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Journal of the Optical Society of America A

Observation of bistability near a Doppler-free two-photon transition in rubidium (A)

G. Grynberg, E. Giacobino, Martin Devaud, F. Biraben

Published Jun 1, 1980• 0 citations
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We present in this paper a calculation of the non-linear susceptibility near a Doppler-free two-photon transition. In the case of a two-level system, we find a non-perturbative solution. We deduce new effects on the non-linear refractive index which are related to the change of the linear susceptibility because of the transfer of atoms between the ground and excited levels. In the case of a more complex system, we study at the lowest order of perturbation the anisotropy induced by one beam on the other. At last, we show that it is easy to observe a bistable behaviour when atoms, inside a Pérot-Fabry cavity, interact with a beam whose wavelength is close to a two-photon resonance.

Journal de physique•Jan 1, 1980•19 citations
We present in this paper a calculation of the non-linear susceptibility near a Doppler-free two-photon transition. In the case of a two-level system, we find a non-perturbative solution. We deduce new effects on the non-linear refractive index which are related to the change of the linear susceptibility because of the transfer of atoms between the ground and excited levels. In the case of a more complex system, we study at the lowest order of perturbation the anisotropy induced by one beam on the other. At last, we show that it is easy to observe a bistable behaviour when atoms, inside a Pérot-Fabry cavity, interact with a beam whose wavelength is close to a two-photon resonance.