title: Spectral-linewidth broadening in synchronous Raman fiber amplification caused by cross-phase modulation effects and its suppression.
abstract: When coherent light is amplified by a synchronous Raman fiber amplifier pumped by output pulses from a high-power erbium-doped fiber amplifier operating in an unsaturated gain regime, the detection efficiency with the heterodyne method is degraded. This degradation is caused mainly by cross-phase modulation effects. It is confirmed that using power-flattened pump pulses can suppress these effects.
authors.forename: T
authors.initials: T
authors.lastname: Sato
authors.forename: T
authors.initials: T
authors.lastname: Horiguchi
authors.forename: M
authors.initials: M
authors.lastname: Tateda
authors.forename: Y
authors.initials: Y
authors.lastname: Koyamada
authors.forename: H
authors.initials: H
authors.lastname: Izumita