L. N. Orlov

New operation regimes of a CO2 laser with intracavity saturable absorber

Abstract New operation regimes of a CO 2 laser with CH 3 OH vapour as intracavity saturable absorber have been realized experimentally. The time evolution of the laser output power may be interpreted by the heteroclinic orbits in the phase space around two, three and more fixed unstable points with intensities different from zero.

Giant pulsed molecular laser for plasma diagnostics

where i is wavelength of the probe radiation; 8 is the scattering angle; k D = (Te/4~nee2) I/2 is the Debye radius; ne, T e are the electron concentration and temperature; e is the charge of the electron. For e > i corresponds to collective radiation scattering, and analysis of its spectrum allows the ion temperature to be measured, independently of electron concentration, and plasma oscillations and instabilities to be studied. As is evident from the expression for ~, using lasers for diagnostics in the visibie and IR regions of hot plasma (T e -~ 1 KeV) with moderate density (n e = 10• cm -3) collective processes can only be observed with small scattering angles, which prevents localized measurements and makes the detection of useful signals difficult. Switching to a laser in the submiiiimeter (SVIM) region allows operation at angles up to ~/2 (which significantly increases spatial resolution) and allows heterodyne methods of detection to be used. Furthermore, the scattered power is proportional to the square of the wavelength of the probe radication, whch eases detection.

Automated stabilized tunabile CO2 laser spectrometer designed to study molecule parameters

A frequency-stabilized, tunable CO2 laser has been employed to measure absorption coefficients and saturation parameters on the lines of several molecules. The results are used for determining the Einstein coefficients of CO2, CH3OH and CD3OD molecules, frequency detunings and saturation intensities for CH3OH and CD3OD.