title: Spectral broadening in Raman fiber lasers.
abstract: We present an analytical theory based on wave kinetic equations that describes a Raman fiber laser (RFL) generation spectrum. It is shown both theoretically and experimentally that the quasi-degenerate four-wave mixing between different longitudinal modes is the main broadening mechanism in the one-stage RFL at high powers. The shape and power dependence of the intracavity Stokes wave spectrum are in excellent quantitative agreement with predictions of the theory.
authors.affiliation: Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia.
authors.forename: S A
authors.initials: SA
authors.lastname: Babin
authors.forename: D V
authors.initials: DV
authors.lastname: Churkin
authors.forename: A E
authors.initials: AE
authors.lastname: Ismagulov
authors.forename: S I
authors.initials: SI
authors.lastname: Kablukov
authors.forename: E V
authors.initials: EV
authors.lastname: Podivilov