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Dual-core fiber amplifier for separation of thermal and nonlinear effects

A dual-core waveguide architecture provides two evanescently coupled waveguides where a first waveguide is doped with an active gain species to produce optical power and a second waveguide that runs parallel to the first waveguide is configured to collect the power produced by the first waveguide. Power is harvested from the second waveguide.

Drachenberg, Derrek R.↗