Recent investigations of gas discharge and beam quality problems of fast-flow CO2 lasers

Vladimir S. Golubev

doi:10.1117/12.204901

31 March 1995 Recent investigations of gas discharge and beam quality problems of fast-flow CO2 lasers

Vladimir S. Golubev

Author Affiliations +

Proceedings Volume 2502, Gas Flow and Chemical Lasers: Tenth International Symposium; (1995) https://doi.org/10.1117/12.204901
Event: Gas Flow and Chemical Lasers: Tenth International Symposium, 1994, Friedrichshafen, Germany

Abstract

The progress in efficiency and beam quality parameters of fast-flow CO₂-lasers depends upon application of new ideas and results of fundamental and applied researches of gas discharge and beam quality problems. Recent results of gas discharge researches conducted by NICTL are shortly presented, in particular, numerical and experimental modeling of large- area, full-scale discharge systems with 2D segmentation of electrodes. A new approach to the philosophy of discharge stability has been developed. Some fundamental results on discharge homogeneity and stability problems have been obtained. The problems of beam quality are being investigated in NICTL as well, in particular, inhomogeneities of active medium gain and refraction coefficients caused by above mentioned inhomogeneities of discharge plasma and by gas flow turbulence. A positive influence of the turbulent diffusion on gain homogenization has been shown. Some fundamental results on nonlinear interaction of the beam with active medium are presented, including the laser radiation induced development of large scale and small scale (turbulent) inhomogeneities. Several approaches to obtaining pulsed mode of generation of basically CW CO₂-lasers are being developed, such as Q-switching by a molecular gas cell, utilization of controllable mirrors and modulation of discharge input power.

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Vladimir S. Golubev "Recent investigations of gas discharge and beam quality problems of fast-flow CO2 lasers", Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); https://doi.org/10.1117/12.204901

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