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 Schrodinger equation. Numerical results demonstrate that germanium-on-silicon waveguides can be used to induce supercontinuum generation over 1.34-mu m-wide bandwidth with 200-fs input pulses pumped at a wavelength of 4 mu m 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.
Modelling of Supercontinuum Generation in the Germanium-on-Silicon Waveguided Platform / DE LEONARDIS, Francesco; Troia, Benedetto; Soref, R. A.; Passaro, Vittorio. - In: JOURNAL OF LIGHTWAVE TECHNOLOGY. - ISSN 0733-8724. - 33:21(2015), pp. 4437-4444. [10.1109/JLT.2015.2474133]
Modelling of Supercontinuum Generation in the Germanium-on-Silicon Waveguided Platform
DE LEONARDIS, Francesco;TROIA, Benedetto;PASSARO, Vittorio
2015-01-01
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 Schrodinger equation. Numerical results demonstrate that germanium-on-silicon waveguides can be used to induce supercontinuum generation over 1.34-mu m-wide bandwidth with 200-fs input pulses pumped at a wavelength of 4 mu m 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
