We report here, for the first time, observations of offset and collaterally burned holes in erbium-doped fiber amplifiers (EDFAs). This additional spectral-hole-burning structure in the 1.5-μm region will impact the application of EDFAs in the wavelength-division-multiplexed environment as well as their descriptive models.
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Rudkevich et al. (1999) studied this question.
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