We present analytic solutions for saturated absorption spectra. The analytic forms of all the ground- and excited-state populations were obtained, and the absorption of a counterpropagating probe beam was calculated by solving the rate equations in the presence of a pump laser beam. The analytic solutions were compared with the numerical, experimental results, and Nakayama’s model and good agreement was found between them. We found that the analytic theory could provide accurate spectra at an arbitrary pump beam intensity and diameter.
© 2008 Optical Society of America
Original Manuscript: November 16, 2007
Revised Manuscript: January 11, 2008
Manuscript Accepted: February 18, 2008
Published: April 10, 2008
Geol Moon and Heung-Ryoul Noh, "Analytic solutions for the saturated absorption spectra," J. Opt. Soc. Am. B 25, 701-711 (2008)