Large area discharge RF excited CO2 laser

X. S. Zhang, H. J. Baker, D. R. Hall

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A planar, RF-excited CO2 laser with an electrode spacing of 7.5 mm and a total discharge area of 320 cm2 is described. It emits a multimode output of 330 W for a 2-kW input, corresponding to a specific power output of 10 kW m-2. The laser has been used as part of a program to establish the scalability of the large-area concept and to provide detailed information on the gas temperature and carbon dioxide dissociation rates in this novel discharge format. Dissociation rates have been quantified by transfer of gas leaving the discharge in the slow-flow mode to a gas chromatograph system. The degree of dissociation observed at the output of the discharge for a gas mixture of 7:18:75 CO2:N2:He closely correlates with the flow dependence of the output power of He-rich mixtures. The data are useful for the assessment of gas consumption and the tradeoff power that must be made as the flow rate and He content are reduced toward static gas conditions.

Original languageEnglish
Number of pages2
Publication statusPublished - 1989
EventConference on Lasers and Electro-Optics 1989 - Baltimore, MD, United States
Duration: 24 Apr 198928 Apr 1989


ConferenceConference on Lasers and Electro-Optics 1989
CountryUnited States
CityBaltimore, MD

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