CO[sub]2[/sub] Laser Gain And Energy Extraction Using [sup]12[/sup]C And [sup]13[/sup]C Isotopes

K. M. Jeong; H. P. Chou; G. A. Theophanis; V. H. Hasson

doi:10.1117/12.951265

28 July 1989 CO₂ Laser Gain And Energy Extraction Using ¹²C And ¹³C Isotopes

K. M. Jeong, H. P. Chou, G. A. Theophanis, V. H. Hasson

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

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.

Citation Download Citation

K. M. Jeong, H. P. Chou, G. A. Theophanis, and V. H. Hasson "CO₂ Laser Gain And Energy Extraction Using ¹²C And ¹³C Isotopes", Proc. SPIE 1042, CO2 Lasers and Applications, (28 July 1989); https://doi.org/10.1117/12.951265

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