N. N. Sobolev

Experiment with a cw N2O gasdynamic laser and its qualitative comparison with a CO2 laser

Preliminary experimental data concerning an N2O/N2 thermally excited and selectively pumped mixing cw gasdynamic laser are reported and compared with those concerning a CO2/N2 laser operating at similar conditions.

Analysis of data on the vibrational-relaxation constants in CO2−N2−H2O mixtures, and optimization of a gasdynamic CO2 laser

The optimum stagnation parameters and compositions of the C02-N2-H20 mixture are optimized on the basis of data on the vibrational-relaxation constants. The influence of the uncertainty in the relaxation constants on the optimization results is analyzed.

Low‐stagnation‐temperature characteristics of cw N2O and CO2 gasdynamic mixing lasers pumped by nitrogen or air

Experimental data collected from a N2O/N2(air) thermally excited and selectively pumped cw gasdynamic mixing laser are reported for a range of low stagnation temperatures and compared with data from a CO2/N2(air) laser. Lasers operating with air yield practically identical output as with usual nitrogen pumping.

Gasdynamic CS2 laser with an aim of increasing the efficiency and expanding the spectral range of lasers of this type

The gasdynamic CS2 laser is investigated theoretically and experimentally. It is theoretically demonstrated that the efficiency of the gasdynamic lasers can be increased by using molecules with lower-lying laser and pumping levels than in the case of C02 or N20 gasdynamic layers. Calculations show that under gasdynamic laser conditions, inversion should set in for an entire series of CS2 molecular transitions in the range 11.4–117 μm. Lasing with wavelength 11.4 μm was obtained in experiment on the (0001)-(1000) transition.