Accession Number : ADD006487

Title :   Compact Flowing Gas System for Lasers.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Pratt,Henry L

Report Date : 23 Apr 1979

Pagination or Media Count : 10

Abstract : A miniature air actuated vacuum transducer is connected on downstream side of a laser and is disposed for creating a vacuum suction for exhausting gas from a flowing gas laser system. Miniature gas lasers such as waveguide CO2 systems utilize internal gas mixtures at partial atmospheric pressures. Longitudinally excited lasers typically are operated at low pressures on the order of 35 to 200 Torr. The transversely excited (TE) waveguide lasers are operated at somewhat higher pressures (50 to 300 Torr typically), and although pressures as high as 4 atmospheres have been reported, numerous limitations still exist in the development of positive pressure transversely excited (TEA) lasers in waveguide configurations. Successful operation of low power, longitudinally excited CO2, waveguide lasers has been obtained withh sealed off gas reservoirs, and commercial versions of CW waveguide lasers are now available from at least two sources. However for higher power, pulsed, and TE configurations, flowing gas systems at partial atmospheric pressures are generally employed with some sort of vacuum pumping. The triple requirements of relatively low absolute pressure (100 Torr), capable of starting at atmospheric pressure, and capable of exhausting into atmospheric pressure cannot be met by most of the lighter and smaller classes of vacuum pumps.

Descriptors :   *Patent applications, *Vacuum pumps, *Gas lasers, Low pressure, Venturi tubes

Subject Categories : Lasers and Masers
      Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE