Conception, realization and characterization of a very high negative chromatic dispersion fiber. Optical Fiber Technology, Elsevier, 2002, 8, pp.89-105. hal-00469705

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We present an erbium-doped dispersion-compensating fiber made up of two asymmetric concentric cores, inner and outer matched claddings, and erbium located in the central core only. We demonstrate a high negative chromatic dispersion value [-700 ps/(nm km) at 1568 nm], significant modification of the gain spectrum compared with that of a classic erbium-doped fiber amplifier, and 30-dB peak small-signal gain at 1535 and 1553 nm.