title: Reversed dispersion slope photonic bandgap fibers for broadband dispersion control in femtosecond fiber lasers.
abstract: Higher-order-mode solid and hollow core photonic bandgap fibers exhibiting reversed or zero dispersion slope over tens or hundreds of nanometer bandwidths within the bandgap are presented. This attractive feature makes them well suited for broadband dispersion control in femtosecond pulse fiber lasers, amplifiers and optical parametric oscillators. The canonical form of the dispersion profile in photonic bandgap fibers is modified by a partial reflector layer/interface placed around the core forming a 2D cylindrical Gires-Tournois type interferometer. This small perturbation in the index profile induces a frequency dependent electric field distribution of the preferred propagating higher-order-mode resulting in a zero or reversed dispersion slope.
authors.affiliation: Furukawa Electric Institute of Technology Ltd, H-1158 Budapest, Hungary. z.varallyay@feti.hu
authors.forename: Z
authors.initials: Z
authors.lastname: Várallyay
authors.forename: K
authors.initials: K
authors.lastname: Saitoh
authors.forename: J
authors.initials: J
authors.lastname: Fekete
authors.forename: K
authors.initials: K
authors.lastname: Kakihara
authors.forename: M
authors.initials: M
authors.lastname: Koshiba
authors.forename: R
authors.initials: R
authors.lastname: Szipocs
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design; D020342:Finite Element Analysis; D007368:Interferometry / Q000295:instrumentation* / Q000379:methods*; D007834:Lasers; D015233:Models, Statistical; D055095:Optics and Photonics; D009991:Oscillometry; D017785:Photons