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We report the observation of near-infrared Dicke superradiant pulses. The active medium (atomic Na vapor) is optically pumped in the 5S1/2 state and superradiates on transitions cascading down from this level at 3.41, 2.21, and 9.10 {μ}m. The superradiant character of the emission is checked by studying variations of pulse heights and delays versus initial population inversion density.
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Groß et al. (1976) studied this question.
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