Abstract
We report a study of the wavelength dependence of the gain saturation transition time in an erbium-doped fiber amplifier. A self-probe method that enables us to probe the change of population in an amplifier by using a pulse to induce that change was used to evaluate the transition time over a wavelength range from 1528 to 1559 nm. It was found that the transition time changed from 400 ns to 1.65 μs with increasing wavelength. The wavelength dependence of the transition time was then analyzed using a model to describe the temporal evolution of the erbium population at the input end of a fiber based on McCumber theory.
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