Oscillators – Molecular or particle resonant type
Patent
1971-08-10
1977-02-08
Bauer, Edward S.
Oscillators
Molecular or particle resonant type
331 945G, 331 945PE, H01S 300
Patent
active
040074307
ABSTRACT:
A method and apparatus for producing intense, coherent, monochromatic light from a low temperature plasma are disclosed. The apparatus includes a housing for confining a gas at subatmospheric pressure and including a set of reflectors defining an optical cavity. At least one anode and cathode are positioned within the gas. First control means control the voltage applied to the anode and second control means independently control the temperature of the cathode. The pressure of the gas is controlled by a third control means. An intense monochromatic output is achieved by confining the gas in the housing at a controlled pre-determined reduced pressure, independently controlling the temperature of the electron emitting cathode and applying a predetermined controlled low voltage to the anode. An intermediate mode current is drawn from the cathode and produces in the confined gas, a region having a high density of metastable atomic states leading to a population inversion. A low temperature, high-density plasma is continuously produced in said region leading to laser emission between said reflectors. Intense, coherent monochromatic light is emitted as a result of the recombination of ions and electrons in the plasma.
REFERENCES:
patent: 3395364 (1968-07-01), Bridges
patent: 3413568 (1968-11-01), Gordon et al.
Handbook of Chemistry and Physics, The Chemical Rubber Company, 44th Edition, 1962-1963, p. 3097.
Gordon et al: "Continuous Visible Laser Action in Singly Ionized Argon, Krypton and Xenon," Applied Physics Letters vol. 4, May 15, 1964, pp. 178-180.
Fletcher James C. Administrator of the National Aeronautics and Space
Jensen Carl A.
Libby Willard F.
Wood Lowell L.
Bauer Edward S.
Grifka Wilfred
Manning John R.
Mott Monte F.
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