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Results of experimental studies of the chemical HF laser with a non-chain reaction are presented. The possibility of the total laser efficiency of 5 % is shown when a traditional C-to-C pumping circuit with the charging voltage of 20-24 kV is used. It is experimentally shown that the specific radiation output energy of 21 J/l is reached at the specific pump energy of 350 J/l in SF6/H2 = 14/1 mixture at the total pressure of 0.27 bar.

The results of the formation and amplification of positive chirped 0.1 ns laser pulse at a central wavelength of 470 nm in the laser system THL-100 are presented. It is shown that a front-end allows forming a radiation pulse with a Gaussian intensity profile and the energy up to 7 mJ. At amplification in XeF(C-A) amplifier of the pulse with 2-5 mJ energy a saturated mode is realized and 3.2 J output laser beam energy is reached.

Results of experimental measurements and numerical simulations of the N 2 and XeF 2 gas pressure effects on the gain characteristics are presented in the paper. It is experimentally and theoretically is shown that maximum total gain (5-6)×10 4 achieved at a pump energy E = 240 J, 0.2 Torr XeF 2 and 0.5 atm N 2 pressure. Increasing and decreasing of N 2 pressure leads to decrease of the gain. The possibility of the XeF(C-A) amplifier operation in a generator mode is discussed and the theoretical study results of generation are presented. It is shown that an annular laser radiation with energy up to 8.5 J can be obtained. The study results of the influence on the laser energy of N 2 and XeF 2 pressure and reflectance coefficient of output mirror are presented.

In present paper the results of an experimental research of a qualitative radiation formation with pulse duration of 3.5 and 0.15 nanoseconds in one discharge block of XeCl laser with pump pulse duration of 35 ns at use resonator with SBS mirror are presented.

In the present paper the perspectives using of excimer media for formation of a short high power laser radiation pulses are discussed. Research results of Gas Laser Laboratory of IHCE SD RAS, Tomsk, Russia in this area are shown.

Influence of the discharge burning conditions on output radiation parameters and overall performance of a discharge pumped XeCl laser with pump pulse duration of 20 ns is experimentally investigated. It is shown that a 3.9 J/l•atm maximal specific output laser energy from the active medium is realized in the discharge consisting of the strongly pronounced macro heterogeneities. Laser efficiency of a 2.7 % is reached at discharge current density of a 1.2-1.4 kA/cm2.© (2006) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Results of experimental and theoretical investigations of discharge XeCl laser with 30 ns (FWHM) radiation pulse duration are presented. Laser generates the laser energy of 0.35 J with 2.2% total electric efficiency. Calculated laser radiation parameters and discharge parameters have a good agreement with experimental results. Influence of basic plasma-chemical processes in discharge on laser output and efficiency is shown. Maximal laser efficiency relatively pumping power was 3.7%.

Formation of high quality laser beam and the reasons of wave front distortion in electric discharge XeCl laser had been investigated. The influence of macro and micro-inhomogeneities in active volume on radiation divergence is discussed. Possibility of amplification of diffraction limited laser beam practically without distortion is shown.© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.