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Proceedings Paper

Recent investigations of gas discharge and beam quality problems of fast-flow CO2 lasers
Author(s): Vladimir S. Golubev
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Paper 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.

Paper Details

Date Published: 31 March 1995
PDF: 9 pages
Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); doi: 10.1117/12.204901
Show Author Affiliations
Vladimir S. Golubev, Scientific Research Ctr. for Technological Lasers (Russia)

Published in SPIE Proceedings Vol. 2502:
Gas Flow and Chemical Lasers: Tenth International Symposium
Willy L. Bohn; Helmut Huegel, Editor(s)

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