21 February 2008 Hydrocarbon-free resonance transition 795-nm rubidium laser
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An optical resonance transition rubidium laser (52P1/2 → 52S1/2) is demonstrated with a hydrocarbon-free buffer gas. Prior demonstrations of alkali resonance transition lasers have used ethane as either the buffer gas or a buffer gas component to promote rapid fine-structure mixing. However, our experience suggests that the alkali vapor reacts with the ethane producing carbon as one of the reaction products. This degrades long term laser reliability. Our recent experimental results with a "clean" helium-only buffer gas system pumped by a Ti:sapphire laser demonstrate all the advantages of the original alkali laser system, but without the reliability issues associated with the use of ethane.
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Sheldon S. Q. Wu, Thomas F. Soules, Ralph H. Page, Scott C. Mitchell, V. Keith Kanz, Raymond J. Beach, "Hydrocarbon-free resonance transition 795-nm rubidium laser", Proc. SPIE 6874, High Energy/Average Power Lasers and Intense Beam Applications II, 68740E (21 February 2008); doi: 10.1117/12.765592; https://doi.org/10.1117/12.765592


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