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Optics Letters


  • Vol. 8, Iss. 2 — Feb. 1, 1983
  • pp: 105–107

Experimental evidence for collision-induced superradiance

A. Crubellier, S. Liberman, D. Mayou, and P. Pillet  »View Author Affiliations

Optics Letters, Vol. 8, Issue 2, pp. 105-107 (1983)

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An experiment performed on barium atoms has permitted us to observe an infrared emission whose spectral and temporal analysis has led us to identify it with collision-induced superradiance. Tentative theoretical interpretation is given in the dressed-atom formalism using the monochromatic approximation.

© 1983 Optical Society of America

Original Manuscript: October 18, 1982
Published: February 1, 1983

A. Crubellier, S. Liberman, D. Mayou, and P. Pillet, "Experimental evidence for collision-induced superradiance," Opt. Lett. 8, 105-107 (1983)

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  8. The formulas are written for large positive δ. For large negative δ, levels |1n〉 and |2n〉 must be interchanged; Raman emission then occurs in the transition |2n〉 → |3n〉 and collision-induced emission occurs in the transition |1n〉 → |3n〉, and the final result is the same as for positive δ.
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  10. At resonance, these pumping effects give rise to relaxation oscillations [A. Crubellier, S. Liberman, D. Mayou, P. Pillet, M. G. Schweighofer, Opt. Lett. 7, 16 (1982)]. Here they are responsible for the broadening of those pulses whose delay times are of the same order as the laser-pulse duration (see Fig. 2). [CrossRef] [PubMed]
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