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We propose a novel method enabling to create a high-contrast dark resonancein the 87Rb vapor D2-line. The method is based on an optical pumping of atomsinto the working states by a two-frequency, linearly-polarized laser radiationpropagating perpendicularly to the probe field. This new scheme is compared tothe traditional scheme involving the circularly-polarized probe beam only, andsignificant improvement of the dark resonance parameters is found. Qualitativeconsiderations are confirmed by numerical calculations.Comment: 7 pages, 4 figure

the european physical journal. d, atomic, molecular and optical physics/the european physical journal. d, atomic, molecular, optical and plasma physics

High-contrast dark resonance on the D2-line of 87Rb in a vapor cell with different directions of the pump-probe waves