Oscillators – Molecular or particle resonant type
Patent
1976-07-12
1978-05-09
Edlow, Martin H.
Oscillators
Molecular or particle resonant type
331 945PE, 331 945P, H01S 300
Patent
active
040889653
ABSTRACT:
A helium-nitrogen laser is described in which energy in the visible range is emitted as a result of charge transfer reaction between helium ions and nitrogen molecules. The helium and nitrogen are present in a gas mixture at several atmospheres pressure, with a nitrogen partial pressure on the order of less than one percent. Prior to applying a discharge pulse to the gas mixture at the high pressure by means of a pair of main discharge electrodes, the gas mixture is preionized to prevent arcing when the discharge pulse is applied. The preionization is achieved by the application of a high voltage across a pair of secondary electrodes which are spaced apart in a direction perpendicular to the spacing direction of the main discharge electrodes and the longitudinal axis of the space in which the gas mixture is contained. Feedback, by means of a pair of appropriately spaced mirrors, is provided, to produce coherent energy pulses at a selected wavelength.
REFERENCES:
patent: 3876958 (1975-04-01), Parker
Collins et al., Appl. Phys. Lett., vol. 24, May 15, 1974, pp. 477-478.
Collins et al., Appl. Phys. Lett., vol. 25, No. 6, Sep. 15, 1974.
Ault et al., Appl. Phys. Lett., vol. 27, No. 7, Oct. 1, 1975.
Laudenslager James B.
Pacala Thomas J.
Edlow Martin H.
Manning John R.
McCaul Paul F.
Mott Monte F.
The United States of America as represented by the Administrator
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