Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Lettere al nuovo cimento della societa italiana di fisica/Lettere al nuovo cimento

Four-level co-operative cascade emission in cesium

E. Campani, G. Degan, ERSEO POLACCO, Giampaolo Gorini

Published Oct 1, 1979• 1 citation
Publisher
DOI
10.1007/bf02746645

Related papers

Experimental observation of emission lines from auto-ionization levels of cesium

I. S. Aleksakhin, G.G. Bogachev, V. S. Bukstich +1 more

JETPL•Nov 1, 1973•0 citations

Superradiant cascade emissions in an atomic ensemble via four-wave mixing

H. H. Jen

arXiv:1501.05099•Annals of Physics•Jun 6, 2015•26 citations

Destruction of darkness: Optical coherence effects and multi-wave mixing in rubidium vapor

Alexander S. Zibrov

We describe several novel experimental effects resulting from optical coherences in multilevel atoms driven with coherent laser fields. Four configurations were explored using Rb vapor cells: lambda dark-line resonances, single beam double-lambda oscillations, and cascade two-photon transitions in co- and counter-propagating geometries. Experiments were performed with high spectral-resolution using low-power diode lasers sources and optically thick cells. Two of the most striking effects we observed are: (1) a self-oscillation that occurs at 3.0 GHz on the 85Rb hyperfine frequency when a single laser field pumps the atoms, and (2) a coherent blue-beam emission that we observe in the co-propagating cascade two-photon case. These phenomena lead to complex lineshapes, and the effects sometimes dominate the well-known 3-level coherence effects. Additional higher-order mixing or cascaded interferences are apparent in all four experimental configurations. Many of these can be viewed as multi-wave mixing enhanced by optical coherences around closed-loop paths of atomic energy levels. The effects are particularly strong when four-photon closed-loop paths with resonant energy levels are possible, as in, the double-lambda system or as a four-wave mixing “box.”

AIP conference proceedings•Jan 1, 2001•4 citations

Observation of four-wave parametric interactions in cesium and barium vapors

G V Venkin, Gennady M. Krochik, Leonid L. Kulyuk +2 more

Frequency-split (nondegenerate) four-wave quasiresonant interactions between monochromatic waves were observed in cesium vapor. The intensity of the generated waves was sufficient for cascade stimulated emission. Moreover, it was found that sum frequencies were generated in barium vapor and a conversion efficiency of ~ 10 –3 (measured relative to the pump energy) was sufficient for a quasiresonant four-wave parametric process.

Soviet Journal of Quantum Electronics•Mar 31, 1976•5 citations

Energy pooling in cesium vapor

Cedomil Vadla, Kay Niemax, J. Brust

Zeitschrift für Physik D Atoms Molecules and Clusters•Sep 1, 1996•16 citations

Co-operative atomic interactions in one- and two-photon micromasers

I Ashraf, A. H. Toor

We have developed a quantum theory of the micromaser for a pair of two-level atoms for the case of one- and two-photon transition coupling. We have studied the effect of co-operativity on the photon statistics for these systems for different coupling constant ratios. It is found that for equal coupling, our system of a two-atom, one-photon micromaser behaves like a double one-photon cascade micromaser. Similarly, for equal coupling, the photon statistics of the two-atom, two-photon micromaser reduces to that of a three-level, four-photon cascade micromaser.

Journal of Optics B Quantum and Semiclassical Optics•Nov 21, 2000•6 citations
We describe several novel experimental effects resulting from optical coherences in multilevel atoms driven with coherent laser fields. Four configurations were explored using Rb vapor cells: lambda dark-line resonances, single beam double-lambda oscillations, and cascade two-photon transitions in co- and counter-propagating geometries. Experiments were performed with high spectral-resolution using low-power diode lasers sources and optically thick cells. Two of the most striking effects we observed are: (1) a self-oscillation that occurs at 3.0 GHz on the 85Rb hyperfine frequency when a single laser field pumps the atoms, and (2) a coherent blue-beam emission that we observe in the co-propagating cascade two-photon case. These phenomena lead to complex lineshapes, and the effects sometimes dominate the well-known 3-level coherence effects. Additional higher-order mixing or cascaded interferences are apparent in all four experimental configurations. Many of these can be viewed as multi-wave mixing enhanced by optical coherences around closed-loop paths of atomic energy levels. The effects are particularly strong when four-photon closed-loop paths with resonant energy levels are possible, as in, the double-lambda system or as a four-wave mixing “box.”
We have developed a quantum theory of the micromaser for a pair of two-level atoms for the case of one- and two-photon transition coupling. We have studied the effect of co-operativity on the photon statistics for these systems for different coupling constant ratios. It is found that for equal coupling, our system of a two-atom, one-photon micromaser behaves like a double one-photon cascade micromaser. Similarly, for equal coupling, the photon statistics of the two-atom, two-photon micromaser reduces to that of a three-level, four-photon cascade micromaser.