Simultaneous observation of N- and EIT- resonances in 40-micron thin cell filled with Rb and buffer gas

A. Sargsyan; R. Mirzoyan; S. Cartaleva; D. Sarkisyan

doi:10.1117/12.2010673

15 March 2013 Simultaneous observation of N- and EIT- resonances in 40-micron thin cell filled with Rb and buffer gas

A. Sargsyan, R. Mirzoyan, S. Cartaleva, D. Sarkisyan

Proceedings Volume 8770, 17th International School on Quantum Electronics: Laser Physics and Applications; 87700K (2013) https://doi.org/10.1117/12.2010673
Event: Seventeenth International School on Quantum Electronics: Laser Physics and Applications, 2012, Nessebar, Bulgaria

Abstract

We report simultaneous observation of the N- and EIT- resonances formation using multi-region (MR) cell, which contains micrometric –thin region with the thickness L varying in the range of 1μm - 90μm. MR cell is filled with natural Rb and 150 Torr neon gas. To form N- and EIT- resonances in Λ-system, two lasers are used: the probe (with tunable frequency), and the coupling (with the fixed frequency) with λ ≈ 795 nm wavelength and 1MHz- line-width. Although, the best parameters of N-resonance could be obtained for a cell thickness about 1cm, the use of MR cell with the thickness 30-40 μm still allows to obtain a good contrast and a narrow line-width. The N-resonance demonstrates subnatural increase of the probe absorption and is formed when probe frequency ν_P1 is in resonance with the ⁸⁵Rb transition F_g=2 →5P_1/2, while for the coupling frequency the condition υ_C = υ_P1 + Δ₁ (Δ₁=3036 MHz) is fulfilled. The EITresonance is formed when ν_P2 scans the transition ⁸⁷Rb, F_g=2 →5P_1/2 and for the same coupling frequency the condition υC = υ_P2 +Δ₂ (Δ₂=6835 MHz) should fulfill. The frequency separation between N- and EIT-resonances is equal to Δ₂-Δ₁≈ 3.8 GHz. We also detected the low-frequency beating signal when the condition υ_C ≈ ν_P' is fulfilled, which allows a directly determine the coupling frequency υ_C. Splitting of N-resonance in the external longitudinal magnetic field into five components is detected. Possible applications are addressed.

Citation Download Citation

A. Sargsyan, R. Mirzoyan, S. Cartaleva, and D. Sarkisyan "Simultaneous observation of N- and EIT- resonances in 40-micron thin cell filled with Rb and buffer gas", Proc. SPIE 8770, 17th International School on Quantum Electronics: Laser Physics and Applications, 87700K (15 March 2013); https://doi.org/10.1117/12.2010673

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KEYWORDS

Rubidium

Magnetism

Laser beam diagnostics

Absorption

Neon

Sapphire

Tunable lasers

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