Importance

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Abstract

A pump assembly includes a pump source operable to generate at least one pump signal operable to pump a Raman gain medium of a Raman amplification stage. The pump assembly further includes an active gain equalization element operable to manipulate a wavelength or an intensity of the at least one pump signal to affect a spectral shape of a Raman gain spectrum associated with the Raman amplification stage. In one particular embodiment, the combination of the Raman gain spectrum and a substantially non-uniform gain spectrum of an existing amplification stage over a wavelength range .lambda..sub.s results in a substantially uniform overall gain spectrum over a wavelength range of at least .lambda..sub.s.

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First Claim