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http://dx.doi.org/10.3807/KJOP.2006.17.4.305

Saturation Absorption Spectroscopy for Two Photon Coherence of 85Rb D1 lines  

Nho, J.W. (Department of Physics, Kongju National University)
Kang, M.I. (Department of Physics, Kongju National University)
Ryu, J.W. (Department of Physics, Kongju National University)
Moon, H.S. (Division of Optical Metrology, Korea Research Institute of Standards and Science)
Publication Information
Korean Journal of Optics and Photonics / v.17, no.4, 2006 , pp. 305-311 More about this Journal
Abstract
We propose a 7-level atom model, which takes into account two-photon coherence effects in saturation absorption spectroscopy. Using this model we explained spectral change with laser intensity and some of crossover resonance lines, which cannot be explained with Nakayama theory. The 7-level model consists of two upper levels and five lower levels, which account for $\pi-\pi$ polarization of both pump and probe beams in Zeeman sub levels. We compared our 7-level model with 4-level Nakayama theory for 5S$_{1/2}$ - 5P$_{1/2}$ transition line in $^{85}$Rb atoms. The results of the 7-level model calculation agree well the saturation absorption spectra data according to laser intensities.
Keywords
Saturation absorption spectroscopy; Nakayama's theory; Rate equation; Atomic coherence;
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