https://doi.org/10.1140/epjd/e2005-00213-7
High-contrast dark resonance on the D2-line of 87Rb in a vapor cell with different directions of the pump-probe waves
1
St. Petersburg State Polytechnic University, Polytekhnicheskaya 29,
St. Petersburg 195251, Russia
2
A.F. loffe Physics-Technical Institute, Polytekhnicheskaya 26, St. Petersburg 194021, Russia
3
Institute for Laser Physics, Birzhevaya liniya 12, St. Petersburg 199034, Russia
4
Observatorie Cantonal Neuchatel, rue de l'Observatoire 58, 2000
Neuchatel, Switzerland
5
Centre National d'Études Spatiales (CNES), 18 avenue Belin, Toulouse 31401, France
Corresponding author: a kazakov@quark.stu.neva.ru
Received:
3
April
2005
Revised:
20
May
2005
Published online:
2
August
2005
We propose a novel method enabling to create a high-contrast dark resonance in the 87Rb vapor D2-line. The method is based on an optical pumping of atoms into the working states by a two-frequency, linearly-polarized laser radiation propagating perpendicularly to the probe field. This new scheme is compared to the traditional scheme involving the σ+-polarized probe beam only, and significant improvement of the dark resonance parameters is found. Qualitative considerations are confirmed by numerical calculations.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 42.50.-p – Quantum optics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
