Laser utilizing a gaseous lasing medium and method for operating

Details Laser utilizing a gaseous lasing medium and method for operating Laser utilizing a gaseous lasing medium and method for operating

1983-10-18

1986-09-16

Scott, Jr., Leon

Coherent light generators

Particular active media

Gas

372 34, 372 61, H01S 322

Patent

active

046126465

ABSTRACT:
The invention relates to an improvement in gas lasers and a method of operating the same. In one aspect, the invention is an improved method for operating a high-power gas laser. The improvement comprises introducing the gas lasing medium tangentially to the laser tube at a pressure establishing a forced vortex in the tube. The vortex defines an axially extending core region characterized by a low pressure and temperature relative to the gas inlet and the exterior of the vortex. An electrical discharge is established in the core region to initiate lasing of the gas. The gas discharge from the tube is passed through a diffuser. As in conventional gas lasers, firing results in a very abrupt increase in gas temperature and in severe disruption of the gas. However, the gas vortex almost immediately restores the gas to its pre-firing condition. That is, almost all of the waste heat is transferred radially to the laser wall, and the original gas-flow pattern is restored. As a result, the power output of the laser is increased significantly, and the laser firing repetition rate is markedly increased.

REFERENCES:
patent: 3646475 (1972-02-01), Taylor
patent: 3908175 (1975-09-01), Damm
patent: 4242646 (1980-12-01), Macken
patent: 4242647 (1980-12-01), Macken
patent: 4500998 (1985-02-01), Kuwabara et al.
Belostotsky et al.; "Vortex-Flow Cooled Laser", Sov. Jour. Opt. Tech., vol. 35, No. 1, Jan.-Feb. 1968.
Nash; "Vortex Heat Exchanger for IR Detectors"; Appl. Phys., vol. 14, No. 12, Dec. 1975.

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