Abstract
IN a recent communication1, Lainé has suggested the use of my latest form of ‘cold cathode’ arc harmonic generator as a mixer for obtaining beats at high microwave frequencies (that is, frequencies corresponding to submillimetre waves) between the outputs from two optical masers. I would like to comment on this proposal and suggest a simpler alternative device.
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References
Lainé, D. C., Nature, 191, 795 (1961).
Martin, E. E., Trolan, J. K., and Dyke, W. P., J. App. Phys., 31, 782 (1960).
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FROOME, K. Proposed Harmonic Generator or Mixer for Optical Frequencies. Nature 192, 859–860 (1961). https://doi.org/10.1038/192859a0
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DOI: https://doi.org/10.1038/192859a0
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