Laser with hybrid cathode

Details Laser with hybrid cathode Laser with hybrid cathode

H - Electricity

01

S

345/34

H01S 3/02 (2006.01) H01S 3/036 (2006.01) H01S 3/038 (2006.01)

Patent

CA 1274012

Abstract of the Disclosure A laser is provided comprising a laser envelope and a gain medium disposed in the laser envelope. The gain medium comprises a compound subject to dissociation into a plurality of components. Circuitry is included for generating an electrical discharge in the laser envelope, a portion of the electrical discharge passing through the gain medium and dissociating a portion of the compound thereof into the plurality of components. The discharge generating circuitry comprises a cathode, the cathode comprising a first portion for emitting the electrical discharge toward an anode. Such first portion comprises a catalyst for aiding the recombina- tion of the dissociated plurality of components. The first portion of the cathode sputters particulates therefrom during the electrical discharge and a surface is disposed within the laser envelope for collecting the sputtered particulates. Means, including a second portion of said cathode, are addi- tionally provided for spacing the first portion of the cathode sufficiently from the collecting surface to substantially prevent the electrical discharge from being emitted from the first portion to the collected particulates, and thereby constrain the electrical discharge to occur substantially directly between the cathode and the anode. With such arrangement, the sputtered particulates are inhibited from entering the resonant cavity of the laser and adhering to the optics thereof. Thus, the useful operating life of the laser is increased.

507829

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