Poletti, Francesco and Horak, Peter (2008) Description of ultrashort pulse propagation in multimode optical fibers. Journal of the Optical Society of America B, 25 (10), 1645-1654. (doi:10.1364/JOSAB.25.001645).
Abstract
The guided, single-mode propagation of ultrashort optical pulses is commonly described by a well studied and understood generalized nonlinear Schrödinger equation. Here we present and discuss an extended version for multimode optical fibers and waveguides including polarization effects, high-order dispersion, Kerr and Raman nonlinearities, self-steepening effects, as well as wavelength-dependent mode coupling and nonlinear coefficients. We then investigate the symmetry properties of the nonlinear coupling coefficients for the cases of step-index and circularly symmetric conventional fibers and for microstructured fibers with hexagonal symmetry. Finally, we study the computational complexity of the proposed algorithm.
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