, the z-component of guided modes plays a key role for these new structures, and results in generalised definitions of the nonlinear coefficient gamma, Aeff , and mode orthognality. While new definitions reduce to standard definitions in some limits, significant differences are predicted, including a factor of approximately 2 higher value for gamma, for emerging waveguides and microstructured fibers.
Afshar V
Shahraam
S
Centre of Expertise in Photonics, School of Chemistry & Physics, University of Adelaide, Adelaide, SA 5005, Australia.
Monro
Tanya M
TM
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D055096:Optical Devices; D055100:Optical Fibers; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity