Assuming infinite relaxation times and negligible pulse attenuation, we calculate the ringing produced when a resonant light pulse passes through a medium. These assumptions imply that each atom of the medium is excited identically and will therefore radiate coherently. Two models are used for the atoms of the medium: the classical harmonic oscillator and the two-level quantum-mechanical atom. The validity of the various approximations is discussed in detail.
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Burnham et al. (1969) studied this question.
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