Patent ID: 7733561
Filing Date: 2010-06-08
Classification: H01S

Abstract:
1. An optically-pumped fiber amplifier for suppressing stimulated Brillouin scattering (SBS) comprising an optical signal source; a section of fiber responsive to the optical signal source for amplifying an optical output signal therefrom, said section of fiber comprising at least two separate fiber segments disposed in series, each fiber segment formed to exhibit a different Brillouin center frequency, the Brillouin center frequencies being sufficiently different to prevent continuing Brillouin amplification in a backward-propagating Stokes signal passing from one fiber segment into an adjacent fiber segment of the fiber amplifier, reducing the total Stokes power generated in the fiber amplifier, wherein the at least two fiber segments comprise segments of different lengths disposed such that at least one fiber segment of shorter length is disposed at an output end of the optically-pumped fiber amplifier.