Abstract
ULTRA-VIOLET coherent light has been generated directly at room temperature in a pulsed nitrogen-gas laser. A group of 20 strong simultaneous lines have been observed in the ultra-violet. Thirty lines have been identified. These range in the ultra-violet spectrum from 3000 Å to 4000 Å. The strongest line has been observed at 3371 Å the strongest visible line is at 3400 Å. The output radiation is believed to be produced as the result of inversion in the triplet state of nitrogen, resulting in subsequent emission in the second positive group, C3πu→B3πg. The beam has a full angular width of 1 milliradian, as measured 100 ft. from the confocal laser cavity.
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References
Mathias, L., and Parker, J. T., J. App. Phys. Letters, 3, 16 (1963).
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HEARD, H. Ultra-violet Gas Laser at Room Temperature. Nature 200, 667 (1963). https://doi.org/10.1038/200667a0
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DOI: https://doi.org/10.1038/200667a0
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