31 March 1995 Recent investigations of gas discharge and beam quality problems of fast-flow CO2 lasers
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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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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); doi: 10.1117/12.204901; https://doi.org/10.1117/12.204901
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