OPTICAL FIBER AMPLIFIER

摘要

An optical system comprising: a fiber amplifier comprising an optically active doped fiber; a source of seed pulses; and a pump source. The doped fiber is doped with one or more active element(s) selected such that the seed pulses are amplified in intensity. The doped fiber has a negative (anomalous) group velocity dispersion in the region from the wavelength of the seed pulses to a threshold wavelength at which the magnitude of the optical loss of the doped fiber is greater than a gain due to stimulated Raman scattering.