Gasdynamic laser

Details Gasdynamic laser Gasdynamic laser

1982-06-09

1983-11-01

Davie, James W.

Coherent light generators

Particular pumping means

Gas dynamic

372 59, 372 58, 372 89, 372 60, 372 35, H01S 309

Patent

active

044133456

ABSTRACT:
In a gasdynamic laser in which the hot flowing lasing medium (e.g. CO.sub.2 --N.sub.2) is cooled by expansion in a Laval nozzle 1, liquid droplets are introduced into the expanding lasing medium to increase the cooling effect. The liquid can be water, preferably heavy water, from a container 4 pressurized by the laser medium in plenum 6 and introduced from pipes 3 into a region immediately before the nozzle neck 2 so as to be atomized and accelerated through the neck 2. Evaporation occurs downstream of the neck and causes an increase in the cooling. The droplets preferably have a size in the range 1-20 .mu.m and may contain dissolved CO.sub.2. The droplets may be dispersed in a super cooled gas which is then injected into the lasing medium.

REFERENCES:
patent: 4100507 (1978-07-01), Born et al.
patent: 4283686 (1981-08-01), Daugherty et al.

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