title: Analytical expression of pulse broadening in an arbitrary linear slow light medium.
abstract: We derive an analytical expression for the broadening of a Gaussian input pulse in an arbitrary linear slow light medium. The expression consists of two terms, one corresponding to amplitude broadening (low-pass filtering of the pulse bandwidth) and another corresponding to phase broadening (phase dispersion around the resonance). It is shown that for a Lorentzian gain profile, the amplitude broadening is dominant at small fractional delays. However, for large fractional delays, phase broadening is inevitably dominate.
authors.affiliation: Departamento de Electrónica, Universidad de Alcalá, Escuela Politécnica DO-231, 28871 Spain. miguelg@depeca.uah.es
authors.forename: Miguel
authors.initials: M
authors.lastname: González-Herráez
authors.forename: Sonia
authors.initials: S
authors.lastname: Martin-Lopez
authors.forename: Luc
authors.initials: L
authors.lastname: Thévenaz