Air−combustion product N2−CO2 electric laser

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Abstract
Efficient electron−beam sustainer CO2 laser action has been obtained in H2 : N2 : CO2 mixtures, using H2 as CO2ν2 deactivant. This opens up the possibility of using a fuel−rich hydrocarbon combustion product as a readily obtained laser gas mixtures, since such a mixture can be generated containing free H2. Efficient electron−beam sustainer CO2 laser action is predicted in the combustion exhaust products of the hydrocarbon fuels such as JP−4. A specific output J∼50 J/l atm is anticipated for an initial temperature Tgo=300 °K. Experimental measurement of laser output from JP−4 exhaust has been made in an electron−beam sustainer EDL. A 23−μsec duration discharge with ne∼3×1012 cm−3, E/N∼2.3×10−16 V cm2 was produced. Output J∼50 J/l atm was obtained for Tgo=211 °K. A 5−μsec delay in predicted laser onset and laser output 40% lower than theoretical were observed.

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