28 July 1989 CO2 Laser Gain And Energy Extraction Using 12C And 13C Isotopes
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Proceedings Volume 1042, CO2 Lasers and Applications; (1989) https://doi.org/10.1117/12.951265
Event: OE/LASE '89, 1989, Los Angeles, CA, United States
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.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. M. Jeong, K. M. Jeong, H. P. Chou, H. P. Chou, G. A. Theophanis, G. A. Theophanis, V. H. Hasson, V. H. Hasson, } "CO2 Laser Gain And Energy Extraction Using 12C And 13C Isotopes", Proc. SPIE 1042, CO2 Lasers and Applications, (28 July 1989); doi: 10.1117/12.951265; https://doi.org/10.1117/12.951265

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