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Proceedings Paper

CO[sub]2[/sub] Laser Gain And Energy Extraction Using [sup]12[/sup]C And [sup]13[/sup]C Isotopes
Author(s): K. M. Jeong; H. P. Chou; G. A. Theophanis; V. H. Hasson
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Paper Abstract

A single-pulse closed volume discharge has been used to characterize the amplification properties of 12C1602 and 13C1602 laser gas mixes. Small signal gain data were obtained from vibrational fluorescence measurements of standard and isotopic laser mixtures under identical pulsed pumping conditions. The variation of the peak gain and post-pump decay rate with CO2 partial pressure and pulse length is discussed. The experimental measurements are compared with the predictions of a kinetics model of the excitation and deactivation processes in a CO2 laser. For both 12CO2 and 13CO2, the calculated decay rates are found to be in good agreement with the experimental values. The modeling results also predict a crossover point from g(13CO2) > g(12CO2) to g(13CO2) < g(12CO2) at pulse lengths near 60 microseconds for a pressure of 1 atm and a 7.7He:2N2:1CO2 gas mixture. The effects of total pressure and gas mixture composition on the crossover point and on energy extraction are discussed.

Paper Details

Date Published: 28 July 1989
PDF: 4 pages
Proc. SPIE 1042, CO2 Lasers and Applications, (28 July 1989); doi: 10.1117/12.951265
Show Author Affiliations
K. M. Jeong, Textron (United States)
H. P. Chou, Textron (United States)
G. A. Theophanis, Textron (United States)
V. H. Hasson, Textron (United States)

Published in SPIE Proceedings Vol. 1042:
CO2 Lasers and Applications
James D. Evans; Edward V. Locke, Editor(s)

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