Optics and Spectroscopy

Probe-field spectroscopy under conditions of self-saturation

Sergey G. Rautian, Э. Г. Сапрыкин, А. А. Черненко

Published Mar 1, 2005• 10 citations

Abstract

Nonlinear absorption of a probe field is analyzed taking into account intrinsic spontaneous radiation (the self-saturation effect). Systems of two and three nondegenerate levels, as well as a system of two levels with the angular momenta equal to unity, are considered. Changes produced by the self-saturation in the population, polarization, and nonlinear interference effects, as well as in the field splitting of lines, are determined. In certain situations, incoherent spontaneous radiation enhances the interference phenomena.

DOI: 10.1134/1.1890524

Related papers

Effect of own radiation on the linewidth and absorption spectrum of a probe field

Sergey G. Rautian, Э. Г. Сапрыкин, А. А. Черненко

The absorption spectrum of a probe field upon self-saturation on the transition between levels with angular momenta equal to 1/2 is considered. A new class of nonlinear spectroscopic phenomena caused by the nonlinearity (with respect to the density matrix) of the radiative relaxation matrix is predicted. The relative role of the own spontaneous radiation in the broadening of the combining levels and the line, as well as the dependence of the absorption on the polarization of the probe field, is elucidated.

Optics and SpectroscopyDec 1, 20054 citations

Saturation and self-saturation effects in the field of intense laser waves: The J = 1 − J = 1 transition

Sergey G. Rautian, Э. Г. Сапрыкин, А. А. Черненко

The shape of the resonance of a saturated absorption is calculated at an arbitrary intensity of a probe field. It is revealed that, in the case of orthogonal polarizations of strong and probe fields, an increase in the intensity of the probe field can invert the shape of the nonlinear resonance of clearing of the medium, changing it to the resonance of absorption. The saturation of optical transitions by intrinsic spontaneous radiation increases the contrast of the inverted resonance of saturation and narrows its width. In the case of parallel polarizations of the optical fields, an absorption peak can arise in the shape of the nonlinear resonance upon splitting of the lower state.

Optics and SpectroscopyApr 1, 20088 citations

Effects of Saturation and Self-Saturation in Unidirectional-Wave Spectroscopy of Transition between Levels with a Total Moment of J = 1

Э. Г. Сапрыкин, А. А. Черненко

Abstract Nonlinear absorption of a probe field in a system of degenerate levels of an atom characterized by a total moment of J = 1 in unidirectional waves is studied analytically and numerically taking into account saturation by its own spontaneous emission (OSE). The trends in changes of the amplitude and frequency characteristics of the nonlinear resonance associated with open and closed types of transitions for different polarizations of the waves that are introduced by self-saturation are established. Specific manifestations of the effect, including those related to magnetic coherence of levels, are revealed.

Optics and SpectroscopyOct 1, 20192 citations

Эффекты насыщения и самонасыщения в спектроскопии однонаправленных волн на переходы между уровнями с полным моментом J=1

Э. Г. Сапрыкин, А.А. Черненко

AbstractNonlinear absorption of a probe field in a system of degenerate levels of an atom characterized by a total moment of J = 1 in unidirectional waves is studied analytically and numerically taking into account saturation by its own spontaneous emission (OSE). The trends in changes of the amplitude and frequency characteristics of the nonlinear resonance associated with open and closed types of transitions for different polarizations of the waves that are introduced by self-saturation are established. Specific manifestations of the effect, including those related to magnetic coherence of levels, are revealed.

Журнал технической физикиJan 1, 20191 citation

Effects of saturation and self-saturation in a field of opposite spreading laser waves on transition J=1-J=1

Sergey G. Rautian, Э. Г. Сапрыкин, А. А. Черненко

The form of the saturated absorption resonance for atomic transition J=1-J=1 at arbitrary intensities of a probe light field is calculated. The influence of the saturation effect of optical transitions by own spontaneous radiation on the form of a nonlinear resonance is researched. It is revealed, that in case of orthogonal polarizations of strong and probe fields the increase of the probe field intensity can result in inversion of the shape of a nonlinear resonance. The saturation effect of optical transitions by own spontaneous radiation increases contrast of the inverted resonance of saturation and narrows its spectrum. In case of parallel polarizations of optical fields the peak of absorption can arise in the shape of nonlinear resonance at splitting of the lower atomic state.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEJun 15, 20070 citations

Effect of saturation in the field of coherent and intrinsic spontaneous radiation

Sergey G. Rautian, Э. Г. Сапрыкин, А. А. Черненко

Saturation effects in gaseous media in the presence of a high-intensity resonant laser field and in the field of incoherent radiation caused by the intrinsic spontaneous emission are considered. A simple nonlinear set of kinetic equations is proposed for describing the saturation effect in the case of optically thin media and nondegenerate levels. The Bennett structure and the band of homogeneous saturation, whose parameters are interdependent, exist in the velocity distribution. The regularities in the behavior of the band and the Bennett structure under variation in the transition parameters and the intensity of laser radiation are elucidated.

Optics and SpectroscopyFeb 1, 20057 citations