title: Temporal localized structures in photonic crystal fibre resonators and their spontaneous symmetry-breaking instability.
abstract: We investigate analytically and numerically the formation of temporal localized structures (TLSs) in an all photonic crystal fibre resonator. These dissipative structures consist of isolated or randomly distributed peaks in a uniform background of the intensity profile. The number of peaks and their temporal distribution are determined solely by the initial conditions. They exhibit multistability behaviour for a finite range of parameters. A weakly nonlinear analysis is performed in the neighbourhood of the first threshold associated with the modulational instability. We consider the regime where the instability is not degenerate. We show that fourth-order dispersion affects the threshold associated with the formation of bright TLSs. We estimate both analytically and numerically the linear and nonlinear corrections to the velocity of moving temporal structures induced by spontaneous broken reflection symmetry mediated by third-order dispersion. Finally, we show that third-order dispersion affects the threshold associated with the moving TLSs.
authors.affiliation: Laboratoire d'instrumentation, Université des Sciences et de la Technologie Houari Boumediene (USTHB), Algiers, Algeria.
authors.forename: L
authors.initials: L
authors.lastname: Bahloul
authors.affiliation: Laboratoire d'instrumentation, Université des Sciences et de la Technologie Houari Boumediene (USTHB), Algiers, Algeria cherbi_lynda@hotmail.com.
authors.forename: L
authors.initials: L
authors.lastname: Cherbi
authors.affiliation: Laboratoire d'instrumentation, Université des Sciences et de la Technologie Houari Boumediene (USTHB), Algiers, Algeria.
authors.forename: A
authors.initials: A
authors.lastname: Hariz
authors.affiliation: Université Libre de Bruxelles (ULB), Faculté des Sciences, CP 231, Campus Plaine, 1050 Bruxelles, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Tlidi
keywords: localized structures; modulational instability threshold; photonic crystal fibre resonator