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Proceedings Paper

Scaling laws for designing high-power cw CO2 lasers
Author(s): Vladimir S. Golubev; Ashish Kumar Nath
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Paper Abstract

The scaling laws for designing high power CW CO2 lasers have been established, considering the saturation intensity, optical damage threshold of the optical resonator components and the small signal gain. In transverse flow CO2 lasers having discharge of square cross section, the discharge length L and its width W for a specific laser power P (Watt) and gas flow velocity V (cm/s) can be given by L = 1.4 x 104/P(superscript ½V-1 cms and V = 0.04P½cms. The optimum transmitivity of the output coupler is found to be almost constant (about 60%) independent of the small signal gain and laser power. In fast axial flow CO2 lasers the gas flow should be divided into several discharge tubes to maintain the flow velocity within sonic limit. The discharge length in this type of laser does not depend explicitly on the laser power, instead it depends on the input power density in the discharge and the gas flow velocity. Various considerations for ensuring better laser beam quality are also discussed.

Paper Details

Date Published: 27 July 2000
PDF: 14 pages
Proc. SPIE 4165, Progress in Research and Development of High-Power Industrial CO2 Lasers, (27 July 2000); doi: 10.1117/12.394138
Show Author Affiliations
Vladimir S. Golubev, Institute on Laser and Information Technologies (Russia)
Ashish Kumar Nath, Ctr. for Advanced Technology (India)

Published in SPIE Proceedings Vol. 4165:
Progress in Research and Development of High-Power Industrial CO2 Lasers
Vladislav Ya. Panchenko; Vladimir S. Golubev, Editor(s)

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