Agere Systems Inc.

Aydin Yeniay

Jean-Marc P Delavaux

Sandra Greenberg Kosinski

A fiber amplifier, such as a rare-earth doped fiber amplifier, includes at least two separate sections of (doped) fiber, where residual pump power remaining in one stage (for example, the output stage) of the amplifier is coupled into, and re-used by, the remaining section of (doped) fiber. In particular, a second, longer section of fiber is directly pumped by an externally supplied pump signal and a first, shorter section of doped fiber uses residual pump power from the second section as a pump signal input.

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North Plainfield, NJ, United States of America

Aydin Yeniay