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Journal of Experimental and Theoretical Physics

Spontaneous optical-coherence transfer and the nonlinear spectroscopy of gases

Sergey G. Rautian

Published Jan 1, 1999• 5 citations
Publisher

Abstract

Nonlinear-spectroscopy population effects due to spontaneous transfer of optical coherence are examined. The existence in the velocity distribution of new resonance elements of a specific form is established. The occurrence of these effects in the nonlinear resonance of a counterpropagating wave is analyzed.
DOI
10.1134/1.558756

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The review deals with resonance phenomena resulting from saturation of low-pressure-gas absorption lines by a coherent optical field, when the spectral lines are inhomogeneously broadened by the Doppler effect. Principal attention is paid to narrow resonances of width much smaller than the Doppler widths, which are produced upon saturation of the absorption by light waves under various experimental conditions (inside and outside the laser resonator, in traveling and standing waves, in spatially separated waves, etc.), owing to different effects (absorption saturation, mode interaction in the laser). Each of the phenomena is considered from both the theoretical and the experimental points of view. The phenomena considered serve as a basis of a new branch of optical spectroscopy, namely nonlinear laser spectroscopy of ultrahigh resolution.