Publication: Propagation-induced transition from slow to fast light in highly doped erbium fibers
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Publication Date
2008-11-10
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American Physical Society
Abstract
We analyze the propagation regime of an amplitude-modulated
1536 nm signal when traveling along a highly doped erbium fiber pumped at 977 nm as a function of the fiber length. A propagation-induced transition from superluminal to subluminal propagation takes place along the fiber length which allows a change in regime solely based upon increasing the signal modulation frequency. This peculiar behavior is due to the interplay between pump absorption and pump-power broadening of the spectral hole induced by coherent population oscillations. The effect of ion density on this frequency-dependent regime change has been investigated.
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©2008 The American Physical Society