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 . Based on experimental data, we find that the incorporation of
a codopant (terbium) in the fiber core significantly shortens the optimum
amplifier length from to . Such a device may be practical, given the fiber losses currently
achieved in GaLaS fibers.
© 1997 Optical Society of America
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