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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 33,
  • Issue 21,
  • pp. 4437-4444
  • (2015)

Modelling of Supercontinuum Generation in the Germanium-on-Silicon Waveguided Platform

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Abstract

The influence of high-order susceptibilities on the supercontinuum generation process in germanium-on-silicon waveguides has been investigated in detail in the midinfrared. The frequency dispersion of both the three-photon absorption coefficient and the real part of the fifth-order susceptibility has been investigated in order to develop a self-consistent modeling based upon a generalized nonlinear Schrödinger equation. Numerical results demonstrate that germanium-on-silicon waveguides can be used to induce supercontinuum generation over 1.34-μm-wide bandwidth with 200-fs input pulses pumped at a wavelength of 4 μm with peak pump powers of 89 W and waveguide lengths of 4.6 mm. The soliton fission process has also been observed as it is the main mechanism behind the supercontinuum generation.

© 2015 IEEE

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