Controllable propagation of light pulses in Er-doped fibers with saturable absorption |
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Authors: | Stepanov Serguei Hernández Hernández Eliseo |
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Institution: | Centro de Investigacion Cientifica y de Educacion Superior de Ensenada, Ensenada, Mexico. steps@cicese.mx |
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Abstract: | We report controllable (slow or fast) propagation of low-intensity probe-light pulses through erbium-doped fiber periodically saturated by the synchronized master-pulse sequence. These two pulse sequences could have significantly different carrier wavelengths within the fundamental absorption spectrum 1470-1570 nm of Er(+3) ions. The effect of fractional delay or advancement grew with the fiber optical absorption at the probe wavelength and could be significantly stronger than that at the saturating wavelength. The probe-pulse advancement was observed in the case when the saturating and probe waves were modulated approximately in antiphase. The observed effects are explained in the framework of a simple model of a periodically saturated homogeneously broadened absorption line. |
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