Abstract
The main features of broadband intracavity laser spectroscopy (ILS), the most sensitive technique of absorption-spectrum measurements, is investigated. The factors that limit the sensitivity of the ILS method are studied, and the conditions for reaching its maximum sensitivity are formulated. The main practical applications of the ILS method are described, such as detection of weak absorption spectra and measurements of low gas concentrations, registration of amplification spectra and of the spectral distribution of external radiation, measurement of the cross sections for nonlinear processes, investigation of transient processes in an electric discharge, and investigation of the kinetics of multistage chemical reactions.
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