Soviet Journal of Quantum ElectronicsUltimate precision of the absorption saturation methodAlexandre N. TitovPublished Sep 30, 1981• 2 citationsPublisherAbstractIt is shown that lens-like properties of an active medium, induced by a saturating field or an electron distribution, are responsible for the shift and asymmetry of a molecular resonance observed in lasers with a nonlinearly absorbing cell.DOI10.1070/qe1981v011n09abeh008374