Laser device

Details Laser device Laser device

1975-02-27

1976-03-30

Sikes, William L.

Oscillators

Molecular or particle resonant type

330 43, 331 945T, H01S 302

Patent

active

039477819

ABSTRACT:
To prevent deleterious effects from the sputtering of the cathode of a laser, the cathode surface portions exposed to the gaseous filling within the laser envelope are coated with a vaporizable metal. The coated cathode surface portions are held during laser operation at a temperature within a small range of values including the vaporization temperature of the metal coating the cathode surface. The atoms of the coating metal are sputtered off of the cathode surface by ion bombardment during operation but are immediately redeposited from the vapor of the coating metal adjacent to the cathode surface. Cataphoretic containment of the metal vapor within the central portion of the laser envelope is obtained by providing access to the cathode electrode from an anode electrode in each end of the envelope only through insulating tubular members having a length-to-inner diameter ratio greater than 2 and optimally around 5.

REFERENCES:
patent: 3469207 (1969-09-01), Solomon et al.
patent: 3670261 (1972-06-01), Halsted et al.
patent: 3878479 (1975-04-01), Heising et al.

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