Abstract

In light of recent progress in the fabrication of gallium lanthanum sulfide (GaLaS) fibers, we have modeled the performance of dysprosium-doped GaLaS fiber amplifiers operating at 1.3 µm. Based on experimental data, we find that the incorporation of a codopant (terbium) in the fiber core significantly shortens the optimum amplifier length from >30 m to 3 m. Such a device may be practical, given the fiber losses currently achieved in GaLaS fibers.

© 1997 Optical Society of America

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