title: Octave-spanning spectra and pulse synthesis by nondegenerate cascaded four-wave mixing.
abstract: We present a theoretical model and 2D numerical simulation of cascaded four-wave mixing of femtosecond pulses in bulk chi((3)) media, evidencing the importance of 2D interaction geometries in the efficient generation of frequency-converted pulses. Octave-spanning spectra and pulse synthesis down to the sub-two-cycle regime is demonstrated without the need for complex amplitude or phase control, in agreement with experimental measurements.
authors.affiliation: IFIMUP/IN-Institute of Nanoscience and Nanotechnology and Departamento de Física, Faculdade de Ciências,Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal.
authors.forename: João L
authors.initials: JL
authors.lastname: Silva
authors.forename: Rosa
authors.initials: R
authors.lastname: Weigand
authors.forename: Helder M
authors.initials: HM
authors.lastname: Crespo