Laser with travelling wave excitation

Details Laser with travelling wave excitation Laser with travelling wave excitation

1976-06-10

1979-08-28

Larkins, William D.

Oscillators

Molecular or particle resonant type

331 945D, 331 945G, H01S 3097

Patent

active

041662520

ABSTRACT:
A pair of elongated electrodes are located in a common plane, separated from each other by an elongated gap. A gaseous medium capable of being stimulated to emit radiation by laser action is located in the gap. A discharge between the electrodes is initiated at a predetermined position by a pumping means which also produces an electrical field which decreases uniformly and monotonically from said predetermined position as the distance from this position increases, such that the discharge formative lag time increases uniformly and monotonically from said predetermined position. The variation in electrical field strength, and thus the formative time lag, can be obtained, for example, by forming the gap to be wedge-shaped, by changing the pressure of the gaseous medium with respect to the length of the gap by introducing gas flow along the length of the gap by shaping the edges of the electrodes to be more pointed at the predetermined position and to have an increasing radius of curvature, by the addition of an electrical and/or magnetical field, or the like. The discharge can be initiated by a spark gap located in the same vessel as the electrodes.

REFERENCES:
patent: 3729689 (1973-04-01), Godard et al.
patent: 3757248 (1973-09-01), Small
Herden, "Compact . . . Subnanosecond Nitrogen . . . Lasers . . . ", Physics Letters, vol. 54A, No. 1, Aug. 11, 1975, pp. 96-98.
Bergmann, "uv TEA Laser with 760-Torr N.sub.2 ", Applied Physics Letters, vol. 28, No. 2, Jan. 15, 1976, pp. 84-85.

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