Abstract
WE have previously reported pulsed infra-red oscillations in the afterglow of a helium-neon plasma at pressures of about 1 torr1. This communication describes results obtained at total pressures of up to 240 torr when 84 W output has been obtained. The usual near-confocal mirror system is used2 containing a quartz tube 2 cm internal diameter and 150 cm long, having windows at the Brewster angle.
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References
Boot, H. A. H., and Clunie, D. M., Nature, 197, 173 (1963).
Rigrod, W. W., Kogelnik, H., Brangaccio, D. J., and Herriott, D. R., J. App. Phys., 33, 743 (1962).
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BOOT, H., CLUNIE, D. & THORN, R. Pulsed Laser Operation in a High-pressure Helium Neon Mixture. Nature 198, 773–774 (1963). https://doi.org/10.1038/198773b0
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DOI: https://doi.org/10.1038/198773b0
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