title: Intermodal and cross-polarization four-wave mixing in large-core hybrid photonic crystal fibers.
abstract: Degenerate four-wave mixing is considered in large mode area hybrid photonic crystal fibers, combining photonic bandgap guidance and index guidance. Co- and orthogonally polarized pump, signal and idler fields are considered numerically by calculating the parametric gain and experimentally by spontaneous degenerate four-wave mixing. Intermodal and birefringence assisted intramodal phase matching is observed. Good agreement between calculations and experimental observations is obtained. Intermodal four-wave mixing is achieved experimentally with a conversion efficiency of 17%.
authors.forename: Sidsel R
authors.initials: SR
authors.lastname: Petersen
authors.forename: Thomas T
authors.initials: TT
authors.lastname: Alkeskjold
authors.forename: Christina B
authors.initials: CB
authors.lastname: Olausson
authors.forename: Jesper
authors.initials: J
authors.lastname: Lægsgaard