Absorption and fluorescence in atomic submicron cell: high laser intensity case

David Sarkisyan; Tigran Varzhapetyan; Aram Papoyan; Daniel Bloch; Martial Ducloy

doi:10.1117/12.677912

19 May 2006 Absorption and fluorescence in atomic submicron cell: high laser intensity case

David Sarkisyan, Tigran Varzhapetyan, Aram Papoyan, Daniel Bloch, Martial Ducloy

Proceedings Volume 6257, ICONO 2005: Nonlinear Laser Spectroscopy, High Precision Measurements, and Laser Biomedicine and Chemistry; 625701 (2006) https://doi.org/10.1117/12.677912
Event: ICONO 2005, 2005, St. Petersburg, Russian Federation

Abstract

Absorption and fluorescence in Rb sub-micron cell on D₂ line have been studied when the thickness L varies in the range of 0.5 λ - 3.5 λ, and the laser intensity is 0.1 - 1 W/cm² (λ = 780 nm, λ_L ~ 5 MHz). When L = (2n +1) λ/2 (n-integer) and I ~ 0.1 W/cm², revival of peaks of Dicke-type coherent narrowing effect with some modification of the spectra (as compared with low intensity regime) are still observable. The experimental results obtained at I ~ 1 W/cm² for L = λ/2 show that there are no "dips" of a reduced absorption in the spectra, though there is a strong spectral broadening of the absorption (and fluorescence), as well as a reduction of the absorption (in contrast, I ~ 1 mW/cm² is sufficient to create the dips when L = λ). Probably, this is caused by a strong Dicke narrowing regime when L = λ/2. Several additional differences of fluorescence and absorption spectra behaviour at high intensities are revealed.

Citation Download Citation

David Sarkisyan, Tigran Varzhapetyan, Aram Papoyan, Daniel Bloch, and Martial Ducloy "Absorption and fluorescence in atomic submicron cell: high laser intensity case", Proc. SPIE 6257, ICONO 2005: Nonlinear Laser Spectroscopy, High Precision Measurements, and Laser Biomedicine and Chemistry, 625701 (19 May 2006); https://doi.org/10.1117/12.677912

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