Letter | Published:

Proposed Harmonic Generator or Mixer for Optical Frequencies

Naturevolume 192pages859860 (1961) | Download Citation



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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  1. 1

    Lainé, D. C., Nature, 191, 795 (1961).

  2. 2

    Martin, E. E., Trolan, J. K., and Dyke, W. P., J. App. Phys., 31, 782 (1960).

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  1. Standards Division, National Physical Laboratory, Teddington, Middlesex

    • K. D. FROOME


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