INFLUENCE OF CONDENSATION OF THE EMISSION-SPECTRUM ON INTRACAVITY LASER SPECTRAL-ANALYSIS

A model of condensation of the laser emission spectrum in the spectral ranges of the absorption lines of the substance being studied was dev eloped on the basis of a frequency-dependent absorbing intracavity len s. This model can explain most spectral condensation effects. It was s hown that condensation of the emission spectrum is generally observed experimentally as a deformation of the dip profile in the laser emissi on spectrum. An analysis is made of the possibility of determining the concentration of an absorbing substance by measuring the spectral pos ition of the peak of the condensed line. (C) 1998 American Institute o f Physics. [S1063-7850(98)02109-0].