Low solar background, high sensitivity active atomic resonance f

Details Low solar background, high sensitivity active atomic resonance f Low solar background, high sensitivity active atomic resonance f

1986-09-29

1989-05-09

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

307425, 250361C, 2504581, 455609, H04B 900

Patent

active

048295973

ABSTRACT:
An optical atomic resonance filter using two pump lasers, a buffer gas and magnesium as an atomic vapor converts underwater signals in the Fraunhofer wavelengths in the green portion of the spectrum to UV light which is readily detectable by conventional photomultiplier tubes.

REFERENCES:
patent: 3795819 (1974-03-01), Harris
patent: 3801797 (1974-04-01), Harris et al.
patent: 4058739 (1977-11-01), Bjorkholm
patent: 4292526 (1981-09-01), Marling
patent: 4313057 (1982-01-01), Gelbwachs

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